TWP/SKYRAD/C2 - PSP and NIP, window contamination

On several occasions, large (10 percent) differences between the global
PSPs and the NIP were observed.  In each case, the NIP reported low
relative to the direct flux reported by the PSPs.  These occurences
persisted for several days each time and are likely due to salt on one
or more of the radiometers.

• PSP shaded mean(psps_mean)
• NIP mean(nip_mean)
• PSP shaded standard deviation(psps_sd)
• PSP1 unshaded maximum(psp1_max)
• NIP standard deviation(nip_sd)
• NIP minimum(nip_min)
• PSP1 unshaded mean(psp1_mean)
• PSP shaded maximum(psps_max)
• PSP shaded minimum(psps_min)
• NIP maximum(nip_max)
• PSP1 unshaded standard deviation(psp1_sd)
• PSP1 unshaded minimum(psp1_min)

• Raw data stream - documentation not supported(Raw data stream - documentation not supported)

• NIP maximum(nip_max)
• PSP shaded mean(psps_mean)
• PSP1 unshaded standard deviation(psp1_sd)
• NIP standard deviation(nip_sd)
• NIP mean(nip_mean)
• NIP minimum(nip_min)
• PSP shaded minimum(psps_min)
• PSP1 unshaded mean(psp1_mean)
• PSP1 unshaded minimum(psp1_min)
• PSP shaded maximum(psps_max)
• PSP1 unshaded maximum(psp1_max)
• PSP shaded standard deviation(psps_sd)

TWP/C2/SKYRAD PSP and NIP, window contamination

On several occasions, large (10 percent) differences between the global
PSPs and the NIP were observed.  In each case, the NIP reported low
relative to the direct flux reported by the PSPs.  These occurences
persisted for several days each time and are likely due to salt on one
or more of the radiometers.

• PSP shaded mean(psps_mean)
• NIP mean(nip_mean)
• PSP shaded standard deviation(psps_sd)
• PSP1 unshaded maximum(psp1_max)
• NIP standard deviation(nip_sd)
• NIP minimum(nip_min)
• PSP1 unshaded mean(psp1_mean)
• PSP shaded maximum(psps_max)
• PSP shaded minimum(psps_min)
• NIP maximum(nip_max)
• PSP1 unshaded standard deviation(psp1_sd)
• PSP1 unshaded minimum(psp1_min)

• Raw data stream - documentation not supported(Raw data stream - documentation not supported)

• NIP maximum(nip_max)
• PSP shaded mean(psps_mean)
• PSP1 unshaded standard deviation(psp1_sd)
• NIP standard deviation(nip_sd)
• NIP mean(nip_mean)
• NIP minimum(nip_min)
• PSP shaded minimum(psps_min)
• PSP1 unshaded mean(psp1_mean)
• PSP1 unshaded minimum(psp1_min)
• PSP shaded maximum(psps_max)
• PSP1 unshaded maximum(psp1_max)
• PSP shaded standard deviation(psps_sd)

TWP/C2/SKYRAD PSP and NIP, window contamination

On several occasions, large (10 percent) differences between the global
PSPs and the NIP were observed.  In each case, the NIP reported low
relative to the direct flux reported by the PSPs.  These occurences
persisted for several days each time and are likely due to salt on one
or more of the radiometers.

• PSP shaded mean(psps_mean)
• NIP mean(nip_mean)
• PSP shaded standard deviation(psps_sd)
• PSP1 unshaded maximum(psp1_max)
• NIP standard deviation(nip_sd)
• NIP minimum(nip_min)
• PSP1 unshaded mean(psp1_mean)
• PSP shaded maximum(psps_max)
• PSP shaded minimum(psps_min)
• NIP maximum(nip_max)
• PSP1 unshaded standard deviation(psp1_sd)
• PSP1 unshaded minimum(psp1_min)

• Raw data stream - documentation not supported(Raw data stream - documentation not supported)

• NIP maximum(nip_max)
• PSP shaded mean(psps_mean)
• PSP1 unshaded standard deviation(psp1_sd)
• NIP standard deviation(nip_sd)
• NIP mean(nip_mean)
• NIP minimum(nip_min)
• PSP shaded minimum(psps_min)
• PSP1 unshaded mean(psp1_mean)
• PSP1 unshaded minimum(psp1_min)
• PSP shaded maximum(psps_max)
• PSP1 unshaded maximum(psp1_max)
• PSP shaded standard deviation(psps_sd)

TWP/C2/SKYRAD PSPs and NIP Window Contamination

There was a large discrepancy in the comparison of the PSPs and NIP
during December on the order of 5-10 percent.  This discrepancy got
worse through the month and then suddenly improved after a rain event
on December 23.  There was likely salt deposited on the radiometer
windows that was washed off in the rain.  The observer daily rounds
are being modified to include more regular cleaning of radiometers
to address this issue.

• PSP shaded mean(psps_mean)
• NIP mean(nip_mean)
• PSP shaded standard deviation(psps_sd)
• PSP1 unshaded maximum(psp1_max)
• NIP standard deviation(nip_sd)
• NIP minimum(nip_min)
• PSP1 unshaded mean(psp1_mean)
• PSP shaded maximum(psps_max)
• PSP shaded minimum(psps_min)
• NIP maximum(nip_max)
• PSP1 unshaded standard deviation(psp1_sd)
• PSP1 unshaded minimum(psp1_min)

• Raw data stream - documentation not supported(Raw data stream - documentation not supported)

• NIP maximum(nip_max)
• PSP shaded mean(psps_mean)
• PSP1 unshaded standard deviation(psp1_sd)
• NIP standard deviation(nip_sd)
• NIP mean(nip_mean)
• NIP minimum(nip_min)
• PSP shaded minimum(psps_min)
• PSP1 unshaded mean(psp1_mean)
• PSP1 unshaded minimum(psp1_min)
• PSP shaded maximum(psps_max)
• PSP1 unshaded maximum(psp1_max)
• PSP shaded standard deviation(psps_sd)

TWP/SKYRAD/C1 - Comparison between shaded and unshaded PIRs

We notice a clear-sky diurnal pattern which shows PIR_shaded >
PIR_total in the morning with a maximum difference of about 2.5
W/m^2. They are equal at about 10AM local time, PIR_total > PIR_shaded
from 10AM until about 2PM reaching a max difference of about 5W/m^2 at
noon. PIR_shaded > PIR_total after 2PM, reaching a max difference of
about 2.5 W/m^2 around 4PM. During the night, PIR_shaded is typically
about 0.5 W/m^2 greater than PIR_total. We have thought about the
difference at noon, and think that this difference may be due to a
heating of the dome of the unshaded PIR, or perhaps a contribution
from the IR portion of the solar spectrum.  Initial simple
calculations show that this solar contribution may be of the magnitude
as the difference in the two PIRs (consultation with Tom Stoffel at
NREL indicates that the source of the discrepancy is likely the solar
IR).  We cannot explain the structure over the remainder of the day.

There are also some general trends that should be noted: (1)cloudy
conditions result in PIR_shaded > PIR_total (2)Larger positive spikes
in PIR_total - PIR_shaded occur in rain, particularly when the rain
rate >10mm/hr (even for a very short period).

In brief, the two radiometers usually agree within 1 W/m^2 
at night and under cloudy conditions.  The two instruments tend to
deviate during sunny conditions. The descrepancy between the shaded
and unshaded instruments generally peaks around 5 W/m^2 near local
noon with the unshaded instrument reporting higher values. 

Note: the unshaded PIR is incorrectly named "shaded2" during this
time period.  This is covered in a separate DQR.

• Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer1(inst_down_long_hemisp_shaded1_tp)
• Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer2(inst_down_long_hemisp_shaded2_tp)
• Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
  Pyrgeometer1(inst_down_long_shaded1_dome_resist)
• Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
  Pyrgeometer1(inst_down_long_shaded1_case_resist)
• Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
  Pyrgeometer2(inst_down_long_shaded2_dome_resist)
• Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
  Pyrgeometer2(inst_down_long_shaded2_case_resist)

• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Standard
  Deviation(down_long_hemisp_shaded2_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp_shaded2)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Maxima(down_long_hemisp_shaded1_max)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Standard
  Deviation(down_long_hemisp_shaded1_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Maxima(down_long_hemisp_shaded2_max)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp_shaded1)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Minima(down_long_hemisp_shaded1_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Minima(down_long_hemisp_shaded2_min)

TWP/SKYRAD/C1 - Change in relationship between shaded and unshaded PIRs

As before, there is good agreement between the two up-looking
PIRs.  However, there has been an unusual change in the relationship
between the two instruments.  Prior to the RESET visit at the end of
August, the two instruments agreed to within 1 W/m^2 at night and
on sunny days, the unshaded radiometer reported higher values during
the day.  The difference between the two instruments exhibited a
cosine-like diurnal curve peaking at about 5 W/m^2 near solar noon. 
On 970830, the data logger was reconfigured and since that time,
the behavior has been different.  Now, there is a 5-10 W/m^2
difference between the two radiometers with the *shaded* instrument
reading higher than the unshaded during the day.  At night, the two
still agree within about 1 W/m^2.  There is still a cosine-like
diurnal dependance to the instrument discrepancy during the day - with
the offset, this actually results in closer agreement between the two
radiometers near solar noon than in the morning or afternoon.

Note: the unshaded PIR is incorrectly named "shaded2" during this
time period.  This is covered in a separate DQR.

• Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer1(inst_down_long_hemisp_shaded1_tp)
• Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer2(inst_down_long_hemisp_shaded2_tp)
• Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
  Pyrgeometer1(inst_down_long_shaded1_dome_resist)
• Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
  Pyrgeometer1(inst_down_long_shaded1_case_resist)
• Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
  Pyrgeometer2(inst_down_long_shaded2_dome_resist)
• Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
  Pyrgeometer2(inst_down_long_shaded2_case_resist)

• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Standard
  Deviation(down_long_hemisp_shaded2_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp_shaded2)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Maxima(down_long_hemisp_shaded1_max)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Standard
  Deviation(down_long_hemisp_shaded1_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Maxima(down_long_hemisp_shaded2_max)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp_shaded1)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Minima(down_long_hemisp_shaded1_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Minima(down_long_hemisp_shaded2_min)

TWP/SKYRAD/C1 - Shaded vs. unshaded radiometer comparison

The daily average difference between the shaded and unshaded PIRs
reversed on 19980428.  Previous to then, the unshaded PIR was typically
about 2 Wm-2 less than the shaded PIR.  Since the 28th, the unshaded
PIR has been averaging about 4-5 Wm-2 greater than the shaded PIR.
This latter difference worsened for the period 5/25 to 5/31, when the
daily average difference increased to between 8-10 Wm-2.    The
disagreement is typically greater at night, reaching differences of
greater than 12 Wm-2 during the period 5/25-5/31.  The cause for the
switch in sign of the difference can most likely be attributed to
instrument replacement, however the (in general) larger absolute
disagreement after Apr 28th indicates a possible calibration problem.
The cause of the large discrepancies from 5/25 to 5/31 is unknown.

I noticed that the daylight differences increased slightly, with an
attendant slight decrease in the night differences. This daylight
difference is on the order of an additional 1 Wm-2.

Note: the unshaded PIR is incorrectly named "shaded2" during this
time period.  This is covered in a separate DQR.

• Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer1(inst_down_long_hemisp_shaded1_tp)
• Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer2(inst_down_long_hemisp_shaded2_tp)
• Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
  Pyrgeometer1(inst_down_long_shaded1_dome_resist)
• Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
  Pyrgeometer1(inst_down_long_shaded1_case_resist)
• Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
  Pyrgeometer2(inst_down_long_shaded2_dome_resist)
• Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
  Pyrgeometer2(inst_down_long_shaded2_case_resist)

• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Standard
  Deviation(down_long_hemisp_shaded2_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp_shaded2)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Maxima(down_long_hemisp_shaded1_max)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Standard
  Deviation(down_long_hemisp_shaded1_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Maxima(down_long_hemisp_shaded2_max)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp_shaded1)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Minima(down_long_hemisp_shaded1_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Minima(down_long_hemisp_shaded2_min)

TWP/SKYRAD/C1 - PSPs and NIP: Persistent bias

The NIP/Eppley comparison shows that around solar noon,
the NIP is low relative to the Eppleys by about 4% with
this fraction decreasing slowly toward dawn and dusk. 
At very low sun angles, the NIP irradiance exceeds that
from the Eppleys, presumably because of the roll off in
the Eppley's cosine response at those angles.

Larger discrepancies arise between the NIP and and direct
beam calculated from the Eppleys during periods of sun
following rain events. Significant examples of this
phenomenon occurred on October 10 at 02 GMT and 05 GMT
and on October 13 at 20 GMT. In the latter case, the rain
had actually occurred the previous evening.  

We noticed another rain related peculiarity in the NIP
data.  On several occasions, when a rain event followed
a period of full sun, the NIP actually overshot zero and
went negative by about 10 watts (this is an estimated
value only) and persisted for several minutes.  Examples
occurred on October 16, 17, and 31.

In the morning, the sun is apparently blocked by a line
of trees until about 2030 GMT because large but very brief
discrepancies often occur at that time of day.  In the
afternoon, there is often convection over the main part
of Manus Island to the west which blocks the direct beam.

Another likely explanation is dew on the sensors.  I have
requested that the RESET team examine the sensors after
dawn during their next visit (February 1997).  This phenomenon
occurs on November 4, 12, 13, 15, 17, 19, 20, 22, 27, 28, 30.

Throughout the Manus record, there is a distinct tendency
for the sum of the direct plus diffuse SW to be greater than
the corresponding global PSP. The magnitude of the difference
on average fluctuates around 2-3%. There was an increase in
the average percent difference on about 19980509, roughly
corresponding with the reset visit.  However, the daily
average percent differences exhibit a large variability
around this mean, with a range from 0 - 8% for the period
19980509 - 19980731.  Since the beginning of data collection
rarely has the daily average difference been negative. While
differences of a few percent should be expected, I believe
that having these differences always biased warrants closer
scrutiny.  One would typically expect changes in these daily
average differences to be highly correlated with RESET visits,
which is not obvious in the data record, and to randomly switch
sign given a large enough sample size, which we don't have yet.
I recommend that we monitor this to make sure there's not an
unknown SMALL system grounding problem or Campbell logging
program glitch that is causing this bias.

• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Standard Deviation(down_short_diffuse_hemisp_std)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard
  Deviation(down_short_hemisp_std)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_short_hemisp_min)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Minima(down_short_diffuse_hemisp_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)

TWP/SKYRAD/C1 - PSP: Removal of shading arm

The shading arm for the SKYRAD shaded PSP was removed while instrument
comparisons were being performed by the ARCS RESET team.

• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Standard Deviation(down_short_diffuse_hemisp_std)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Minima(down_short_diffuse_hemisp_min)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)

TWP/SKYRAD/C1 - PSPs and NIP: Periods of shortwave radiometer discrepancies

The agreement between the NIP and the direct beam calculated from the
shaded and unshaded PSPs is usually within 5%. However, during these
periods there were larger discrepancies of 5-10%.

• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Standard Deviation(down_short_diffuse_hemisp_std)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard
  Deviation(down_short_hemisp_std)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_short_hemisp_min)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Minima(down_short_diffuse_hemisp_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)

TWP/SKYRAD/C1 - PSPs and NIP: Brief discrepancies, unknown cause

Observed anomalously large discrepancies between the NIP and the PSPs.

• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Standard Deviation(down_short_diffuse_hemisp_std)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard
  Deviation(down_short_hemisp_std)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_short_hemisp_min)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Minima(down_short_diffuse_hemisp_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)

TWP/SKYRAD/C1 - NIP: Moisture inside NIP

The NIP took on a significant amount of moisture during a rainy period
that ended on 970719.  From this date until the RESET visit in August,
the NIP data is corrupted.  The errors are large (often greater than
100 W/m^2 in the direct beam) in the morning but tend to converge to
the expected values in the afternoon.  In general, NIP data from this
period should be used with extreme caution.

• Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)

TWP/SKYRAD/C1 - NIP: Anomalously low values

The NIP appears to be reporting anomalously low values (based on
comparisons with other shortwave instruments).

• Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)

TWP/SKYRAD/GNDRAD/C1 - PSP: Configuration file problem

The following incorrect calibrations values were input into SKYRAD
and GNDRAD loggers:

               Values in Logger              Correct Values
            
               Responsivity  Cal Number       Responsivity  Cal number

PSPD_SKYRAD    8.31          120337           8.32          120192
PSPG_SKYRAD    8.46          118203           8.64          115741
PSPDn_GNDRAD   7.79          128370           7.90          126582

This error occured because several calibration coefficients are reported
and the wrong one was used.  The 45-55 degree (solar zenith angle range)
value should be used. At approximately 02 GMT on 19990304, these numbers
were corrected.

• PSP shaded minimum(psps_min)
• PSP shaded maximum(psps_max)
• PSP1 unshaded maximum(psp1_max)
• PSP1 unshaded minimum(psp1_min)
• PSP shaded mean(psps_mean)
• PSP1 unshaded standard deviation(psp1_sd)
• PSP shaded standard deviation(psps_sd)
• PSP1 unshaded mean(psp1_mean)

• PSP1 unshaded mean(psp1_mean)
• PSP1 unshaded minimum(psp1_min)
• PSP1 unshaded standard deviation(psp1_sd)
• PSP1 unshaded maximum(psp1_max)

• PSP1 unshaded mean(psp1_mean)
• PSP1 unshaded standard deviation(psp1_sd)
• PSP1 unshaded minimum(psp1_min)
• PSP1 unshaded maximum(psp1_max)

• PSP shaded mean(psps_mean)
• PSP shaded maximum(psps_max)
• PSP1 unshaded mean(psp1_mean)
• PSP1 unshaded maximum(psp1_max)
• PSP shaded minimum(psps_min)
• PSP1 unshaded standard deviation(psp1_sd)
• PSP shaded standard deviation(psps_sd)
• PSP1 unshaded minimum(psp1_min)

TWP/SKYRAD/C1 - PSP: Configuration file problem

The PSPG_SKYRAD calibration number was entered incorrectly as 11571, a
factor of 10 too low.  This error causes the SKYRAD global PSP to appear
to be too low by a factor of 10.  The error was corrected at approximately
23 GMT on 19990305.

• PSP shaded maximum(psps_max)
• PSP shaded minimum(psps_min)
• PSP1 unshaded maximum(psp1_max)
• PSP1 unshaded minimum(psp1_min)
• PSP shaded mean(psps_mean)
• PSP1 unshaded standard deviation(psp1_sd)
• PSP shaded standard deviation(psps_sd)
• PSP1 unshaded mean(psp1_mean)

• PSP shaded mean(psps_mean)
• PSP shaded maximum(psps_max)
• PSP1 unshaded mean(psp1_mean)
• PSP1 unshaded maximum(psp1_max)
• PSP shaded minimum(psps_min)
• PSP1 unshaded standard deviation(psp1_sd)
• PSP shaded standard deviation(psps_sd)
• PSP1 unshaded minimum(psp1_min)

TWP/SKYRAD/C2 - PIR offline in Nauru for B/W comparison

Shaded PIR disconnected so that side by side comparison could be made with shaded
PSP and new shaded B/W PSP

• Instantaneous PIR2 case thermistor(pir2_case_therm)
• Instantaneous PIR2 dome thermistor(pir2_dome_therm)

• PIR shaded standard deviation(pirs_sd)
• PIR shaded maximum(pirs_max)
• PIR shaded minimum(pirs_min)
• PIR shaded mean(pirs_mean)

• PIR shaded mean(pirs_mean)
• PIR shaded maximum(pirs_max)
• PIR shaded minimum(pirs_min)
• PIR shaded standard deviation(pirs_sd)

TWP/SKYRAD/C2 - Nauru solar tracker

During Reset7 (8/6) the skytracker firmware was upgraded for Y2K.  While still 
at the site, the mentor noted that the tracker was sticking and replaced it on 
8/8/99. The replacement tracker also failed.  Repeated attempts through 8/13 
were not successful.  After 8/13, the tracker was not operational.

It was found that the problem was the result of bugs in the Y2K compliant 
version (2.44) of the firmware.  On 10/14, Jeff Zirzow installed a new 
tracker with the Y2K non-compliant version (2.43) of the firmware.  It was
correctly assumed that the Y2K issues would only be apparent at the
19991231-20000101 time boundary.

Exact times of changes are not known; noon GMT (midnight Local) was used to
adequately window the time period of the changes.

• PIR shaded standard deviation(pirs_sd)
• PSP shaded maximum(psps_max)
• PSP shaded mean(psps_mean)
• PSP shaded minimum(psps_min)
• NIP maximum(nip_max)
• NIP mean(nip_mean)
• PSP shaded standard deviation(psps_sd)
• NIP standard deviation(nip_sd)
• PIR shaded maximum(pirs_max)
• PIR shaded minimum(pirs_min)
• NIP minimum(nip_min)
• PIR shaded mean(pirs_mean)

• NIP maximum(nip_max)
• PSP shaded mean(psps_mean)
• PIR shaded maximum(pirs_max)
• PIR shaded minimum(pirs_min)
• PIR shaded standard deviation(pirs_sd)
• PSP shaded maximum(psps_max)
• NIP standard deviation(nip_sd)
• PIR shaded mean(pirs_mean)
• NIP mean(nip_mean)
• PSP shaded standard deviation(psps_sd)
• PSP shaded minimum(psps_min)
• NIP minimum(nip_min)

TWP/SKYRAD/C1 - Solar tracker malfunction

The solar tracker malfunctioned and did not track the sun reliably
during this period.  This makes the PIR, PSP(now 848 Black/White),
and NIP data suspect.	

Note: the unshaded PIR is incorrectly named "shaded2" during this
time period.  It was not affected by the tracker malfunction.  The
improper naming is covered in a separate DQR.

• Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer1(inst_down_long_hemisp_shaded1_tp)
• Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
  Pyrgeometer1(inst_down_long_shaded1_dome_resist)
• Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
  Pyrgeometer1(inst_down_long_shaded1_case_resist)

• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Standard Deviation(down_short_diffuse_hemisp_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Maxima(down_long_hemisp_shaded1_max)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Standard
  Deviation(down_long_hemisp_shaded1_std)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Minima(down_short_diffuse_hemisp_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp_shaded1)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Minima(down_long_hemisp_shaded1_min)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Maxima(down_short_diffuse_hemisp_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)

TWP/SKYRAD/C2 - Solar tracker malfunction

The solar tracker malfunctioned and did not track the sun reliably during this period.  
This makes the PIR, PSP(now 848 Black/White), and NIP data suspect.

• Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
  Pyrgeometer(inst_down_long_shaded_dome_resist)
• Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
  Pyrgeometer(inst_down_long_shaded_case_resist)
• Instantaneous Downwelling Pyrgeometer Thermopile Voltage, Shaded Pyrgeometer(inst_down_long_hemisp_shaded_tp)

• Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)
• Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Minima(down_short_diffuse_hemisp_min)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Minima(down_long_hemisp_shaded_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Standard
  Deviation(down_long_hemisp_shaded_std)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Standard Deviation(down_short_diffuse_hemisp_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)

• Raw data stream - documentation not supported(Raw data stream - documentation not supported)

• Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Standard Deviation(down_short_diffuse_hemisp_std)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Maxima(down_short_diffuse_hemisp_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Standard
  Deviation(down_long_hemisp_shaded_std)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Minima(down_short_diffuse_hemisp_min)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Minima(down_long_hemisp_shaded_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)

TWP/SKYRAD/C2 - Solar tracker malfunction

The solar tracker malfunctioned and did not track the sun reliably during this period.  
This makes the shaded PIR, PSP(now 848 Black/White), and NIP data suspect.

• Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
  Pyrgeometer(inst_down_long_shaded_dome_resist)
• Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
  Pyrgeometer(inst_down_long_shaded_case_resist)
• Instantaneous Downwelling Pyrgeometer Thermopile Voltage, Shaded Pyrgeometer(inst_down_long_hemisp_shaded_tp)

• Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)
• Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Minima(down_short_diffuse_hemisp_min)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Minima(down_long_hemisp_shaded_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Standard
  Deviation(down_long_hemisp_shaded_std)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Standard Deviation(down_short_diffuse_hemisp_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)

• Raw data stream - documentation not supported(Raw data stream - documentation not supported)

• Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Standard Deviation(down_short_diffuse_hemisp_std)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Maxima(down_short_diffuse_hemisp_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Standard
  Deviation(down_long_hemisp_shaded_std)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Minima(down_short_diffuse_hemisp_min)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Minima(down_long_hemisp_shaded_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)

TWP/SKYRAD/C2 - Solar tracker malfunction

The solar tracker malfunctined and did not track the sun reliably during the
time period noted.  This makes the shaded PIR, shaded PSP(now 848 Black/White),
and the NIP data suspect.

• Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
  Pyrgeometer(inst_down_long_shaded_dome_resist)
• Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
  Pyrgeometer(inst_down_long_shaded_case_resist)
• Instantaneous Downwelling Pyrgeometer Thermopile Voltage, Shaded Pyrgeometer(inst_down_long_hemisp_shaded_tp)

• Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)
• Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Minima(down_short_diffuse_hemisp_min)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Minima(down_long_hemisp_shaded_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Standard
  Deviation(down_long_hemisp_shaded_std)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Standard Deviation(down_short_diffuse_hemisp_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)

• Raw data stream - documentation not supported(Raw data stream - documentation not supported)

• Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Standard Deviation(down_short_diffuse_hemisp_std)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Maxima(down_short_diffuse_hemisp_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Standard
  Deviation(down_long_hemisp_shaded_std)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Minima(down_short_diffuse_hemisp_min)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Minima(down_long_hemisp_shaded_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)

TWP/SKYRAD/C1 - Instrument replacement

SKYRAD instruments were replaced over a 1 hour period on 10/26/01 between 0:00 and 01:00.

• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Standard Deviation(down_short_diffuse_hemisp_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Standard
  Deviation(down_long_hemisp_shaded2_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Maxima(down_long_hemisp_shaded1_max)
• Sky/Cloud Infra-Red Temperature Minima(sky_ir_temp_min)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Minima(down_short_diffuse_hemisp_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp_shaded1)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard
  Deviation(down_short_hemisp_std)
• Downwelling Ultra-Violet Irradiance, UV Biometer(down_uvb)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_short_hemisp_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Minima(down_long_hemisp_shaded2_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp_shaded2)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Standard
  Deviation(down_long_hemisp_shaded1_std)
• Sky/Cloud Infra-Red Temperature Maxima(sky_ir_temp_max)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Minima(down_uvb_min)
• Sky/Cloud Infra-Red Temperature(sky_ir_temp)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Standard Deviation(down_uvb_std)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Maxima(down_long_hemisp_shaded2_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Minima(down_long_hemisp_shaded1_min)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Maxima(down_uvb_max)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
• Sky/Cloud Infra-Red Temperature Standard Deviation(sky_ir_temp_std)

TWP/C2  Installation

The Nauru ARCS was installed during the period September-November
1998.  Data were being collected by the end of October, but for the
first several weeks of November, the site was undergoing considerable
change, so data from that period should be used with caution.  The
official site dedication occured on November 20.  Most on-site
activity ended following the dedication so we will consider November
20 to be the beginning of the Nauru operations.  The last members of
the installation team left Nauru on November 24.

• north latitude for all the input platforms.(lat)
• Time offset of tweaks from base_time(time_offset)
• Instantaneous PIR2 case thermistor(pir2_case_therm)
• Instantaneous PIR1 uncorrected irradiance(pir1_uncorr_irradiance)
• Instantaneous PIR1 case thermistor(pir1_case_therm)
• Instantaneous PIR1 dome thermistor(pir1_dome_therm)
• altitude above sea levelaltunits(alt)
• Instantaneous PIR2 uncorrected irradiance(pir2_uncorr_irradiance)
• Instantaneous UVB temperature(uvb_temp)
• Instantaneous PIR2 dome thermistor(pir2_dome_therm)
• Instantaneous UVB uncorrected irradiance(uvb_uncorr_irradiance)
• Time offset from base_time(base_time)
• GPS raw data filename(filename)
• east longitude for all the input platforms.(lon)

• IRT1 maximum(irt1_max)
• east longitude for all the input platforms.(lon)
• PSP shaded mean(psps_mean)
• PSP shaded standard deviation(psps_sd)
• NIP standard deviation(nip_sd)
• PIR1 unshaded minimum(pir1_min)
• north latitude for all the input platforms.(lat)
• NIP minimum(nip_min)
• GPS raw data filename(filename)
• PIR shaded standard deviation(pirs_sd)
• PIR1 unshaded standard deviation(pir1_sd)
• PSP shaded maximum(psps_max)
• UVB standard deviation(uvb_sd)
• PSP shaded minimum(psps_min)
• UVB maximum(uvb_max)
• PIR shaded maximum(pirs_max)
• IRT1 minimum(irt1_min)
• PIR shaded minimum(pirs_min)
• PSP1 unshaded standard deviation(psp1_sd)
• PSP1 unshaded minimum(psp1_min)
• PIR shaded mean(pirs_mean)
• Internal voltage(internal_voltage)
• Time offset from base_time(base_time)
• altitude above sea levelaltunits(alt)
• NIP mean(nip_mean)
• PSP1 unshaded maximum(psp1_max)
• IRT1 mean(irt1_mean)
• Internal Logger Temperature(logger_temp)
• External voltage(external_voltage)
• PSP1 unshaded mean(psp1_mean)
• Time offset of tweaks from base_time(time_offset)
• NIP maximum(nip_max)
• UVB minimum(uvb_min)
• PIR1 unshaded mean(pir1_mean)
• UVB mean(uvb_mean)
• PIR1 unshaded maximum(pir1_max)
• IRT1 standard deviation(irt1_sd)
• Bit data. See details.(bit_data)

• Raw data stream - documentation not supported(Raw data stream - documentation not supported)

TWP/SKYRAD/C2 - reprocess: PIR identified as unshaded is really shaded

On 17Sep01 the Global PIR was moved from the unshaded position
on the Skyrad stand to the new 'shaded' spot on the new K&Z tracker.
It is still using the same Logger channel as it did as an unshaded 
PIR even though it is now shaded.

• Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer, Standard
  Deviation(down_long_hemisp_unshaded_std)
• Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer(down_long_hemisp_unshaded)
• Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer, Maxima(down_long_hemisp_unshaded_max)
• Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer, Minima(down_long_hemisp_unshaded_min)

TWP/SKYRAD/C3 - reprocess: PIR identified as unshaded is really shaded

From the initial installation of the Darwin SKYRAD
suite of instruments, two shaded PIRs were installed
rather than one shaded and one unshaded PIR as 
documented in the netcdf header information.

• Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer, Maxima(down_long_hemisp_unshaded_max)
• Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer, Standard
  Deviation(down_long_hemisp_unshaded_std)
• Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer(down_long_hemisp_unshaded)
• Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer, Minima(down_long_hemisp_unshaded_min)

TWP/SKYRAD/C2 - Reprocess: Incorrect UVB Calibration Coefficient

The uvb calibration coefficient was entered incorrectly as 0.2151
instead of 0.2332.

• Instantaneous Uncorrected Downwelling Ultraviolet Irradiance, UV Biometer(inst_down_uvb_irradiance)

• Downwelling Ultra-Violet Irradiance, UV Biometer, Minima(down_uvb_min)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Standard Deviation(down_uvb_std)
• Downwelling Ultra-Violet Irradiance, UV Biometer(down_uvb)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Maxima(down_uvb_max)

• Downwelling Ultra-Violet Irradiance, UV Biometer, Maxima(down_uvb_max)
• Downwelling Ultra-Violet Irradiance, UV Biometer(down_uvb)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Minima(down_uvb_min)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Standard Deviation(down_uvb_std)

TWP/SKYRAD/C2 - UVB Data questionable/incorrect due to uncontrolled sensor temperature

The UVB was not temperature controlled to 25C as required
to ensure accurate data.  UVB data should ONLY be used after 
checking both the bit_data and twpskyrad20sC1.a1 uvb_temp
or inst_down_uvb_temp.  UVB data where the UVB temperature
was outside the range of 24-26C should not be used.

• Instantaneous Uncorrected Downwelling Ultraviolet Irradiance, UV Biometer(inst_down_uvb_irradiance)
• Instantaneous UVB uncorrected irradiance(uvb_uncorr_irradiance)
• Instantaneous Downwelling Ultraviolet Biometer Temperature(inst_down_uvb_temp)
• Instantaneous UVB temperature(uvb_temp)

• UVB standard deviation(uvb_sd)
• Downwelling Ultra-Violet Irradiance, UV Biometer(down_uvb)
• UVB maximum(uvb_max)
• UVB minimum(uvb_min)
• UVB mean(uvb_mean)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Minima(down_uvb_min)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Standard Deviation(down_uvb_std)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Maxima(down_uvb_max)

• UVB standard deviation(uvb_sd)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Maxima(down_uvb_max)
• Downwelling Ultra-Violet Irradiance, UV Biometer(down_uvb)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Minima(down_uvb_min)
• UVB mean(uvb_mean)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Standard Deviation(down_uvb_std)
• UVB maximum(uvb_max)
• UVB minimum(uvb_min)

TWP/SKYRAD/C2  - IRT incorrect min/delta values

For field sky_ir_temp, the value of valid_min was incorrectly assigned to -49.7 C and no 
value of valid_delta was assigned. The actual values should be -60 and 50 C, respectively.

• Sky/Cloud Infra-Red Temperature Minima(sky_ir_temp_min)
• Sky/Cloud Infra-Red Temperature Maxima(sky_ir_temp_max)
• Sky/Cloud Infra-Red Temperature(sky_ir_temp)

TWP/SKYRAD/C3  - IRT incorrect min/delta values

For field sky_ir_temp, the value of valid_min was incorrectly assigned to -49.7 C and no 
value of valid_delta was assigned. The actual values should be -60 and 50 C, respectively.

• Sky/Cloud Infra-Red Temperature Minima(sky_ir_temp_min)
• Sky/Cloud Infra-Red Temperature(sky_ir_temp)
• Sky/Cloud Infra-Red Temperature Maxima(sky_ir_temp_max)

TWP/SKYRAD/C2 - Tracker Problem

The observers reported that the tracker was not shading the radiometers.
The sun sensor was damaged by moisture due to a missing front window.  The tracker had 
been in sun-sensing mode so required the sensor to maintain its proper orientation.  Troy 
Culgan placed the tracker in time-track mode (calculates solar position based on time, 
date, and location) until the sun sensor can be repaired.

• Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp_shaded1)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Minima(down_long_hemisp_shaded2_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Standard
  Deviation(down_long_hemisp_shaded2_std)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp_shaded2)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Standard
  Deviation(down_long_hemisp_shaded1_std)
• Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Maxima(down_long_hemisp_shaded2_max)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Maxima(down_long_hemisp_shaded1_max)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Minima(down_long_hemisp_shaded1_min)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Standard Deviation(down_short_diffuse_hemisp_std)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Minima(down_short_diffuse_hemisp_min)

• Raw data stream - documentation not supported(Raw data stream - documentation not supported)

TWP/SKYRAD/C1 - IRT affected by rain or shutter

During this time period, the SKYRAD IRT was affected by rain
events.  Water collected on the IRT lens resulting in
elevated and invalid measurement of the sky brightness
temperature.  If the front optic was not dried after a heavy
rain, the data contamination could persist for several days.

The original solution to the problem was to have the local
observers clean the front lens after rains.  In April 1998,
a rain shutter was installed, but it did not become fully 
functional until Aug 9, 1998.

After the rain shutter was installed, the IRT data was
invalid during rain events while the shutter was closed
but ok again immediately after the shutter re-opened.

The configuration of the IRT was changed Oct 19, 2001.
The IRT was mounted such that the field of view is directed
downward at a 30 degree elevation angle and reflected
to the vertical by a front-surfaced, gold-plated mirror.
This configuration prevents rain from directly striking
the lens and collecting in the lens barrel.

Data from 10/96-3/99 were examined and times when the
data are invalid are identified below.  Data from 4/99-10/01
also contain periods of invalid data, but it is left to
the data users to identify those periods and filter the
data according to their needs.

10/12/96 21:00 - 10/14/96 00:00
10/16/96 13:00 - 10/16/96 21:00
10/21/96 04:00 - 10/21/96 23:00
11/09/96 06:00 - 11/09/96 22:00
11/10/96 08:00 - 11/11/96 03:00
11/23/96 17:00 - 11/24/96 03:00
11/25/96 00:00 - 11/25/96 14:00
12/06/96 17:00 - 12/06/96 22:00
12/07/96 01:00 - 12/07/96 06:00
12/11/96 21:00 - 12/11/96 23:00
12/12/96 05:00 - 12/12/96 18:00
12/16/96 03:00 - 12/16/96 23:00
12/19/96 02:00 - 12/20/96 03:00
12/21/96 10:00 - 12/22/96 03:00
12/22/96 20:00 - 12/23/96 07:00
12/27/96 01:00 - 12/27/96 11:00
12/30/96 06:00 - 12/30/96 23:00
01/01/97 21:00 - 01/02/97 01:00
01/10/97 01:00 - 01/10/97 09:00
01/12/97 06:00 - 01/12/97 23:59
01/14/97 01:00 - 01/15/97 23:00
01/17/97 01:00 - 01/17/97 10:00
01/18/97 18:00 - 01/18/97 23:59
01/19/97 17:00 - 01/19/97 23:00
01/20/97 10:00 - 01/21/97 02:00
01/27/97 15:00 - 01/27/97 23:59
01/30/97 16:00 - 01/30/97 23:59
02/01/97 03:00 - 02/01/97 13:00
02/02/97 05:00 - 02/03/97 01:00
02/09/97 00:00 - 02/09/97 03:00
02/10/97 04:00 - 02/11/97 07:00
02/12/97 11:00 - 02/12/97 22:00
02/15/97 00:00 - 02/15/97 03:00
02/16/97 06:00 - 02/16/97 20:00
02/17/97 10:00 - 02/18/97 01:00
02/18/97 04:00 - 02/19/97 23:00
02/24/97 00:00 - 02/24/97 21:00
02/25/97 03:00 - 02/25/97 09:00
02/26/97 01:00 - 02/26/97 07:00
03/01/97 01:00 - 03/01/97 12:00
03/26/97 01:00 - 03/27/97 03:00
04/07/97 13:00 - 04/08/97 02:00
04/11/97 03:00 - 04/11/97 06:00
04/12/97 00:00 - 04/12/97 05:00
04/12/97 12:00 - 04/12/97 18:00
04/15/97 15:00 - 04/15/97 19:00
04/15/97 22:00 - 04/16/97 10:00
04/16/97 12:00 - 04/16/97 23:59
04/22/97 15:00 - 04/22/97 21:00
04/27/97 18:00 - 04/27/97 21:00
04/29/97 13:00 - 04/29/97 20:00
05/01/97 04:00 - 05/01/97 23:00
05/03/97 03:00 - 05/03/97 20:00
05/13/97 13:00 - 05/14/97 23:00
05/16/97 19:00 - 05/16/97 23:59
05/18/97 06:00 - 05/18/97 21:00
05/20/97 02:00 - 05/20/97 21:00
05/22/97 02:00 - 05/22/97 21:00
05/25/97 03:00 - 05/25/97 23:00
05/26/97 04:00 - 05/26/97 11:00
05/27/97 04:00 - 05/27/97 07:00
06/24/97 13:00 - 06/24/97 21:00
06/30/97 19:00 - 07/01/97 06:00
07/04/97 03:00 - 07/04/97 23:59
07/07/97 15:00 - 07/08/97 20:00
07/11/97 13:00 - 07/11/97 21:00
07/12/97 10:00 - 07/12/97 20:00
07/15/97 19:00 - 07/16/97 21:00
07/17/97 18:00 - 07/18/97 05:00
07/18/97 12:00 - 07/19/97 21:00
07/21/97 06:00 - 07/21/97 23:00
08/06/97 21:00 - 08/07/97 07:00
08/07/97 15:00 - 08/07/97 23:00
08/26/97 08:00 - 08/26/97 17:00
09/23/97 20:00 - 09/23/97 21:00
09/25/97 04:00 - 09/25/97 09:00
09/25/97 21:00 - 09/25/97 23:59
10/01/97 03:00 - 10/01/97 06:00
10/12/97 02:00 - 10/12/97 05:00
10/12/97 08:00 - 10/12/97 22:00
10/13/97 06:00 - 10/13/97 17:00
10/22/97 02:00 - 10/22/97 05:00
10/25/97 22:00 - 10/26/97 05:00
10/27/97 07:00 - 10/27/97 23:00
11/02/97 00:00 - 11/02/97 23:59
11/16/97 04:00 - 11/16/97 08:00
11/16/97 18:00 - 11/16/97 22:00
11/18/97 15:00 - 11/18/97 22:00
11/30/97 03:00 - 11/30/97 20:00
12/17/97 18:00 - 12/18/97 23:00
12/21/97 03:00 - 12/21/97 05:00
12/25/97 02:00 - 12/25/97 08:00
12/26/97 18:00 - 12/27/97 01:00
12/28/97 01:00 - 12/28/97 20:00
12/30/97 09:00 - 12/30/97 23:00
01/03/98 04:00 - 01/03/98 05:00
01/04/98 05:00 - 01/05/98 02:00
02/04/98 19:00 - 02/04/98 23:00
02/05/98 04:00 - 02/06/98 19:00
02/07/98 16:00 - 02/08/98 03:00
02/08/98 12:00 - 02/08/98 21:00
02/09/98 06:00 - 02/10/98 04:00
02/20/98 19:00 - 02/20/98 23:59
02/22/98 09:00 - 02/22/98 21:00
03/16/98 00:00 - 03/16/98 02:00
03/17/98 19:00 - 03/17/98 23:59
03/28/98 15:00 - 03/31/98 03:00
03/31/98 10:00 - 03/31/98 22:00
04/01/98 00:00 - 04/01/98 03:18
04/01/98 06:45 - 04/01/98 10:06
04/02/98 00:28 - 04/05/98 03:45
04/05/98 19:25 - 04/05/98 23:54
04/09/98 00:45 - 04/09/98 16:54
04/10/98 15:15 - 04/10/98 19:28
04/11/98 04:24 - 04/11/98 05:34
04/11/98 06:56 - 04/11/98 23:28
04/12/98 00:15 - 04/12/98 01:56
04/12/98 04:15 - 04/12/98 05:37
04/12/98 15:37 - 04/12/98 16:57
04/12/98 17:15 - 04/12/98 21:37
04/13/98 01:37 - 04/13/98 14:45
04/19/98 05:25 - 04/19/98 06:08
04/19/98 20:15 - 04/19/98 22:15
04/21/98 08:57 - 04/22/98 03:45
04/23/98 21:45 - 04/23/98 21:56
04/27/98 17:56 - 04/27/98 22:08
04/28/98 05:45 - 04/28/98 20:36
04/28/98 23:45 - 04/29/98 05:58
04/30/98 10:57 - 04/30/98 21:58
05/01/98 08:08 - 05/02/98 00:08
05/02/98 07:45 - 05/02/98 22:08
05/03/98 08:35 - 05/03/98 22:55
05/04/98 08:16 - 05/04/98 21:55
05/05/98 07:33 - 05/05/98 22:08
05/06/98 07:55 - 05/06/98 22:07
05/07/98 07:55 - 05/07/98 12:33
05/07/98 13:08 - 05/07/98 22:26
05/08/98 02:45 - 05/08/98 03:08
05/08/98 03:34 - 05/08/98 04:16
05/09/98 02:26 - 05/09/98 02:56
05/09/98 20:55 - 05/09/98 21:08
05/09/98 21:45 - 05/09/98 23:35
05/10/98 15:45 - 05/10/98 18:35
05/11/98 22:08 - 05/11/98 22:45
05/12/98 01:34 - 05/12/98 02:26
05/12/98 13:09 - 05/12/98 20:45
05/13/98 00:25 - 05/13/98 04:28
05/13/98 11:15 - 05/13/98 12:57
05/13/98 13:26 - 05/13/98 18:19
05/13/98 19:45 - 05/14/98 22:08
05/16/98 00:15 - 05/16/98 05:15
05/16/98 07:04 - 05/17/98 01:55
05/17/98 05:25 - 05/17/98 06:33
05/19/98 21:16 - 05/19/98 22:16
05/19/98 22:57 - 05/19/98 23:35
05/21/98 16:57 - 05/21/98 21:15
05/21/98 23:56 - 05/22/98 00:45
05/22/98 01:25 - 05/22/98 02:04
05/22/98 19:15 - 05/22/98 21:56
05/23/98 06:25 - 05/23/98 07:07
05/24/98 06:25 - 05/24/98 07:45
05/24/98 10:45 - 05/24/98 21:33
05/25/98 07:57 - 05/25/98 17:26
05/26/98 19:15 - 05/27/98 00:26
05/27/98 04:35 - 05/27/98 12:26
05/29/98 12:05 - 05/29/98 22:15
05/30/98 01:25 - 05/30/98 02:04
06/01/98 15:57 - 06/01/98 21:45
06/02/98 04:15 - 06/02/98 23:34
06/03/98 04:55 - 06/03/98 05:45
06/03/98 07:45 - 06/03/98 11:17
06/03/98 20:58 - 06/03/98 22:58
06/04/98 01:45 - 06/04/98 02:03
06/04/98 07:45 - 06/04/98 09:15
06/04/98 20:29 - 06/04/98 21:15
06/05/98 02:15 - 06/05/98 03:26
06/05/98 05:15 - 06/05/98 13:26
06/05/98 15:26 - 06/06/98 00:05
06/06/98 08:35 - 06/06/98 20:35
06/06/98 21:56 - 06/06/98 22:26
06/07/98 06:45 - 06/07/98 13:45
06/07/98 20:57 - 06/07/98 23:45
06/08/98 00:29 - 06/08/98 01:29
06/08/98 19:29 - 06/08/98 20:58
06/09/98 03:25 - 06/09/98 03:45
06/09/98 06:35 - 06/09/98 06:58
06/09/98 15:42 - 06/09/98 16:58
06/10/98 09:35 - 06/10/98 21:34
06/13/98 02:25 - 06/14/98 03:05
06/13/98 04:45 - 06/13/98 05:26
06/13/98 20:06 - 06/13/98 23:25
06/13/98 23:45 - 06/14/98 00:15
06/14/98 03:25 - 06/14/98 03:45
06/14/98 15:15 - 06/14/98 18:24
06/14/98 20:55 - 06/14/98 21:15
06/16/98 18:34 - 06/16/98 22:36
06/17/98 06:55 - 06/17/98 08:04
06/17/98 09:54 - 06/17/98 10:26
06/18/98 04:26 - 06/18/98 05:05
06/18/98 05:45 - 06/18/98 07:26
06/18/98 12:58 - 06/18/98 13:16
06/18/98 14:15 - 06/18/98 23:56
06/19/98 00:26 - 06/19/98 00:56
06/19/98 02:15 - 06/19/98 03:04
06/19/98 03:25 - 06/19/98 06:56
06/19/98 07:25 - 06/19/98 08:56
06/19/98 11:45 - 06/20/98 13:46
06/20/98 16:29 - 06/20/98 20:45
06/20/98 23:58 - 06/21/98 01:15
06/22/98 03:45 - 06/22/98 04:34
06/22/98 05:45 - 06/22/98 16:34
06/22/98 19:45 - 06/23/98 01:05
06/23/98 02:04 - 06/23/98 02:55
06/23/98 03:45 - 06/23/98 05:05
06/23/98 05:45 - 06/23/98 07:17
06/23/98 22:06 - 06/24/98 16:25
06/24/98 22:36 - 06/24/98 23:25
06/25/98 00:05 - 06/25/98 00:34
06/27/98 00:55 - 06/27/98 01:16
06/27/98 05:45 - 06/27/98 06:05
06/27/98 21:25 - 06/28/98 08:05
06/28/98 12:26 - 06/28/98 13:45
06/30/98 10:58 - 06/30/98 13:05
06/30/98 13:15 - 06/30/98 17:45
06/30/98 18:15 - 06/30/98 21:45
07/01/98 08:26 - 07/01/98 22:05
07/02/98 11:33 - 07/02/98 21:33
07/03/98 17:33 - 07/03/98 21:45
07/04/98 15:57 - 07/04/98 16:45
07/04/98 21:57 - 07/04/98 22:25
07/05/98 07:15 - 07/05/98 22:56
07/05/98 23:05 - 07/06/98 00:05
07/06/98 03:54 - 07/06/98 06:04
07/06/98 07:04 - 07/06/98 10:04
07/06/98 16:45 - 07/06/98 21:15
07/07/98 04:56 - 07/07/98 05:56
07/07/98 06:26 - 07/07/98 06:56
07/07/98 07:45 - 07/07/98 08:34
07/08/98 01:45 - 07/08/98 02:34
07/08/98 02:56 - 07/08/98 03:27
07/08/98 08:26 - 07/08/98 15:08
07/08/98 16:06 - 07/08/98 16:45
07/08/98 17:28 - 07/08/98 19:28
07/09/98 15:55 - 07/09/98 18:03
07/09/98 21:25 - 07/09/98 22:25
07/09/98 23:05 - 07/09/98 23:45
07/10/98 02:25 - 07/10/98 03:58
07/10/98 23:29 - 07/10/98 23:45
07/12/98 09:25 - 07/12/98 09:45
07/12/98 10:25 - 07/12/98 21:15
07/13/98 01:34 - 07/13/98 02:15
07/13/98 04:15 - 07/13/98 04:26
07/13/98 10:15 - 07/13/98 13:57
07/13/98 15:45 - 07/13/98 21:05
07/14/98 02:25 - 07/14/98 02:35
07/14/98 03:15 - 07/14/98 06:25
07/14/98 12:56 - 07/14/98 17:05
07/15/98 03:25 - 07/15/98 05:25
07/15/98 18:15 - 07/15/98 19:55
07/15/98 20:55 - 07/15/98 22:35
07/16/98 03:25 - 07/16/98 06:15
07/16/98 08:35 - 07/16/98 12:15
07/16/98 15:04 - 07/16/98 23:25
07/17/98 10:55 - 07/17/98 13:25
07/19/98 03:35 - 07/19/98 09:15
07/19/98 10:57 - 07/19/98 14:26
07/19/98 15:35 - 07/19/98 18:26
07/19/98 19:55 - 07/19/98 21:15
07/19/98 21:25 - 07/19/98 21:45
07/20/98 01:45 - 07/20/98 02:04
07/20/98 10:15 - 07/20/98 11:45
07/20/98 12:04 - 07/20/98 13:04
07/20/98 16:04 - 07/20/98 22:25
07/20/98 16:05 - 07/20/98 22:25
07/20/98 22:45 - 07/20/98 23:25
07/21/98 01:15 - 07/21/98 01:57
07/21/98 02:34 - 07/21/98 03:45
07/21/98 04:26 - 07/21/98 05:45
07/21/98 06:57 - 07/21/98 07:04
07/21/98 11:45 - 07/21/98 12:35
07/22/98 01:15 - 07/22/98 03:45
07/22/98 05:45 - 07/22/98 22:35
07/22/98 23:35 - 07/23/98 03:15
07/23/98 05:15 - 07/23/98 09:35
07/23/98 17:45 - 07/23/98 19:56
07/23/98 20:45 - 07/23/98 21:56
07/24/98 01:26 - 07/24/98 01:45
07/24/98 04:26 - 07/24/98 04:45
07/24/98 10:15 - 07/24/98 12:15
07/24/98 12:35 - 07/24/98 16:45
07/25/98 07:03 - 07/25/98 13:26
07/26/98 04:25 - 07/26/98 04:45
07/26/98 13:57 - 07/26/98 18:15
07/27/98 09:45 - 07/27/98 09:58
07/27/98 12:05 - 07/28/98 10:25
07/28/98 23:26 - 07/29/98 00:05
07/29/98 00:45 - 07/29/98 01:08
07/29/98 04:58 - 07/29/98 05:26
07/29/98 06:05 - 07/29/98 07:45
07/29/98 16:57 - 07/29/98 18:35
07/30/98 02:45 - 07/30/98 03:45
07/30/98 19:57 - 07/31/98 00:24
07/31/98 07:15 - 07/31/98 08:35
07/31/98 09:04 - 07/31/98 09:45
07/31/98 12:25 - 07/31/98 13:45
08/01/98 00:00 - 08/01/98 00:15
08/01/98 03:15 - 08/01/98 23:05
08/04/98 15:56 - 08/04/98 16:45
08/05/98 06:56 - 08/05/98 07:45
08/06/98 06:45 - 08/06/98 07:15
08/06/98 14:45 - 08/06/98 17:04
08/07/98 05:33 - 08/07/98 07:33
08/09/98 04:15 - 08/09/98 05:33
08/09/98 07:33 - 08/09/98 07:56
08/10/98 19:57 - 08/10/98 21:35
08/11/98 10:04 - 08/11/98 10:15
08/12/98 08:04 - 08/12/98 09:55
08/13/98 16:15 - 08/13/98 16:45
08/14/98 22:04 - 08/14/98 22:15
08/15/98 02:04 - 08/15/98 02:55
08/15/98 04:15 - 08/15/98 04:45
08/15/98 05:25 - 08/15/98 05:45
08/15/98 15:35 - 08/15/98 15:45
08/18/98 07:15 - 08/18/98 07:35
08/18/98 09:15 - 08/18/98 10:27
08/18/98 14:45 - 08/18/98 17:05
08/19/98 15:54 - 08/20/98 10:15
08/27/98 22:10 - 08/28/98 00:45
08/28/98 04:05 - 08/28/98 05:25
09/02/98 05:05 - 09/02/98 05:15
09/03/98 03:15 - 09/03/98 03:25
09/03/98 10:55 - 09/03/98 11:04
09/05/98 20:04 - 09/05/98 21:35
09/07/98 09:45 - 09/07/98 10:05
09/07/98 21:45 - 09/07/98 22:15
09/09/98 05:04 - 09/09/98 06:04
09/09/98 07:35 - 09/09/98 08:45
09/09/98 20:57 - 09/10/98 00:33
09/10/98 06:15 - 09/10/98 07:04
09/10/98 13:55 - 09/10/98 14:24
09/12/98 14:34 - 09/12/98 15:15
09/12/98 17:05 - 09/12/98 17:35
09/13/98 16:55 - 09/13/98 17:04
09/14/98 06:04 - 09/14/98 06:25
09/15/98 08:55 - 09/15/98 09:15
09/15/98 19:45 - 09/15/98 20:55
09/17/98 01:35 - 09/17/98 03:15
09/17/98 08:15 - 09/17/98 09:04
09/17/98 12:55 - 09/17/98 14:04
09/17/98 21:55 - 09/17/98 23:24
09/18/98 11:15 - 09/18/98 12:55
09/18/98 14:45 - 09/18/98 16:55
09/21/98 03:34 - 09/21/98 06:45
09/21/98 15:56 - 09/21/98 16:45
09/21/98 19:04 - 09/22/98 20:55
09/22/98 22:25 - 09/22/98 23:24
09/23/98 03:56 - 09/23/98 05:15
09/23/98 16:04 - 09/23/98 17:15
09/23/98 20:55 - 09/24/98 01:25
09/24/98 02:55 - 09/24/98 03:35
09/24/98 04:25 - 09/24/98 05:56
09/26/98 02:15 - 09/26/98 03:35
09/26/98 08:15 - 09/26/98 08:35
09/26/98 08:45 - 09/26/98 13:24
09/27/98 13:05 - 09/27/98 13:24
09/28/98 03:26 - 09/28/98 03:55
09/29/98 05:45 - 09/29/98 06:15
09/29/98 11:04 - 09/29/98 11:55
09/29/98 19:34 - 09/29/98 21:25
09/30/98 00:05 - 09/30/98 03:15
09/30/98 14:35 - 10/01/98 13:24
10/01/98 14:45 - 10/01/98 16:25
10/02/98 20:45 - 10/02/98 21:35
10/04/98 00:15 - 10/04/98 01:15
10/04/98 02:25 - 10/04/98 08:35
10/05/98 13:15 - 10/05/98 16:57
10/06/98 16:45 - 10/06/98 18:57
10/06/98 21:45 - 10/06/98 22:57
10/08/98 02:15 - 10/08/98 02:45
10/09/98 19:04 - 10/09/98 20:15
10/13/98 01:55 - 10/13/98 03:15
10/15/98 05:55 - 10/15/98 06:35
10/16/98 04:04 - 10/16/98 04:35
10/16/98 22:36 - 10/17/98 00:45
10/17/98 07:24 - 10/17/98 09:15
10/19/98 10:55 - 10/19/98 11:15
10/20/98 03:15 - 10/20/98 04:25
10/23/98 14:45 - 10/23/98 15:15
10/24/98 18:25 - 10/24/98 18:45
10/25/98 00:36 - 10/25/98 00:57
10/25/98 05:15 - 10/25/98 05:24
10/28/98 08:05 - 10/28/98 15:25
10/29/98 06:05 - 10/29/98 06:35
10/29/98 16:15 - 10/29/98 16:55
10/29/98 20:35 - 10/29/98 21:15
10/31/98 11:45 - 10/31/98 15:24
11/01/98 21:35 - 11/01/98 21:45
11/04/98 09:57 - 11/04/98 10:57
11/04/98 11:15 - 11/04/98 12:26
11/05/98 02:34 - 11/05/98 06:00
11/05/98 16:05 - 11/06/98 00:30
11/07/98 11:15 - 11/07/98 11:35
11/07/98 19:24 - 11/07/98 19:57
11/08/98 04:04 - 11/08/98 04:45
11/10/98 02:45 - 11/10/98 03:00
11/10/98 05:00 - 11/10/98 05:30
11/16/98 04:35 - 11/16/98 06:45
11/17/98 01:05 - 11/17/98 06:35
11/17/98 23:24 - 11/18/98 00:45
11/18/98 03:06 - 11/18/98 03:30
11/19/98 00:45 - 11/19/98 01:15
11/19/98 02:04 - 11/19/98 05:36
11/19/98 15:35 - 11/19/98 16:35
11/20/98 00:35 - 11/21/98 01:57
11/21/98 03:24 - 11/21/98 09:05
11/21/98 22:54 - 11/22/98 00:45
11/22/98 23:45 - 11/23/98 02:05
11/23/98 04:54 - 11/23/98 09:00
11/24/98 03:15 - 11/24/98 04:15
11/27/98 07:45 - 11/27/98 08:35
11/28/98 06:24 - 11/28/98 07:15
11/29/98 02:45 - 11/29/98 07:55
11/30/98 20:45 - 11/30/98 21:45
12/01/98 03:35 - 12/01/98 04:15
12/01/98 14:55 - 12/01/98 22:45
12/02/98 02:35 - 12/02/98 13:05
12/02/98 21:15 - 12/02/98 22:15
12/03/98 00:24 - 12/04/98 00:45
12/04/98 06:15 - 12/04/98 06:57
12/04/98 23:55 - 12/05/98 00:45
12/05/98 11:35 - 12/05/98 12:35
12/05/98 16:25 - 12/05/98 17:35
12/05/98 19:15 - 12/06/98 17:35
12/06/98 22:35 - 12/07/98 09:25
12/07/98 12:05 - 12/07/98 13:35
12/07/98 21:45 - 12/08/98 01:15
12/09/98 00:25 - 12/09/98 00:55
12/10/98 02:45 - 12/10/98 04:15
12/11/98 02:55 - 12/11/98 05:36
12/11/98 17:35 - 12/11/98 17:55
12/12/98 00:25 - 12/12/98 17:25
12/12/98 20:05 - 12/12/98 20:56
12/12/98 22:55 - 12/12/98 23:25
12/13/98 00:15 - 12/13/98 00:35
12/13/98 01:35 - 12/13/98 04:25
12/13/98 20:24 - 12/14/98 08:45
12/14/98 14:24 - 12/15/98 21:54
12/17/98 05:35 - 12/17/98 05:45
12/21/98 06:35 - 12/21/98 07:24
12/23/98 17:35 - 12/23/98 18:35
12/24/98 18:25 - 12/24/98 18:45
12/25/98 01:45 - 12/25/98 02:25
12/25/98 04:35 - 12/25/98 14:15
12/25/98 19:15 - 12/25/98 19:55
12/26/98 01:55 - 12/26/98 06:45
12/26/98 17:45 - 12/26/98 18:15
12/27/98 16:15 - 12/27/98 16:35
12/27/98 17:55 - 12/27/98 20:55
12/28/98 13:15 - 12/28/98 13:55
12/28/98 18:15 - 12/28/98 20:55
12/29/98 05:15 - 12/29/98 06:04
12/30/98 03:24 - 12/30/98 05:55
12/30/98 07:15 - 12/30/98 09:15
12/31/98 02:30 - 12/31/98 23:59
01/01/99 00:05 - 01/01/99 01:56
01/01/99 10:15 - 01/01/99 10:45
01/01/99 21:35 - 01/01/99 22:45
01/02/99 00:07 - 01/02/99 00:35
01/02/99 03:35 - 01/02/99 10:25
01/02/99 17:05 - 01/02/99 20:15
01/03/99 08:35 - 01/03/99 08:45
01/03/99 10:24 - 01/03/99 11:04
01/03/99 12:55 - 01/03/99 14:35
01/04/99 13:24 - 01/04/99 13:57
01/05/99 04:45 - 01/05/99 05:05
01/07/99 07:45 - 01/07/99 08:04
01/09/99 21:55 - 01/09/99 22:15
01/10/99 04:15 - 01/10/99 06:35
01/10/99 07:25 - 01/10/99 07:35
01/10/99 08:05 - 01/10/99 08:15
01/15/99 09:15 - 01/15/99 09:24
01/15/99 14:45 - 01/15/99 15:45
01/16/99 04:55 - 01/16/99 06:05
01/18/99 05:55 - 01/18/99 07:15
01/18/99 17:15 - 01/18/99 17:35
01/18/99 20:05 - 01/18/99 20:15
01/19/99 05:03 - 01/19/99 05:15
01/19/99 13:45 - 01/19/99 13:55
01/19/99 15:24 - 01/19/99 15:34
01/19/99 17:05 - 01/19/99 17:45
01/19/99 20:35 - 01/19/99 22:35
01/20/99 03:05 - 01/20/99 03:24
01/20/99 03:55 - 01/20/99 19:45
01/21/99 05:55 - 01/21/99 10:35
01/21/99 14:45 - 01/21/99 17:55
01/21/99 19:35 - 01/21/99 21:15
01/21/99 22:57 - 01/22/99 18:45
01/22/99 22:45 - 01/23/99 00:04
01/23/99 02:24 - 01/23/99 04:45
01/23/99 05:15 - 01/23/99 06:05
01/24/99 13:45 - 01/24/99 15:15
01/25/99 17:24 - 01/25/99 18:24
01/25/99 23:45 - 01/26/99 00:15
01/29/99 22:56 - 01/29/99 23:15
01/30/99 07:04 - 01/30/99 07:45
01/30/99 16:35 - 01/30/99 16:45
01/30/99 19:55 - 01/30/99 23:15
01/31/99 00:55 - 01/31/99 01:35
01/31/99 02:55 - 01/31/99 03:24
01/31/99 06:55 - 01/31/99 08:24
01/31/99 15:55 - 01/31/99 16:15
01/31/99 17:55 - 01/31/99 18:25
01/31/99 21:35 - 02/01/99 05:25
02/01/99 13:15 - 02/01/99 13:55
02/01/99 18:45 - 02/01/99 19:04
02/03/99 03:34 - 02/03/99 04:55
02/03/99 08:24 - 02/03/99 08:45
02/03/99 16:55 - 02/03/99 21:45
02/03/99 23:45 - 02/04/99 03:15
02/04/99 15:15 - 02/04/99 15:24
02/04/99 21:55 - 02/05/99 15:55
02/06/99 14:45 - 02/06/99 15:15
02/07/99 02:15 - 02/07/99 02:35
02/08/99 09:24 - 02/08/99 17:15
02/08/99 22:05 - 02/09/99 13:45
02/09/99 19:05 - 02/09/99 19:35
02/10/99 03:05 - 02/10/99 07:05
02/12/99 00:25 - 02/12/99 04:05
02/13/99 20:55 - 02/14/99 09:15
02/14/99 22:05 - 02/14/99 22:45
02/14/99 23:25 - 02/14/99 23:45
02/15/99 04:55 - 02/15/99 05:25
02/15/99 08:45 - 02/16/99 04:05
02/17/99 15:45 - 02/17/99 16:24
02/18/99 01:05 - 02/18/99 01:15
02/18/99 02:15 - 02/18/99 02:25
02/20/99 06:55 - 02/20/99 07:15
02/20/99 22:55 - 02/20/99 23:25
02/21/99 03:24 - 02/21/99 04:05
02/21/99 15:24 - 02/21/99 17:05
02/21/99 19:05 - 02/21/99 20:24
02/21/99 21:55 - 02/21/99 22:35
02/22/99 00:45 - 02/22/99 01:45
02/22/99 05:55 - 02/22/99 07:15
02/22/99 11:45 - 02/22/99 12:15
02/22/99 13:35 - 02/22/99 13:55
02/22/99 14:24 - 02/22/99 14:45
02/24/99 07:35 - 02/24/99 07:45
02/24/99 16:56 - 02/25/99 05:55
02/25/99 22:45 - 02/25/99 23:55
02/26/99 02:15 - 02/26/99 03:04
02/26/99 04:45 - 02/26/99 05:15
03/01/99 23:45 - 03/02/99 00:55
03/02/99 04:45 - 03/02/99 04:55
03/03/99 01:35 - 03/03/99 02:15
03/03/99 11:35 - 03/03/99 13:15
03/03/99 14:45 - 03/03/99 16:45
03/03/99 21:05 - 03/03/99 21:15
03/05/99 16:45 - 03/05/99 17:05
03/05/99 19:35 - 03/06/99 01:55
03/06/99 10:15 - 03/06/99 10:25
03/06/99 14:24 - 03/06/99 14:45
03/07/99 02:55 - 03/07/99 03:24
03/07/99 03:35 - 03/07/99 05:35
03/07/99 16:45 - 03/07/99 18:45
03/07/99 22:45 - 03/07/99 23:05
03/10/99 00:55 - 03/10/99 01:45
03/10/99 02:35 - 03/10/99 02:55
03/10/99 04:15 - 03/10/99 09:15
03/11/99 02:25 - 03/11/99 02:35
03/12/99 02:25 - 03/12/99 02:35
03/13/99 02:25 - 03/13/99 02:35
03/14/99 02:25 - 03/14/99 02:35
03/15/99 02:25 - 03/15/99 02:35
03/15/99 03:45 - 03/15/99 04:04
03/17/99 13:55 - 03/17/99 14:35
03/17/99 20:15 - 03/17/99 20:35
03/20/99 04:15 - 03/20/99 04:24
03/20/99 05:04 - 03/20/99 05:24
03/20/99 19:45 - 03/20/99 20:25
03/20/99 23:35 - 03/21/99 00:15
03/23/99 10:35 - 03/23/99 11:15
03/25/99 23:15 - 03/25/99 23:55
03/26/99 13:55 - 03/26/99 14:15
03/27/99 18:45 - 03/27/99 20:15
03/28/99 16:15 - 03/28/99 18:06
03/28/99 22:55 - 03/28/99 23:15
03/30/99 02:35 - 03/30/99 02:55
03/31/99 19:45 - 03/31/99 20:35

• Sky/Cloud Infra-Red Temperature Minima(sky_ir_temp_min)
• Sky/Cloud Infra-Red Temperature Maxima(sky_ir_temp_max)
• Sky/Cloud Infra-Red Temperature(sky_ir_temp)
• Sky/Cloud Infra-Red Temperature Standard Deviation(sky_ir_temp_std)

TWP/SKYRAD/C2 - IRT affected by rain or shutter

During this time period, the SKYRAD IRT data was affected by rain
events due to a shutter which was installed to protect the optics
from being emersed in rainwater.  While the shutter was closed, or
if water got on the lens, the IRT data was invalid.  If water did
get on the lens, the contamination usually persisted until an
operator cleaned the optics.

The configuration of the IRT was changed Oct 29, 2001.
The IRT was mounted such that the field of view is directed
downward at a 30 degree elevation angle and reflected
to the vertical by a front-surfaced, gold-plated mirror.
This configuration prevents rain from directly striking
the lens and collecting in the lens barrel.

Data from 11/98-2/99 were examined and times when the
data are invalid are identified below.	Data from 3/99-10/01
also contain periods of invalid data, but it is left to
the data users to identify those periods and filter the
data according to their needs.

12/10/1998 04:30 - 12/10/1998 05:30 
12/10/1998 11:30 - 12/10/1998 12:30 
12/10/1998 13:00 - 12/10/1998 17:00 
12/17/1998 02:30 - 12/17/1998 04:00 
12/17/1998 13:00 - 12/17/1998 15:00 
12/23/1998 18:00 - 12/23/1998 20:00 
12/30/1998 21:00 - 12/31/1998 03:00 
01/12/1999 22:35 - 01/12/1999 23:45
01/13/1999 14:16 - 01/13/1999 16:35
01/13/1999 21:41 - 01/13/1999 23:30

• IRT1 maximum(irt1_max)
• IRT1 minimum(irt1_min)
• IRT1 standard deviation(irt1_sd)
• IRT1 mean(irt1_mean)

• IRT1 mean(irt1_mean)
• IRT1 standard deviation(irt1_sd)
• IRT1 minimum(irt1_min)
• IRT1 maximum(irt1_max)

TWP/SKYRAD/C1 - UVB Data questionable/incorrect due to uncontrolled sensor temperature

The UVB was not temperature controlled to 25C as required
to ensure accurate data.  UVB data should ONLY be used after 
checking both the bit_data and twpskyrad20sC1.a1 uvb_temp
or inst_down_uvb_temp.  UVB data where the UVB temperature
was outside the range of 24-26C should not be used.

• Downwelling Ultra-Violet Irradiance, UV Biometer(down_uvb)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Minima(down_uvb_min)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Standard Deviation(down_uvb_std)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Maxima(down_uvb_max)

• Instantaneous Uncorrected Downwelling Ultraviolet Irradiance, UV Biometer(inst_down_uvb_irradiance)
• Instantaneous Downwelling Ultraviolet Biometer Temperature(inst_down_uvb_temp)

TWP/SKYRAD/C2 - UVB Data questionable/incorrect due to uncontrolled sensor temperature

The UVB was not temperature controlled to 25C as required
to ensure accurate data.  UVB data should ONLY be used after 
checking both the bit_data and twpskyrad20sC1.a1 uvb_temp
or inst_down_uvb_temp.  UVB data where the UVB temperature
was outside the range of 24-26C should not be used.

• Instantaneous Downwelling Ultraviolet Biometer Temperature(inst_down_uvb_temp)
• Instantaneous Uncorrected Downwelling Ultraviolet Irradiance, UV Biometer(inst_down_uvb_irradiance)

• Downwelling Ultra-Violet Irradiance, UV Biometer, Minima(down_uvb_min)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Standard Deviation(down_uvb_std)
• Downwelling Ultra-Violet Irradiance, UV Biometer(down_uvb)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Maxima(down_uvb_max)

TWP/SKYRAD/C3 - UVB Data questionable/incorrect due to uncontrolled sensor temperature

The UVB was not temperature controlled to 25C as required
to ensure accurate data.  UVB data should ONLY be used after 
checking both the bit_data and twpskyrad20sC1.a1 uvb_temp
or inst_down_uvb_temp.  UVB data where the UVB temperature
was outside the range of 24-26C should not be used.

• Downwelling Ultra-Violet Irradiance, UV Biometer, Minima(down_uvb_min)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Standard Deviation(down_uvb_std)
• Downwelling Ultra-Violet Irradiance, UV Biometer(down_uvb)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Maxima(down_uvb_max)

• Downwelling Ultra-Violet Irradiance, UV Biometer, Standard Deviation(down_uvb_std)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Minima(down_uvb_min)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Maxima(down_uvb_max)
• Downwelling Ultra-Violet Irradiance, UV Biometer(down_uvb)

• Instantaneous Uncorrected Downwelling Ultraviolet Irradiance, UV Biometer(inst_down_uvb_irradiance)
• Instantaneous Downwelling Ultraviolet Biometer Temperature(inst_down_uvb_temp)

TWP/SKYRAD/C3 - UVB Data questionable/incorrect due to uncontrolled sensor temperature

The UVB was not temperature controlled to 25C as required
to ensure accurate data.  UVB data should ONLY be used after 
checking both the bit_data and twpskyrad20sC1.a1 uvb_temp
or inst_down_uvb_temp.  UVB data where the UVB temperature
was outside the range of 24-26C should not be used.

• Downwelling Ultra-Violet Irradiance, UV Biometer, Minima(down_uvb_min)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Standard Deviation(down_uvb_std)
• Downwelling Ultra-Violet Irradiance, UV Biometer(down_uvb)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Maxima(down_uvb_max)

• Instantaneous Uncorrected Downwelling Ultraviolet Irradiance, UV Biometer(inst_down_uvb_irradiance)
• Instantaneous Downwelling Ultraviolet Biometer Temperature(inst_down_uvb_temp)

TWP/SKYRAD/C1 - RESET activities

RESET actiivities may have affected data in subtle ways during this period.

• Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
  Pyrgeometer1(inst_down_long_shaded1_dome_resist)
• Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
  Pyrgeometer1(inst_down_long_shaded1_case_resist)
• Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer1(inst_down_long_hemisp_shaded1_tp)
• Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer2(inst_down_long_hemisp_shaded2_tp)
• Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
  Pyrgeometer2(inst_down_long_shaded2_dome_resist)
• Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
  Pyrgeometer2(inst_down_long_shaded2_case_resist)

• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Standard Deviation(down_short_diffuse_hemisp_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Standard
  Deviation(down_long_hemisp_shaded2_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Maxima(down_long_hemisp_shaded1_max)
• Sky/Cloud Infra-Red Temperature Minima(sky_ir_temp_min)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Minima(down_short_diffuse_hemisp_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp_shaded1)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard
  Deviation(down_short_hemisp_std)
• Downwelling Ultra-Violet Irradiance, UV Biometer(down_uvb)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_short_hemisp_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Minima(down_long_hemisp_shaded2_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp_shaded2)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Standard
  Deviation(down_long_hemisp_shaded1_std)
• Sky/Cloud Infra-Red Temperature Maxima(sky_ir_temp_max)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Minima(down_uvb_min)
• Sky/Cloud Infra-Red Temperature(sky_ir_temp)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Standard Deviation(down_uvb_std)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Maxima(down_long_hemisp_shaded2_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Minima(down_long_hemisp_shaded1_min)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Maxima(down_uvb_max)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
• Sky/Cloud Infra-Red Temperature Standard Deviation(sky_ir_temp_std)

TWP/SKYRAD/C1 - PIR identified as shaded2 is really an unshaded instrument

On Oct 24, 2001, the Global PIR was moved from the unshaded
position on the SKYRAD stand to a shaded position on the new
K&Z tracker.  The data for all time are named "shaded2" 
indicating that this PIR was ALWAYS shaded.  From 19961010
to 20011024, this was not the case.

• Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
  Pyrgeometer2(inst_down_long_shaded2_dome_resist)
• Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer2(inst_down_long_hemisp_shaded2_tp)
• Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
  Pyrgeometer2(inst_down_long_shaded2_case_resist)

• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Standard
  Deviation(down_long_hemisp_shaded2_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp_shaded2)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Minima(down_long_hemisp_shaded2_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Maxima(down_long_hemisp_shaded2_max)

TWP/SKYRAD/C3 - Incorrect NIP cal coefficient

During our site visit comparison at Darwin we observed that the skyrad NIP was reading 
about 50 w/m2 lower than the comparison cavity radfiometer and the replacement NIP on the 
comparison stand. We found that the calibration coefficient for the NIP (responsivity at 
45o)was put in as 8.64X10-6. The NIP was new and had not been calibrated at SGP. The 
factory number was 8.04X10-6. We corrected the calibration coefficient and the instruments 
agreed to better than 5 w/m2.

• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)

TWP/SKYRAD/C2 - IRT bias

The IRT appears to be measuring higher sky temperatures than the AERI. There is no 
indication as to its cause or whether the IRT or the AERI is at fault.

PRB note: because the AERI is calibrated between each sample, the AERI
data has a high degree of confidence and the bias is likely on the part
of the IRT.

• Sky/Cloud Infra-Red Temperature Minima(sky_ir_temp_min)
• Sky/Cloud Infra-Red Temperature Maxima(sky_ir_temp_max)
• Sky/Cloud Infra-Red Temperature(sky_ir_temp)

TWP/SKYRAD/C1 - Reprocess: NIP calibration

The tracker rotated and pulled the cable away from the NIP connector. In trying to 
discover the problem with the NIP a new NIP was put in. When the problem turned out to be the 
cable, the observers didn't put the former NIP back in. The NIP then in service was 31346E6 
RS@45=8.1573 whereas the coefficients used were for the old NIP 299937E6 RS@45=7.8775

• NIP minimum(nip_min)
• NIP mean(nip_mean)
• NIP maximum(nip_max)

TWP/SKYRAD/C3 - Reprocess: NIP calibrations incorrect

On 05/20 during installtion of the new Campbell datalogger system and associated program 
the NIP (S/N 33551E6) was assigned an incorrect calibration coefficient.  A coefficient of 
116.01 W/m2/mV was applied when it should have been 124.378 W/m2/mV.
TWP reports SV0405D and SV0409D detail the activities which lead to this DQR.

• Raw data stream - documentation not supported(Raw data stream - documentation not supported)

• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)

TWP/SKYRAD/C2 - IRT bias

The IRT was measuring higher sky temperatures than AERI. The problem was corrected by 
changing the mirror.

• Sky/Cloud Infra-Red Temperature Minima(sky_ir_temp_min)
• Sky/Cloud Infra-Red Temperature Maxima(sky_ir_temp_max)
• Sky/Cloud Infra-Red Temperature(sky_ir_temp)
• Sky/Cloud Infra-Red Temperature Standard Deviation(sky_ir_temp_std)

TWP/SKYRAD/C1 - Apparent logger problem

Beginning at 0620Z on 13 July, all Manus SKYRAD measurements deviated wildly from expected 
values.  The longwave fluxes climbed to well over the expected maximum of 500 W/m^2 to 
values over 1000 W/m^2.  At the same time, shortwave flux components developed large 
inconsistancies and night-time offsets.  Values had somewhat returned to normal ranges by 
2200Z on 14 July but again developed internal inconsistancies between 0430 and 1900Z on 15 
July.  The instruments appeared to be working normally once again as of 1900Z on 15 July.  
It is not known what caused this period of faulty values but it is thought that an 
electrical surge - perhaps from a lightning storm (though none was reported) may have caused 
the temporary problems.

• Time offset from base_time(base_time)
• Time offset from midnight of date of file. For CO data, this is identical to
  time_offset and is included for compatibility.(time)
• Wind #1 Direction(wind_direction_1)
• Full correction mode for Downwelling Shortwave Hemispheric Irradiance,
  Ventilated Pyrgeometer(dsdh_full_corrected_mode)
• Downwelling Pyrgeometer Case Thermistor Temperature, Backup(down_long_case_temperature_backup)
• Status flag for Downwelling Shortwave Hemispheric Irradiance, Ventilated
  Pyrgeometer, Detector only corrected(status_dsdh_detector_corrected)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer,
  Uncorrected for IR loss, Minima(down_short_hemisp_uncorrected_min)
• Downwelling Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard
  Deviation(down_long_hemisp_std)
• Downwelling Shortwave Diffuse Hemispheric Irradiance Uncorrected, Pyrgeometer,
  Standard Deviation(down_short_diffuse_hemisp_uncorrected_std)
• Effective temperature(effective_temperature)
• Downwelling Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Backup(down_long_hemisp_backup)
• Downwelling Longwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_long_hemisp)
• Downwelling Pyrgeometer Dome Thermistor Temperature, Backup(down_long_dome_temperature_backup)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer,
  Uncorrected for IR loss, Standard Deviation(down_short_hemisp_uncorrected_std)
• Detector Flux, Backup(detector_flux_backup)
• Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
  Minima(up_short_hemisp_min)
• Downwelling Shortwave Diffuse Hemispheric Irradiance Uncorrected, Pyrgeometer,
  Maxima(down_short_diffuse_hemisp_uncorrected_max)
• Vapor Pressure (kiloPascals)(vap_pres)
• north latitude for all the input platforms.(lat)
• Status flag for Rayleigh limit(status_rayleigh_limit)
• Air Temperature(air_temperature)
• Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer(up_short_hemisp)
• Solar Zenith Angle(zenith)
• Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
  Minima(up_long_hemisp_min)
• Upwelling Pyrgeometer Dome Thermistor Temperature(up_long_dome_temperature)
• Downwelling Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_long_hemisp_max)
• Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
  Standard Deviation(up_short_hemisp_std)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• altitude above sea levelaltunits(alt)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)
• Downwelling Shortwave Hemispheric Irradiance, Calculated, Sum of Direct
  Shortwave and Corrected Diffuse Shortwave(down_short_hemisp_sum)
• Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer(up_long_hemisp)
• Status flag for Downwelling Shortwave Hemispheric Irradiance, Ventilated
  Pyrgeometer, Full corrected (Mean absolute deviation)(status_dsdh_full_corrected)
• barometric pressure(bar_pres)
• Downwelling Pyrgeometer Case Thermistor Temperature(down_long_case_temperature)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Best
  Estimate(dsdh_best_estimate)
• Downwelling Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Backup,
  Maxima(down_long_hemisp_backup_max)
• Relative humidity scaled, by total column amount from MWR(rh)
• Wind #2 Speed(wind_speed_2)
• Downwelling Shortwave Diffuse Hemispheric Irradiance Uncorrected, Pyrgeometer,
  Minima(down_short_diffuse_hemisp_uncorrected_min)
• Downwelling Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Backup,
  Standard Deviation(down_long_hemisp_backup_std)
• Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
• precipitation accumulated between outputs, 3-hr accumulation(precip)
• Rayleigh limit(rayleigh_limit)
• Downwelling Pyrgeometer Dome Thermistor Temperature(down_long_dome_temperature)
• Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
  Maxima(up_long_hemisp_max)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer,
  Uncorrected for IR loss, Maxima(down_short_hemisp_uncorrected_max)
• Upwelling Pyrgeometer Case Thermistor Temperature(up_long_case_temperature)
• Time offset of tweaks from base_time(time_offset)
• Detector only correction mode for Downwelling Shortwave Hemispheric Irradiance,
  Ventilated Pyrgeometer(dsdh_detector_corrected_mode)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Detector
  only corrected(dsdh_detector_corrected)
• Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
  Standard Deviation(up_long_hemisp_std)
• east longitude for all the input platforms.(lon)
• Downwelling Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_long_hemisp_min)
• Downwelling Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Backup,
  Minima(down_long_hemisp_backup_min)
• Cosine of the Solar Zenith Angle(cos_zenith)
• Wind #1 Speed(wind_speed_1)
• Downwelling Shortwave Diffuse Hemispheric Irradiance Uncorrected, Pyrgeometer(down_short_diffuse_hemisp_uncorrected)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer,
  Uncorrected for IR loss(down_short_hemisp_uncorrected)
• Wind #2 Direction(wind_direction_2)
• Detector flux (Down-welling pyrgeometer thermopile voltage * PIR-DIR calib-coef)
  Calculated value from 20s data(detector_flux)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Full
  corrected (Weighted Mean absolute deviation using Median)(dsdh_full_corrected)
• Status flag for Downwelling Shortwave Hemispheric Irradiance, Ventilated
  Pyrgeometer, Sum of Direct Shortwave and Corrected Diffuse Shortwave(status_down_short_hemisp_sum)
• Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
  Maxima(up_short_hemisp_max)

• Measured Downwelling Global Shortwave Irradiance (gsw)(gswfluxdn_measured)
• altitude above sea levelaltunits(alt)
• Ratio of Clear-sky Fit Estimated Downwelling Diffuse Shortwave Irradiance to
  Clear-sky Fit Estimated Downwelling Global Shortwave Irradiance (cdifr)(difratiodn_clearskyfit)
• Measured Downwelling Direct Shortwave Irradiance (dir)(dirfluxdn_measured)
• Number of 1-minute Measured Downwelling Summed Shortwave Irradiances in the
  15-minute Interval (Nssw)(nsamples_sswfluxdn_measured)
• Clear-sky Fit Estimated Downwelling Global UVB Irradiance (cguvb)(guvbdn_clearskyfit)
• Arithmetic Average Distance from the Earth to the Sun (au)(sun_earth_distance)
• Site Identification(site)
• Difference: gswfluxdn_measured - gswfluxdn_clearskyfit (gswfcg)(gswfluxdn_cloudeffect)
• north latitude for all the input platforms.(lat)
• Number of 1-minute Clear-sky Detections in the 15-minute Interval (Nclr)(nsamples_clearsky_detection)
• Clear-sky Fit Estimated Downwelling Direct Shortwave Irradiance (cdir)(dirfluxdn_clearskyfit)
• Clear-sky Fit Estimated Surface Albedo from Shortwave Irradiance Measurements
  (calb)(albedosw_clearskyfit)
• Average over the interval of the standard deviation of difratiodn_measured
  computed using a 3-5 sample window centered at each 1-min sample(difratiodn_measured_stdev)
• Estimated Average Fractional Sky Cover over the Hemispheric Dome (cf)(cloudfraction)
• Number of 1-minute Cloud Fraction Estimates in the 15-minute Interval (Ncf)(nsamples_cloudfraction)
• Beginning Time of File (LST)(base_time_LST)
• Time Offset from base_time_LST(time_offset_LST)
• Clear-sky Fit Estimated Downwelling Diffuse Field Shortwave Irradiance (cdif)(difswfluxdn_clearskyfit)
• Clear-sky Fit Estimated Downwelling Global Shortwave Irradiance (cgsw)(gswfluxdn_clearskyfit)
• Measured Surface Albedo from Shortwave Irradiance Measurements (alb)(albedosw_measured)
• Measured Downwelling Diffuse Shortwave Irradiance (dif)(difswfluxdn_measured)
• east longitude for all the input platforms.(lon)
• Ratio of Measured minus Clear-sky Fit Estimated Downwelling Diffuse Shortwave
  Irradiance to Clear-sky Fit Estimated Downwelling Global Shortwave Irradiance
  (di(difcloudeffect_normalized)
• Time offset of tweaks from base_time(time_offset)
• Measured Downwelling Summed Shortwave Irradiance
  (dirfluxdn_measured+diffluxdn_measured) (ssw)(sswfluxdn_measured)
• Time offset from base_time(base_time)
• Arithmetic Average Cosine of the Solar Zenith Angle Z (CosZ)(solar_cos_z)
• Ratio of Measured Downwelling Diffuse Shortwave Irradiance to Measured
  Downwelling Global Shortwave Irradiance (difr)(difratiodn_measured)
• Number of 1-minute Clear-sky Fit Downwelling Global Shortwave Irradiance
  Estimates in the 15-minute Interval (Ncsw)(nsamples_gswfluxdn_clearskyfit)
• Difference: sswfluxdn_measured - sswfluxdn_clearskyfit (sswfcg)(sswfluxdn_cloudeffect)
• Clear-sky Fit Estimated Downwelling Summed Shortwave Irradiance
  (dirfluxdn_clearskyfit+diffluxdn_clearskyfit) (cssw)(sswfluxdn_clearskyfit)
• Difference: difswfluxdn_measured - difswfluxdn_clearskyfit (diffcg)(difswfluxdn_cloudeffect)
• Measured Downwelling Global UVB Irradiance (guvb)(guvbdn_measured)

• Clear-sky Fit Coefficient b to Diffuse Irradiance to Total Irradiance Ratio
  (DFRb)(coef_clearsky_difratio_b)
• Measured Downwelling Direct Shortwave Irradiance (dir)(dirfluxdn_measured)
• Measured Downwelling Global UVB Irradiance (guvb)(guvbdn_measured)
• altitude above sea levelaltunits(alt)
• Clear-sky Fit Estimated Downwelling Direct Shortwave Irradiance (cdir)(dirfluxdn_clearskyfit)
• Clear-sky Fit Coefficient a to Summed Shortwave Irradiance (CSWa)(coef_clearsky_ssw_a)
• Clear-sky Fit Coefficient a to Global UVB Irradiance (UVBa)(coef_clearsky_guvb_a)
• Clear-sky Fit Coefficient b to Global UVB Irradiance (UVBb)(coef_clearsky_guvb_b)
• Date (YYMMDD LST) for which the Coefficients are Applicable(coef_date)
• Difference: gswfluxdn_measured - gswfluxdn_clearskyfit (gswfcg)(gswfluxdn_cloudeffect)
• Measured Downwelling Global Shortwave Irradiance (gsw)(gswfluxdn_measured)
• Clear-sky Fit Coefficient a to Global minus Summed Shortwave Irradiance
  Difference (SCORa)(coef_clearsky_dsw_a)
• Clear-sky Fit Coefficient b to Summed Shortwave Irradiance (CSWb)(coef_clearsky_ssw_b)
• Ratio of Measured Downwelling Diffuse Shortwave Irradiance to Measured
  Downwelling Global Shortwave Irradiance (difr)(difratiodn_measured)
• Clear-sky Fit Estimated Surface Albedo from Shortwave Irradiance Measurements
  (calb)(albedosw_clearskyfit)
• Measured Surface Albedo from Shortwave Irradiance Measurements (alb)(albedosw_measured)
• Difference: difswfluxdn_measured - difswfluxdn_clearskyfit (diffcg)(difswfluxdn_cloudeffect)
• Clear-sky Fit Coefficient a to Diffuse Irradiance to Total Irradiance Ratio
  (DFRa)(coef_clearsky_difratio_a)
• Clear-sky Fit Estimated Downwelling Global UVB Irradiance (cguvb)(guvbdn_clearskyfit)
• Clear-sky Fit Estimated Downwelling Diffuse Field Shortwave Irradiance (cdif)(difswfluxdn_clearskyfit)
• Time Offset from base_time_LST(time_offset_LST)
• Clear-sky Fit Estimated Downwelling Global Shortwave Irradiance (cgsw)(gswfluxdn_clearskyfit)
• Time offset of tweaks from base_time(time_offset)
• east longitude for all the input platforms.(lon)
• Clear-sky Fit Estimated Downwelling Summed Shortwave Irradiance
  (dirfluxdn_clearskyfit+diffluxdn_clearskyfit) (cssw)(sswfluxdn_clearskyfit)
• Arithmetic Average Cosine of the Solar Zenith Angle Z (CosZ)(solar_cos_z)
• Clear-sky Offset Coefficient c for Global minus Summed Shortwave Irradiance
  Difference (SCORc)(coef_clearsky_dsw_c)
• Clear-sky Fit Coefficient a to Global Shortwave Irradiance (CSWa)(coef_clearsky_gsw_a)
• Clear-sky Fit Coefficient b to Global Shortwave Irradiance (CSWb)(coef_clearsky_gsw_b)
• Beginning Time of File (LST)(base_time_LST)
• Clear-sky Fit Coefficient b to Global minus Summed Shortwave Irradiance
  Difference (SCORb)(coef_clearsky_dsw_b)
• Difference: sswfluxdn_measured - sswfluxdn_clearskyfit (sswfcg)(sswfluxdn_cloudeffect)
• Ratio of Clear-sky Fit Estimated Downwelling Diffuse Shortwave Irradiance to
  Clear-sky Fit Estimated Downwelling Global Shortwave Irradiance (cdifr)(difratiodn_clearskyfit)
• Measured Downwelling Diffuse Shortwave Irradiance (dif)(difswfluxdn_measured)
• Time offset from base_time(base_time)
• Arithmetic Average Distance from the Earth to the Sun (au)(sun_earth_distance)
• Site Identification(site)
• Daily Averaged Distance from the Earth to the Sun (auavg)(sun_earth_distance_dailyaverage)
• Measured Downwelling Summed Shortwave Irradiance
  (dirfluxdn_measured+diffluxdn_measured) (ssw)(sswfluxdn_measured)
• Clear-sky Detection Flag (clrf)(flag_clearsky_detection)
• Clear-sky Fit Coefficient a to Albedo (Alba)(coef_clearsky_albedo_a)
• Clear-sky Fit Coefficient b to Albedo (Albb)(coef_clearsky_albedo_b)
• north latitude for all the input platforms.(lat)

• Instantaneous PIR2 dome thermistor(pir2_dome_therm)
• Instantaneous Uncorrected Downwelling Ultraviolet Irradiance, UV Biometer(inst_down_uvb_irradiance)
• north latitude for all the input platforms.(lat)
• Instantaneous PIR2 uncorrected irradiance(pir2_uncorr_irradiance)
• Time offset of tweaks from base_time(time_offset)
• Instantaneous UVB uncorrected irradiance(uvb_uncorr_irradiance)
• altitude above sea levelaltunits(alt)
• Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
  Pyrgeometer1(inst_down_long_shaded1_dome_resist)
• Instantaneous PIR1 uncorrected irradiance(pir1_uncorr_irradiance)
• Instantaneous Downwelling Pyrgeometer Thermopile Voltage, Shaded Pyrgeometer(inst_down_long_hemisp_shaded_tp)
• Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
  Pyrgeometer1(inst_down_long_shaded1_case_resist)
• Instantaneous UVB temperature(uvb_temp)
• Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Unshaded
  Pyrgeometer(inst_down_long_unshaded_case_resist)
• Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer2(inst_down_long_hemisp_shaded2_tp)
• Instantaneous PIR1 dome thermistor(pir1_dome_therm)
• Instantaneous PIR2 case thermistor(pir2_case_therm)
• Time offset from base_time(base_time)
• Instantaneous Downwelling Ultraviolet Biometer Temperature(inst_down_uvb_temp)
• east longitude for all the input platforms.(lon)
• Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer1(inst_down_long_hemisp_shaded1_tp)
• Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Unshaded
  Pyrgeometer(inst_down_long_unshaded_dome_resist)
• GPS raw data filename(filename)
• Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
  Pyrgeometer2(inst_down_long_shaded2_dome_resist)
• Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
  Pyrgeometer2(inst_down_long_shaded2_case_resist)
• Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
  Pyrgeometer(inst_down_long_shaded_case_resist)
• Instantaneous Downwelling Pyrgeometer Thermopile, Unshaded Pyrgeometer(inst_down_long_hemisp_unshaded_tp)
• Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
  Pyrgeometer(inst_down_long_shaded_dome_resist)
• Instantaneous PIR1 case thermistor(pir1_case_therm)

• PIR1 unshaded minimum(pir1_min)
• Downwelling Ultra-Violet Irradiance, UV Biometer(down_uvb)
• NIP maximum(nip_max)
• Bit data. See details.(bit_data)
• PSP shaded maximum(psps_max)
• Time offset of tweaks from base_time(time_offset)
• east longitude for all the input platforms.(lon)
• External voltage(external_voltage)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Minima(down_long_hemisp_shaded1_min)
• IRT1 maximum(irt1_max)
• Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer, Standard
  Deviation(down_long_hemisp_unshaded_std)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Maxima(down_short_diffuse_hemisp_max)
• Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer, Minima(down_long_hemisp_unshaded_min)
• NIP standard deviation(nip_sd)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Maxima(down_long_hemisp_shaded1_max)
• PIR shaded minimum(pirs_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Standard
  Deviation(down_long_hemisp_shaded_std)
• Sky/Cloud Infra-Red Temperature(sky_ir_temp)
• IRT1 minimum(irt1_min)
• PIR shaded standard deviation(pirs_sd)
• PIR shaded mean(pirs_mean)
• Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer, Maxima(down_long_hemisp_unshaded_max)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Standard Deviation(down_short_diffuse_hemisp_std)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp)
• NIP minimum(nip_min)
• PSP shaded standard deviation(psps_sd)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp_shaded2)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded)
• UVB standard deviation(uvb_sd)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Standard
  Deviation(down_long_hemisp_shaded2_std)
• PSP1 unshaded mean(psp1_mean)
• Sky/Cloud Infra-Red Temperature Minima(sky_ir_temp_min)
• IRT1 mean(irt1_mean)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Minima(down_short_diffuse_hemisp_min)
• altitude above sea levelaltunits(alt)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp_shaded1)
• PIR1 unshaded maximum(pir1_max)
• Internal voltage(internal_voltage)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Maxima(down_long_hemisp_shaded2_max)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Maxima(down_uvb_max)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard
  Deviation(down_short_hemisp_std)
• PIR shaded maximum(pirs_max)
• PSP shaded mean(psps_mean)
• UVB minimum(uvb_min)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Standard Deviation(down_uvb_std)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• PIR1 unshaded mean(pir1_mean)
• Time offset from base_time(base_time)
• Sky/Cloud Infra-Red Temperature Standard Deviation(sky_ir_temp_std)
• Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
• Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer(down_long_hemisp_unshaded)
• PSP1 unshaded standard deviation(psp1_sd)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Internal Logger Temperature(logger_temp)
• UVB maximum(uvb_max)
• PIR1 unshaded standard deviation(pir1_sd)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)
• PSP shaded minimum(psps_min)
• PSP1 unshaded maximum(psp1_max)
• GPS raw data filename(filename)
• IRT1 standard deviation(irt1_sd)
• NIP mean(nip_mean)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_short_hemisp_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Minima(down_long_hemisp_shaded2_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Standard
  Deviation(down_long_hemisp_shaded1_std)
• Sky/Cloud Infra-Red Temperature Maxima(sky_ir_temp_max)
• Downwelling Ultra-Violet Irradiance, UV Biometer, Minima(down_uvb_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Minima(down_long_hemisp_shaded_min)
• north latitude for all the input platforms.(lat)
• UVB mean(uvb_mean)
• PSP1 unshaded minimum(psp1_min)

• Raw data stream - documentation not supported(Raw data stream - documentation not supported)

TWP/SKYRAD/C3 - tracker inoperative

A lightning strike at Darwin removed the tracker from service.  Instruments installed on 
the tracker were rendered either inoperative or were not shaded during this time period.  
The longwave hemispheric instruments PIR1 and PIR2 appear to have been unaffected.  They 
are not suseptable to incorrect tracker operation.  The downwelling hemispheric shortwave 
PSP instrument mounted on Skyrad will not be affected by incorrect tracker operation.

• Raw data stream - documentation not supported(Raw data stream - documentation not supported)

• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Maxima(down_short_diffuse_hemisp_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Minima(down_short_diffuse_hemisp_min)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Standard Deviation(down_short_diffuse_hemisp_std)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)

• Instantaneous Direct Normal Shortwave Irradiance, Pyrheliometer Thermopile
  Voltage(inst_direct_normal)
• Instantaneous Uncorrected Downwelling Shortwave Diffuse, Shaded Pyranometer
  Thermopile Voltage(inst_diffuse)

TWP/SKYRAD/C1  - IRT failure

A moisture related fault was found in the IRT cable after a day of very heavy rain. The 
cable was replaced but the internal power supply was apparently damaged. The instrument was 
replaced with a spare IRT.

• Sky/Cloud Infra-Red Temperature Minima(sky_ir_temp_min)
• Sky/Cloud Infra-Red Temperature Maxima(sky_ir_temp_max)
• Sky/Cloud Infra-Red Temperature(sky_ir_temp)
• Sky/Cloud Infra-Red Temperature Standard Deviation(sky_ir_temp_std)

TWP/SKYRAD/C3 - Reprocess: Incorrect datalogger program affecting PIR1 and PIR2 
downwelling longwave

The excitation delays using in measuring the PIR1 case thermistor commonly named "Case1" 
and the PIR2 dome thermistor called "Dome2" were discovered to have been incorrectly set 
to 0 in the Skyrad datalogger program when the new CR23X based Skyrad loggers were 
installed.  The result of no delay in these measurements results in an error in the measured 
resistance of the thermistors, Case1 and Dome2, and thus the calculated PIR1 and PIR2 
irradiances.  The errors are inversely proportial to temperature.

Users can apply temperature dependent irradiance corrections as shown in the table below.  
Recall that the reported uncertainty of PIRs is typically +-.25% to +-.5% or 1 to 2 
W/m2. The error corrections become the same order of magnitude or larger than the instrument 
uncertainties at or below 260K or 9F. Irradiance Correction Table for Skyrad (TWP and 
NSA) DIR1 and DIR2 Irradiance

		DIR1	DIR1	DIR2	DIR2
	T[F]	Tcase[K]	Correction[W/m2]	Tdome[K]       
		Correction[W/m2]
	109.4	316.13	0.00	316.13	0.00
	100.5	311.20	-0.15	311.20	0.12
	93.2	307.14	-0.12	307.14	0.10
	87.0	303.70	-0.10	303.70	0.08
	81.6	300.70	-0.17	300.70	0.14
	77.0	298.15	-0.22	298.15	0.18
	59.4	288.35	-0.34	288.35	0.27
	47.4	281.72	-0.23	281.72	0.18
	38.5	276.74	-0.42	276.74	0.34
	31.3	272.77	-0.48	272.77	0.38
	25.4	269.48	-0.61	269.48	0.49
	20.3	266.67	-0.67	266.67	0.54
	16.0	264.25	-0.82	264.25	0.66
	12.1	262.11	-0.98	262.11	0.79
	8.7	260.19	-0.97	260.19	0.78
	5.6	258.46	-1.07	258.46	0.86
	2.7	256.89	-1.17	256.89	0.94
	0.1	255.44	-1.33	255.44	1.07
	-2.3	254.11	-1.41	254.11	1.13
	-4.5	252.87	-1.43	252.87	1.15
	-6.6	251.71	-1.52	251.71	1.22
	-8.5	250.63	-1.63	250.63	1.31
	-10.4	249.62	-1.73	249.62	1.39
	-12.2	248.58	-1.79	248.58	1.44
	-15.4	246.82	-1.93	246.82	1.55
	-18.3	245.23	-2.05	245.23	1.65
	-20.9	243.78	-2.22	243.78	1.78
	-23.3	242.44	-2.36	242.44	1.89
	-25.5	241.21	-2.58	241.21	2.07
	-27.5	240.07	-2.65	240.07	2.13
	-29.5	239.01	-2.75	239.01	2.21
	-31.3	238.00	-3.02	238.00	2.42

• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Minima(down_long_hemisp_shaded2_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp_shaded2)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Standard
  Deviation(down_long_hemisp_shaded2_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Standard
  Deviation(down_long_hemisp_shaded1_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Maxima(down_long_hemisp_shaded1_max)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Maxima(down_long_hemisp_shaded2_max)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Minima(down_long_hemisp_shaded1_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp_shaded1)

TWP/SKYRAD/C1 - Reprocess: Incorrect datalogger program affecting PIR1 and PIR2 
downwelling longwave

The excitation delays using in measuring the PIR1 case thermistor commonly named "Case1" 
and the PIR2 dome thermistor called "Dome2" were discovered to have been incorrectly set 
to 0 in the Skyrad datalogger program when the new CR23X based Skyrad loggers were 
installed.  The result of no delay in these measurements results in an error in the measured 
resistance of the thermistors, Case1 and Dome2, and thus the calculated PIR1 and PIR2 
irradiances.  The absolute value of the errors are inversely proportial to temperature.

Users can apply temperature dependent irradiance corrections shown in the table below.  
Recall that the reported uncertainty of PIRs is typically +-.25% to +-.5% or 1 to 2 W/m2. 
The error corrections become the same order of magnitude or larger than the instrument 
uncertainties at or below 260K or 9F. 

Irradiance Correction Table for Skyrad (TWP and NSA) DIR1 and DIR2 Irradiance

		DIR1	DIR1	DIR2	DIR2
	T[F]	Tcase[K]	Correction[W/m2]	Tdome[K]       
		Correction[W/m2]
	109.4	316.13	0.00	316.13	0.00
	100.5	311.20	-0.15	311.20	0.12
	93.2	307.14	-0.12	307.14	0.10
	87.0	303.70	-0.10	303.70	0.08
	81.6	300.70	-0.17	300.70	0.14
	77.0	298.15	-0.22	298.15	0.18
	59.4	288.35	-0.34	288.35	0.27
	47.4	281.72	-0.23	281.72	0.18
	38.5	276.74	-0.42	276.74	0.34
	31.3	272.77	-0.48	272.77	0.38
	25.4	269.48	-0.61	269.48	0.49
	20.3	266.67	-0.67	266.67	0.54
	16.0	264.25	-0.82	264.25	0.66
	12.1	262.11	-0.98	262.11	0.79
	8.7	260.19	-0.97	260.19	0.78
	5.6	258.46	-1.07	258.46	0.86
	2.7	256.89	-1.17	256.89	0.94
	0.1	255.44	-1.33	255.44	1.07
	-2.3	254.11	-1.41	254.11	1.13
	-4.5	252.87	-1.43	252.87	1.15
	-6.6	251.71	-1.52	251.71	1.22
	-8.5	250.63	-1.63	250.63	1.31
	-10.4	249.62	-1.73	249.62	1.39
	-12.2	248.58	-1.79	248.58	1.44
	-15.4	246.82	-1.93	246.82	1.55
	-18.3	245.23	-2.05	245.23	1.65
	-20.9	243.78	-2.22	243.78	1.78
	-23.3	242.44	-2.36	242.44	1.89
	-25.5	241.21	-2.58	241.21	2.07
	-27.5	240.07	-2.65	240.07	2.13
	-29.5	239.01	-2.75	239.01	2.21
	-31.3	238.00	-3.02	238.00	2.42

• Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer2(inst_down_long_hemisp_shaded2_tp)
• Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
  Pyrgeometer2(inst_down_long_shaded2_dome_resist)
• Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
  Pyrgeometer1(inst_down_long_shaded1_case_resist)
• Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer1(inst_down_long_hemisp_shaded1_tp)
• Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
  Pyrgeometer1(inst_down_long_shaded1_dome_resist)
• Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
  Pyrgeometer2(inst_down_long_shaded2_case_resist)

• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Standard
  Deviation(down_long_hemisp_shaded2_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp_shaded2)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Maxima(down_long_hemisp_shaded1_max)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Standard
  Deviation(down_long_hemisp_shaded1_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Maxima(down_long_hemisp_shaded2_max)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp_shaded1)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Minima(down_long_hemisp_shaded1_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Minima(down_long_hemisp_shaded2_min)

TWP/SKYRAD/C2 - Reprocess: Incorrect datalogger program affecting PIR1 and PIR2 
downwelling longwave

The excitation delays using in measuring the PIR1 case thermistor commonly named "Case1" 
and the PIR2 dome thermistor called "Dome2" were discovered to have been incorrectly set 
to 0 in the Skyrad datalogger program when the new CR23X based Skyrad loggers were 
installed.  The result of no delay in these measurements results in an error in the measured 
resistance of the thermistors, Case1 and Dome2, and thus the calculated PIR1 and PIR2 
irradiances.  The absolute value of the errors are inversely proportial to temperature.

Users can apply the temperature dependent irradiance corrections shown in the table below. 
 Recall that the reported uncertainty of PIRs is typically +-.25% to +-.5% or 1 to 2 
W/m2. The error corrections become the same order of magnitude or larger than the instrument 
uncertainties at or below 260K or 9F.
 
Irradiance Correction Table for Skyrad (TWP and NSA) DIR1 and DIR2 Irradiance
		DIR1	DIR1	DIR2	DIR2
	T[F]	Tcase[K]	Correction[W/m2]	Tdome[K]       
		Correction[W/m2]
	109.4	316.13	0.00	316.13	0.00
	100.5	311.20	-0.15	311.20	0.12
	93.2	307.14	-0.12	307.14	0.10
	87.0	303.70	-0.10	303.70	0.08
	81.6	300.70	-0.17	300.70	0.14
	77.0	298.15	-0.22	298.15	0.18
	59.4	288.35	-0.34	288.35	0.27
	47.4	281.72	-0.23	281.72	0.18
	38.5	276.74	-0.42	276.74	0.34
	31.3	272.77	-0.48	272.77	0.38
	25.4	269.48	-0.61	269.48	0.49
	20.3	266.67	-0.67	266.67	0.54
	16.0	264.25	-0.82	264.25	0.66
	12.1	262.11	-0.98	262.11	0.79
	8.7	260.19	-0.97	260.19	0.78
	5.6	258.46	-1.07	258.46	0.86
	2.7	256.89	-1.17	256.89	0.94
	0.1	255.44	-1.33	255.44	1.07
	-2.3	254.11	-1.41	254.11	1.13
	-4.5	252.87	-1.43	252.87	1.15
	-6.6	251.71	-1.52	251.71	1.22
	-8.5	250.63	-1.63	250.63	1.31
	-10.4	249.62	-1.73	249.62	1.39
	-12.2	248.58	-1.79	248.58	1.44
	-15.4	246.82	-1.93	246.82	1.55
	-18.3	245.23	-2.05	245.23	1.65
	-20.9	243.78	-2.22	243.78	1.78
	-23.3	242.44	-2.36	242.44	1.89
	-25.5	241.21	-2.58	241.21	2.07
	-27.5	240.07	-2.65	240.07	2.13
	-29.5	239.01	-2.75	239.01	2.21
	-31.3	238.00	-3.02	238.00	2.42

• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp_shaded1)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Minima(down_long_hemisp_shaded2_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Standard
  Deviation(down_long_hemisp_shaded2_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp_shaded2)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Standard
  Deviation(down_long_hemisp_shaded1_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Maxima(down_long_hemisp_shaded2_max)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Maxima(down_long_hemisp_shaded1_max)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Minima(down_long_hemisp_shaded1_min)

• Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
  Pyrgeometer2(inst_down_long_shaded2_dome_resist)
• Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer2(inst_down_long_hemisp_shaded2_tp)
• Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer1(inst_down_long_hemisp_shaded1_tp)
• Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
  Pyrgeometer2(inst_down_long_shaded2_case_resist)
• Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
  Pyrgeometer1(inst_down_long_shaded1_case_resist)
• Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
  Pyrgeometer1(inst_down_long_shaded1_dome_resist)

TWP/SKYRAD/C3 - IRT damaged

The analog output of the IRT was damaged by a lightning strike. The problem was corrected 
by replacing the instrument with a spare. The damaged IRT was returned to the vendor for 
repair.

• Sky/Cloud Infra-Red Temperature Minima(sky_ir_temp_min)
• Sky/Cloud Infra-Red Temperature(sky_ir_temp)
• Sky/Cloud Infra-Red Temperature Standard Deviation(sky_ir_temp_std)

• Instantaneous Sky/Cloud Infrared(inst_sky_ir_signal)

TWP/SKYRAD/C3 - Tracker stopped

Solar Tracker stopped and had to be repowered

• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Maxima(down_short_diffuse_hemisp_max)
• Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer, Maxima(down_long_hemisp_unshaded_max)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Minima(down_short_diffuse_hemisp_min)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Standard Deviation(down_short_diffuse_hemisp_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Standard
  Deviation(down_long_hemisp_shaded1_std)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer, Standard
  Deviation(down_long_hemisp_unshaded_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Maxima(down_long_hemisp_shaded2_max)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp_shaded1)
• Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer(down_long_hemisp_unshaded)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Minima(down_long_hemisp_shaded_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Minima(down_long_hemisp_shaded2_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp_shaded2)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Standard
  Deviation(down_long_hemisp_shaded2_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Standard
  Deviation(down_long_hemisp_shaded_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Maxima(down_long_hemisp_shaded1_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Minima(down_long_hemisp_shaded1_min)
• Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer, Minima(down_long_hemisp_unshaded_min)

TWP/SKYRAD/C3 - Solar Tracker locking at solar noon

The Scitech solar tracker from SGP that was installed on 2005-12-01 after the previous 
tracker was damaged by lightning on 2005-11-14 has been hanging up every day at solar noon.  
In Feb, the sun moved from south to north and the Scitech tracker does not seem to be 
able to deal with this. During this period the operators power cycled the tracker between 
05:00Z and 10:00Z almost every day and data from around solar noon (03:30Z) until the 
power cycle are unusable for the measurements that use the tracker (NIP, B&W Diffuse, and 
shaded PIRs).
The problem was corrected when the Scitech tracker was replaced by a Brusag
tracker on 2006-03-10.

• Raw data stream - documentation not supported(Raw data stream - documentation not supported)

• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Maxima(down_short_diffuse_hemisp_max)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_short_hemisp_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp_shaded2)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard
  Deviation(down_short_hemisp_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Minima(down_long_hemisp_shaded2_min)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Standard
  Deviation(down_long_hemisp_shaded2_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Standard
  Deviation(down_long_hemisp_shaded_std)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Minima(down_long_hemisp_shaded1_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Minima(down_short_diffuse_hemisp_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Standard
  Deviation(down_long_hemisp_shaded1_std)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
  Standard Deviation(down_short_diffuse_hemisp_std)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Maxima(down_long_hemisp_shaded2_max)
• Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp_shaded1)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Minima(down_long_hemisp_shaded_min)
• Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Maxima(down_long_hemisp_shaded1_max)

• Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer1(inst_down_long_hemisp_shaded1_tp)
• Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
  Pyrgeometer1(inst_down_long_shaded1_dome_resist)
• Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
  Pyrgeometer2(inst_down_long_shaded2_case_resist)
• Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
  Pyrgeometer2(inst_down_long_shaded2_dome_resist)
• Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
  Pyrgeometer1(inst_down_long_shaded1_case_resist)
• Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer2(inst_down_long_hemisp_shaded2_tp)

• Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
  Pyrgeometer1(inst_down_long_shaded1_case_resist)
• Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
  Pyrgeometer1(inst_down_long_shaded1_dome_resist)
• Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer2(inst_down_long_hemisp_shaded2_tp)
• Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
  Pyrgeometer(inst_down_long_shaded_dome_resist)
• Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
  Pyrgeometer(inst_down_long_shaded_case_resist)
• Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
  Pyrgeometer2(inst_down_long_shaded2_dome_resist)
• Instantaneous Downwelling Pyrgeometer Thermopile Voltage, Shaded Pyrgeometer(inst_down_long_hemisp_shaded_tp)
• Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
  Pyrgeometer2(inst_down_long_shaded2_case_resist)
• Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer1(inst_down_long_hemisp_shaded1_tp)

TWP/SKYRAD/C1 - Reprocess: Longwave Calibration error

Modified pyrgeometer calibration procedures were implemented beginning in December 2003.  
These modified procedures introduced a calibration bias in the longwave data.  The 
previous procedures were re-implemented at all sites between December 2005 and February 2006 to 
restore proper calibrations.                                                             
                The data collected while the incorrect procedures were in place are 
being reprocessing to remove the calibration bias.  Note, this also affected standard 
deviation, maximum and minimum data fields.

• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp_shaded2)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp_shaded1)

TWP/SKYRAD/C2 - Reprocess: Longwave Calibration error

Modified pyrgeometer calibration procedures were implemented beginning in December 2003.  
These modified procedures introduced a calibration bias in the longwave data.  The 
previous procedures were re-implemented at all sites between December 2005 and February 2006 to 
restore proper calibrations.                                                             
                The data collected while the incorrect procedures were in place are 
being reprocessing to remove the calibration bias.  Note, this also affected standard 
deviation, maximum and minimum data fields.

• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp_shaded1)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp_shaded2)

TWP/SKYRAD/C3 - Reprocess: Longwave Calibration error

Modified pyrgeometer calibration procedures were implemented beginning in December 2003.  
These modified procedures introduced a calibration bias in the longwave data.  The 
previous procedures were re-implemented at all sites between December 2005 and February 2006 to 
restore proper calibrations.                                                             
                The data collected while the incorrect procedures were in place are 
being reprocessing to remove the calibration bias.  Note, this also affected standard 
deviation, maximum and minimum data fields.

• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp_shaded2)
• Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp_shaded1)

TWP/SKYRAD/C2 - IRT signal loss

There was a significant drop in logger voltage that corresponds with a loss of the IR 
temperature. This was possibly due to a loose connection.

• Sky/Cloud Infra-Red Temperature Minima(sky_ir_temp_min)
• Sky/Cloud Infra-Red Temperature Maxima(sky_ir_temp_max)
• Sky/Cloud Infra-Red Temperature(sky_ir_temp)
• Sky/Cloud Infra-Red Temperature Standard Deviation(sky_ir_temp_std)

TWP/SKYRAD/C3 - NIP Failure

Skyrad normal incident shortwave irradiance (NIP) started reporting impossible values for 
direct normal irradiance starting 16 November approx 2100GMT corresponding to a rain 
event at the same time.

The NIP was replaced fixing the problem.

Direct normal data are not recoverable.  However, the NIP data can be calculated from the 
global hemsipherical shortwave and global hemispherical diffuse datastreams by using the 
following relationship:
Global Horizontal = Direct Normal x cos(Z) + Diffuse Horizontal 
where Z is the zenith angle.

• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)

• Instantaneous Direct Normal Shortwave Irradiance, Pyrheliometer Thermopile
  Voltage(inst_direct_normal)

TWP/SKYRAD/C3 - NIP instrument failure

The NIP (Short Direct Normal) was replaced after it displayed symptoms of failure 
associated with either unknown precipitation related issues or a possible lightning strike.

NIP data are not recoverable.  Direct normal data can be reconstructed from global 
hemispheric and global diffuse data using the following relationship:
   global hemispheric = direct*cos(sza) + diffuse hemispheric

• Raw data stream - documentation not supported(Raw data stream - documentation not supported)

• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)

• Instantaneous Direct Normal Shortwave Irradiance, Pyrheliometer Thermopile
  Voltage(inst_direct_normal)

TWP/SKYRAD/C2 - Short direct normal

The short_direct_normal (NIP) data are missing or incorrect due to instrument cable 
failure.  The cable was replaced.

The short_direct_normal can be calculated using the following relationship for shortwave 
radiometers:
global hemispheric = diffuse hemispheric + direct normal *cos (zenith angle)

• Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)

• Instantaneous Direct Normal Shortwave Irradiance, Pyrheliometer Thermopile
  Voltage(inst_direct_normal)

Calibration data interruption at TWP Nauru

Data interrupted to perform electronic calibration of data logger

• Time offset of tweaks from base_time(time_offset)
• north latitude for all the input platforms.(lat)
• Instantaneous PIR2 case thermistor(pir2_case_therm)
• Instantaneous PIR1 uncorrected irradiance(pir1_uncorr_irradiance)
• Instantaneous PIR1 dome thermistor(pir1_dome_therm)
• Instantaneous PIR1 case thermistor(pir1_case_therm)
• altitude above sea levelaltunits(alt)
• Instantaneous PIR2 uncorrected irradiance(pir2_uncorr_irradiance)
• Instantaneous UVB temperature(uvb_temp)
• Instantaneous PIR2 dome thermistor(pir2_dome_therm)
• Instantaneous UVB uncorrected irradiance(uvb_uncorr_irradiance)
• Time offset from base_time(base_time)
• GPS raw data filename(filename)
• east longitude for all the input platforms.(lon)

• east longitude for all the input platforms.(lon)
• IRT1 maximum(irt1_max)
• PSP shaded mean(psps_mean)
• PSP shaded standard deviation(psps_sd)
• NIP standard deviation(nip_sd)
• NIP minimum(nip_min)
• north latitude for all the input platforms.(lat)
• PIR1 unshaded minimum(pir1_min)
• GPS raw data filename(filename)
• PIR shaded standard deviation(pirs_sd)
• PIR1 unshaded standard deviation(pir1_sd)
• PSP shaded maximum(psps_max)
• PSP shaded minimum(psps_min)
• UVB standard deviation(uvb_sd)
• UVB maximum(uvb_max)
• PIR shaded maximum(pirs_max)
• PIR shaded minimum(pirs_min)
• IRT1 minimum(irt1_min)
• PSP1 unshaded minimum(psp1_min)
• PSP1 unshaded standard deviation(psp1_sd)
• PIR shaded mean(pirs_mean)
• Internal voltage(internal_voltage)
• Time offset from base_time(base_time)
• altitude above sea levelaltunits(alt)
• NIP mean(nip_mean)
• PSP1 unshaded maximum(psp1_max)
• External voltage(external_voltage)
• Internal Logger Temperature(logger_temp)
• IRT1 mean(irt1_mean)
• PSP1 unshaded mean(psp1_mean)
• Time offset of tweaks from base_time(time_offset)
• NIP maximum(nip_max)
• PIR1 unshaded mean(pir1_mean)
• UVB minimum(uvb_min)
• UVB mean(uvb_mean)
• IRT1 standard deviation(irt1_sd)
• PIR1 unshaded maximum(pir1_max)
• Bit data. See details.(bit_data)

• Raw data stream - documentation not supported(Raw data stream - documentation not supported)

• PSP shaded mean(psps_mean)
• IRT1 standard deviation(irt1_sd)
• north latitude for all the input platforms.(lat)
• east longitude for all the input platforms.(lon)
• IRT1 mean(irt1_mean)
• NIP mean(nip_mean)
• Internal voltage(internal_voltage)
• UVB maximum(uvb_max)
• Time offset from base_time(base_time)
• PIR shaded minimum(pirs_min)
• altitude above sea levelaltunits(alt)
• PIR1 unshaded maximum(pir1_max)
• Time offset of tweaks from base_time(time_offset)
• PSP1 unshaded maximum(psp1_max)
• Internal Logger Temperature(logger_temp)
• IRT1 minimum(irt1_min)
• PSP shaded standard deviation(psps_sd)
• IRT1 maximum(irt1_max)
• NIP maximum(nip_max)
• PIR1 unshaded standard deviation(pir1_sd)
• PSP1 unshaded standard deviation(psp1_sd)
• GPS raw data filename(filename)
• NIP standard deviation(nip_sd)
• PIR shaded mean(pirs_mean)
• PIR1 unshaded minimum(pir1_min)
• PSP shaded minimum(psps_min)
• NIP minimum(nip_min)
• PSP1 unshaded mean(psp1_mean)
• External voltage(external_voltage)
• UVB minimum(uvb_min)
• PIR1 unshaded mean(pir1_mean)
• UVB standard deviation(uvb_sd)
• PIR shaded maximum(pirs_max)
• PIR shaded standard deviation(pirs_sd)
• PSP1 unshaded minimum(psp1_min)
• PSP shaded maximum(psps_max)
• UVB mean(uvb_mean)
• Bit data. See details.(bit_data)

TWP/SKYRAD/C2 - Calibration data interruption Nauru

IRT covered with Black-Body for calibration check

• IRT1 maximum(irt1_max)
• IRT1 minimum(irt1_min)
• IRT1 standard deviation(irt1_sd)
• IRT1 mean(irt1_mean)

• Raw data stream - documentation not supported(Raw data stream - documentation not supported)

• IRT1 mean(irt1_mean)
• IRT1 standard deviation(irt1_sd)
• IRT1 minimum(irt1_min)
• IRT1 maximum(irt1_max)