TWP/SMET/C1 - Reprocess: Skewed wind direction 1 data

Wind direction 1 data is incorrect. 
Manus SMET wind direction for Wind-1 (upper unit) was apparently skewed
from its original position as a result of checking direction calibration. 

As near as we can tell the position of the sensor was rotated clockwise
Somewhere in the range of 45-90 degrees, most likely in steps 22.5 degrees.

Data comparison performed on 3-2-00, using a small amount of data from 
this instrument.

• Wind #1 direction standard deviation(wind1_dir_sd)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #1 speed vector average(wind1_spd_vec_avg)

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

• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• Wind #1 direction standard deviation(wind1_dir_sd)

TWP/SMET/C1 - Wind Direction alignment method

During RESET10 we discovered a problem with wind direction from WIND1 (upper
anemometer).  During RESET8, WIND1 was corrected by rotating the alignment
ring instead of the anemometer.  This resulted in a better agreement between
the 2 anemometers, but is not the correct way to align an anemometer. The
alignment ring was readjusted for true north and the anemometer reset in
the proper slot (the original problem).

• Wind #1 direction standard deviation(wind1_dir_sd)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #1 speed vector average(wind1_spd_vec_avg)

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

• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• Wind #1 direction standard deviation(wind1_dir_sd)

TWP/C2/SMET Wind Speeds

Beginning on December 24, Anemometer #1 (there are two anemometers on
the SMET stand) occasionally reported wind speed values that were low
relative to the other sensor.  It is clear from the data that the low
reading here is the anomalous one.

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

• Wind #1 direction standard deviation(wind1_dir_sd)
• Wind #1 speed maximum(wind1_spd_max)
• Wind #1 speed minimum(wind1_spd_min)
• Wind #1 speed standard deviation(wind1_spd_sd)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Wind #1 speed vector average(wind1_spd_vec_avg)

• Wind #1 direction standard deviation(wind1_dir_sd)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Wind #1 speed maximum(wind1_spd_max)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• Wind #1 speed standard deviation(wind1_spd_sd)
• Wind #1 speed minimum(wind1_spd_min)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Wind #1 direction vector average(wind1_dir_vec_avg)

TWP/C2/SMET Wind Speeds

Beginning on December 24, Anemometer #1 (there are two anemometers on
the SMET stand) occasionally reported wind speed values that were low
relative to the other sensor.  It is clear from the data that the low
reading here is the anomalous one.

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

• Wind #1 direction standard deviation(wind1_dir_sd)
• Wind #1 speed maximum(wind1_spd_max)
• Wind #1 speed minimum(wind1_spd_min)
• Wind #1 speed standard deviation(wind1_spd_sd)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Wind #1 speed vector average(wind1_spd_vec_avg)

• Wind #1 direction standard deviation(wind1_dir_sd)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Wind #1 speed maximum(wind1_spd_max)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• Wind #1 speed standard deviation(wind1_spd_sd)
• Wind #1 speed minimum(wind1_spd_min)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Wind #1 direction vector average(wind1_dir_vec_avg)

TWP/C2/SMET Winds Speeds

Beginning on December 24, Anemometer #1 (there are two anemometers on
the SMET stand) occasionally reported wind speed values that were low
relative to the other sensor.  It is clear from the data that the low
reading here is the anomalous one.

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

• Wind #1 direction standard deviation(wind1_dir_sd)
• Wind #1 speed maximum(wind1_spd_max)
• Wind #1 speed minimum(wind1_spd_min)
• Wind #1 speed standard deviation(wind1_spd_sd)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Wind #1 speed vector average(wind1_spd_vec_avg)

• Wind #1 direction standard deviation(wind1_dir_sd)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Wind #1 speed maximum(wind1_spd_max)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• Wind #1 speed standard deviation(wind1_spd_sd)
• Wind #1 speed minimum(wind1_spd_min)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Wind #1 direction vector average(wind1_dir_vec_avg)

TWP/C2/SMET Temperature spike

There was a brief -4 C spike in the temperature at approximately
21.5 Z on December 3.  This spike also showed up in the vapor pressure
which is calculated from the temperature and relative humidity.

• Mean Air Temperature or Hardware Error(temp_mean)
• Temperature standard deviation(temp_sd)
• Min Temperature at lowest Model Level- 1 hr(temp_min)
• Vapor pressure standard deviation(vappress_sd)
• Max Temperature at lowest Model Level- 1 hr(temp_max)
• Vapor pressure mean(vappress_mean)

• Max Temperature at lowest Model Level- 1 hr(temp_max)
• Vapor pressure standard deviation(vappress_sd)
• Vapor pressure mean(vappress_mean)
• Mean Air Temperature or Hardware Error(temp_mean)
• Temperature standard deviation(temp_sd)
• Min Temperature at lowest Model Level- 1 hr(temp_min)

TWP/C2/SMET - Pressure sensitivity to rain

The pressure behaves anomalously during rain events - even very mild
ones.  Normally, the pressure undergoes a smooth semi-diurnal
oscillation with little higher frequency variability.  However, during
and shortly after rain events, the pressure signal exhibits abrupt
changes - this sort of behavior has occasionally been observed at
Manus but not with the regularity seen here.  Examples of this
behaviour occur on (date in the form YYYYMMDD):

19981212
19981215
19981216
19981217
19981223
19981224
19981225
19981230
19981231

• Atmospheric pressure(atmos_pressure)
• Vapor pressure standard deviation(vappress_sd)
• Vapor pressure mean(vappress_mean)

• Vapor pressure standard deviation(vappress_sd)
• Vapor pressure mean(vappress_mean)
• Atmospheric pressure(atmos_pressure)

TWP/SMET/C1 - Incorrect calibration for ARCS1 Wind speed

On 23 OCT 99, during Reset 8, an incorrect slope of was entered for the 
upper, windspeed1, wind speed sensor resulting in a 1% overestimate of
the wind speed.  The correct calibration was entered on 1 APR 2000 during
RESET 10.

• Wind #1 speed standard deviation(wind1_spd_sd)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Wind #1 speed maximum(wind1_spd_max)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Wind #1 speed minimum(wind1_spd_min)
• Wind #1 speed vector average(wind1_spd_vec_avg)

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

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

• Wind #1 speed vector average(wind1_spd_vec_avg)
• Wind #1 speed maximum(wind1_spd_max)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Wind #1 speed standard deviation(wind1_spd_sd)
• Wind #1 speed minimum(wind1_spd_min)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)

TWP/SMET/C1 - Periodic spikes in temperature and water vapor pressure

Beginning on 980212 (day #43) spikes began to occur in the surface
temperature and water vapor pressure.  These spikes occur approximately
once per hour (the spacing is very regular but occasionally an hour
is skipped).  In the one-minute averaged data, the temperature spike
lasts for only one minute and dips approximately 4-5 C below the actual
temperature.  The one-minute standard deviation is more dramatic, rising
from about 0.1 to about 35.  The one minute temperature minimum is the
most easily identifiable, each hour when the spike occurs, the minimum
is -245.84.  The vapor pressure mean jumps from about 30 to over 50 and
the standard deviation jumps from less than 1 to more than 200.  This
problem was fixed by the RESET team on 980501.

• Vapor pressure mean(vappress_mean)
• Min Temperature at lowest Model Level- 1 hr(temp_min)
• Vapor pressure standard deviation(vappress_sd)
• Mean Air Temperature or Hardware Error(temp_mean)
• Temperature standard deviation(temp_sd)
• Max Temperature at lowest Model Level- 1 hr(temp_max)

• Min Temperature at lowest Model Level- 1 hr(temp_min)
• Vapor pressure standard deviation(vappress_sd)
• Vapor pressure mean(vappress_mean)
• Temperature standard deviation(temp_sd)
• Mean Air Temperature or Hardware Error(temp_mean)
• Max Temperature at lowest Model Level- 1 hr(temp_max)

TWP/SMET/C1 - Elevated relative humidity

The relative humidity has been exceeding 100% with unusual regularity.
The most dramatic case occured on December 31 when the RH exceeded 100%
for 18 hours and exceeded 103.5% for 6 hours with a maximum value of
103.8%.  A PIF was submitted to propose changing this sensor. This change
occurred on August 12, 1999.

• Relative humidity minimum(relh_min)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Relative humidity mean(relh_mean)
• Relative humidity maximum(relh_max)

• Relative humidity minimum(relh_min)
• Relative humidity maximum(relh_max)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Relative humidity mean(relh_mean)

TWP/SMET/C1 - C1 TWP  Wind speed calibration factor problem/ Wind1

Wind speed calibration factors were reversed between wind speed sensor 1 and 2.
Results in less than 1% error, but correction factors may be used.

• Wind #1 speed standard deviation(wind1_spd_sd)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Wind #1 speed maximum(wind1_spd_max)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• Wind #1 speed minimum(wind1_spd_min)

• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Wind #1 speed standard deviation(wind1_spd_sd)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• Wind #1 speed maximum(wind1_spd_max)
• Wind #1 speed minimum(wind1_spd_min)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)

TWP/SMET/C1 - C1 SMET Incorrect wind speed calibration factors

Wind speed calibration factors were reversed between wind speed sensors 1 and 2.  Error 
results in less than a 1% error in wind speed.  A correction factor may be used.

• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Wind #2 speed maximum(wind2_spd_max)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Wind #2 speed minimum(wind2_spd_min)
• Wind #2 speed standard deviation(wind2_spd_sd)

• Wind #2 speed minimum(wind2_spd_min)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Wind #2 speed standard deviation(wind2_spd_sd)
• Wind #2 speed maximum(wind2_spd_max)
• Wind #2 speed maximum gust(wind2_spd_max_gust)

TWP/SMET/C1 - precip, wind, temperature

On 10/23/01 from 4:45 to 6:45 precipitation, wind, and temperature measurements were 
directly affected by RESET14 visit activities.

• Wind #1 speed standard deviation(wind1_spd_sd)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Wind #2 speed minimum(wind2_spd_min)
• Precipitation standard deviation(precip_sd)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #2 speed standard deviation(wind2_spd_sd)
• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Wind #2 speed maximum(wind2_spd_max)
• Max Temperature at lowest Model Level- 1 hr(temp_max)
• Precipitation mean(precip_mean)
• Wind #1 speed maximum(wind1_spd_max)
• Mean Air Temperature or Hardware Error(temp_mean)
• Temperature standard deviation(temp_sd)
• precipitation minimum(precip_min)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Wind #1 direction standard deviation(wind1_dir_sd)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Precipitation maximum(precip_max)
• Min Temperature at lowest Model Level- 1 hr(temp_min)
• Wind #2 direction standard deviation(wind2_dir_sd)
• Wind #2 direction vector average(wind2_dir_vec_avg)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• Wind #1 speed minimum(wind1_spd_min)

• Precipitation mean(precip_mean)
• Min Temperature at lowest Model Level- 1 hr(temp_min)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• Wind #2 speed maximum(wind2_spd_max)
• Precipitation maximum(precip_max)
• Wind #1 direction standard deviation(wind1_dir_sd)
• Mean Air Temperature or Hardware Error(temp_mean)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Precipitation standard deviation(precip_sd)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Max Temperature at lowest Model Level- 1 hr(temp_max)
• Wind #2 speed minimum(wind2_spd_min)
• precipitation minimum(precip_min)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Wind #1 speed maximum(wind1_spd_max)
• Temperature standard deviation(temp_sd)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Wind #2 direction vector average(wind2_dir_vec_avg)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Wind #2 direction standard deviation(wind2_dir_sd)
• Wind #1 speed standard deviation(wind1_spd_sd)
• Wind #2 speed standard deviation(wind2_spd_sd)
• Wind #1 speed minimum(wind1_spd_min)

TWP/SMET/C2 - RH Sensor bad at Nauru

RH sensor bad from 16 Dec 2001 03 GMT to 3 Jan 2002

• Relative humidity mean(relh_mean)
• Relative humidity maximum(relh_max)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Relative humidity minimum(relh_min)

• Relative humidity minimum(relh_min)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Relative humidity mean(relh_mean)
• Relative humidity maximum(relh_max)

TWP/SMET/C1 - Sensor replacement

On 10/24/01 from 00:40 to 01:00 the T/RH probe was being replaced.

• Relative humidity minimum(relh_min)
• Mean Air Temperature or Hardware Error(temp_mean)
• Relative humidity mean(relh_mean)
• Temperature standard deviation(temp_sd)
• Relative humidity maximum(relh_max)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Min Temperature at lowest Model Level- 1 hr(temp_min)
• Max Temperature at lowest Model Level- 1 hr(temp_max)

• Min Temperature at lowest Model Level- 1 hr(temp_min)
• Relative humidity maximum(relh_max)
• Relative humidity mean(relh_mean)
• Temperature standard deviation(temp_sd)
• Mean Air Temperature or Hardware Error(temp_mean)
• Relative humidity minimum(relh_min)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Max Temperature at lowest Model Level- 1 hr(temp_max)

TWP - Switch to new Data Header Formats not timely

On April 1, 2001 at 00:00:00 new data header with consistent variable naming
conventions, etc were to be used for all sites, all data streams.  At the TWP
sites the time of the movement to the new convention did not occur precisely at 00:00:00.  
The following data files contain between 40 seconds and 20 minutes of data from 4/1/02 
in the old format.  The delayed format change did not affect data quality in any way.

twpgndrad60sC2.a1.20010401.000000.cdf
twpgndrad60sC2.b1.20010401.000000.cdf
twpmfrsrC2.a0.20010401.000000.cdf
twpmfrsrC2.b1.20010401.000000.cdf
twpskyrad20sC2.a1.20010401.000001.cdf
twpsmet60sC1.a1.20010401.000001.cdf
twpsmet60sC1.b1.20010401.000001.cdf
twpsmet60sC2.a1.20010401.000000.cdf
twpsmet60sC2.b1.20010401.000000.cdf

• Internal Logger Temperature(logger_temp)
• precipitation minimum(precip_min)
• GPS raw data filename(filename)
• Vapor pressure standard deviation(vappress_sd)
• Wind #1 speed minimum(wind1_spd_min)
• east longitude for all the input platforms.(lon)
• north latitude for all the input platforms.(lat)
• Time offset of tweaks from base_time(time_offset)
• Internal voltage(internal_voltage)
• Time offset from base_time(base_time)
• Wind #2 speed standard deviation(wind2_spd_sd)
• Relative humidity maximum(relh_max)
• Wind #2 speed maximum(wind2_spd_max)
• Wind #1 speed maximum(wind1_spd_max)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Min Temperature at lowest Model Level- 1 hr(temp_min)
• Temperature standard deviation(temp_sd)
• Vapor pressure mean(vappress_mean)
• Wind #2 speed minimum(wind2_spd_min)
• Atmospheric pressure(atmos_pressure)
• Wind #1 direction standard deviation(wind1_dir_sd)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• Precipitation maximum(precip_max)
• Bit data. See details.(bit_data)
• Wind #1 speed standard deviation(wind1_spd_sd)
• altitude above sea levelaltunits(alt)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Precipitation mean(precip_mean)
• Wind #2 direction standard deviation(wind2_dir_sd)
• Precipitation standard deviation(precip_sd)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• External voltage(external_voltage)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Relative humidity minimum(relh_min)
• Mean Air Temperature or Hardware Error(temp_mean)
• Relative humidity mean(relh_mean)
• Max Temperature at lowest Model Level- 1 hr(temp_max)
• Wind #2 direction vector average(wind2_dir_vec_avg)

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

• altitude above sea levelaltunits(alt)
• Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
  Maxima(up_long_hemisp_max)
• IRT1 standard deviation(irt1_sd)
• Bit data. See details.(bit_data)
• Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer(up_long_hemisp)
• Internal Logger Temperature(logger_temp)
• Net Radiation, Maxima(net_max)
• GPS raw data filename(filename)
• Effective Surface (Skin) Temperature(sfc_ir_temp)
• Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
  Minima(up_long_hemisp_min)
• Net Radiation, Minima(net_min)
• PSP1 unshaded mean(psp1_mean)
• east longitude for all the input platforms.(lon)
• Net Radiation(net)
• External voltage(external_voltage)
• PIR1 unshaded minimum(pir1_min)
• PSP1 unshaded minimum(psp1_min)
• Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)
• IRT1 maximum(irt1_max)
• IRT1 minimum(irt1_min)
• Surface Infra-Red Temperature, Standard Deviation(sfc_ir_temp_std)
• PIR1 unshaded mean(pir1_mean)
• Time offset of tweaks from base_time(time_offset)
• north latitude for all the input platforms.(lat)
• Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
  Maxima(up_short_hemisp_max)
• Net Radiation, Standard Deviation(net_std)
• Time offset from base_time(base_time)
• PIR1 unshaded maximum(pir1_max)
• PIR1 unshaded standard deviation(pir1_sd)
• Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
  Minima(up_short_hemisp_min)
• PSP1 unshaded standard deviation(psp1_sd)
• Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
  Standard Deviation(up_short_hemisp_std)
• Internal voltage(internal_voltage)
• PSP1 unshaded maximum(psp1_max)
• Surface Infra-Red Temperature Minima(sfc_ir_temp_min)
• Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer(up_short_hemisp)
• NET standard deviation(net_sd)
• IRT1 mean(irt1_mean)
• Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
  Standard Deviation(up_long_hemisp_std)
• NET mean(net_mean)

• Narrowband Hemispheric Irradiance, Filter 1, offset and cosine corrected(hemisp_narrowband_filter1)
• Narrowband Diffuse Hemispheric Irradiance, Filter 6, offset and cosine corrected(diffuse_hemisp_narrowband_filter6)
• Narrowband Hemispheric Irradiance, Filter 3, offset and cosine corrected(hemisp_narrowband_filter3)
• Time offset from base_time(base_time)
• Direct Normal Broadband Irradiance, cosine corrected, broadband scale applied(direct_normal_broadband)
• Narrowband Diffuse Hemispheric Irradiance, Filter 4, offset and cosine corrected(diffuse_hemisp_narrowband_filter4)
• Narrowband Hemispheric Irradiance, Filter 5, offset and cosine corrected(hemisp_narrowband_filter5)
• Hemispheric Broadband Irradiance, offset and cosine corrected, broadband scale
  factor applied(hemisp_broadband)
• Narrowband Diffuse Hemispheric Irradiance, Filter 3, offset and cosine corrected(diffuse_hemisp_narrowband_filter3)
• Fields flagged by callang: 0 = no flag\n,(callang_flags)
• Narrowband Direct Normal Irradiance, Filter 6, cosine corrected(direct_normal_narrowband_filter6)
• Narrowband Direct Normal Irradiance, Filter 4, cosine corrected(direct_normal_narrowband_filter4)
• Narrowband Direct Normal Irradiance, Filter 2, cosine corrected(direct_normal_narrowband_filter2)
• Detector Temperature(head_temp)
• Data Logger Supply Voltage(logger_volt)
• MFRSR Detector Temperature(mfrsr_temp)
• Diffuse Hemispheric Irradiance, MFRSR(diffuse_hemisp_narrowband)
• Hemispheric Irradiance, MFRSR(hemisp_narrowband)
• east longitude for all the input platforms.(lon)
• Narrowband Direct Normal Irradiance, Filter 1, cosine corrected(direct_normal_narrowband_filter1)
• Narrowband Hemispheric Irradiance, Filter 2, offset and cosine corrected(hemisp_narrowband_filter2)
• north latitude for all the input platforms.(lat)
• Narrowband Direct Normal Irradiance, Filter 3, cosine corrected(direct_normal_narrowband_filter3)
• Time offset of tweaks from base_time(time_offset)
• Direct Normal Irradiance, Uncalibrated Silicon Detector, NIMFR(direct_norm_broadband)
• Narrowband Hemispheric Irradiance, Filter 4, offset and cosine corrected(hemisp_narrowband_filter4)
• Narrowband Hemispheric Irradiance, Filter 6, offset and cosine corrected(hemisp_narrowband_filter6)
• Narrowband Diffuse Hemispheric Irradiance, Filter 2, offset and cosine corrected(diffuse_hemisp_narrowband_filter2)
• Narrowband Diffuse Hemispheric Irradiance, Filter 5, offset and cosine corrected(diffuse_hemisp_narrowband_filter5)
• Narrowband Direct Normal Irradiance, Filter 5, cosine corrected(direct_normal_narrowband_filter5)
• Narrowband Diffuse Hemispheric Irradiance, Filter 1, offset and cosine corrected(diffuse_hemisp_narrowband_filter1)
• altitude above sea levelaltunits(alt)
• Cosine of Apparent Solar Zenith Angle(cosine_solar_zenith_angle)
• Direct Normal Irradiance, NIMFR(direct_norm_narrowband)
• Diffuse Hemispheric Broadband Irradiance, offset subtracted, cosine corrected,
  broadband scale applied(diffuse_hemisp_broadband)

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

• Wind #1 speed maximum(wind1_spd_max)
• Time offset from base_time(base_time)
• Wind #2 speed maximum(wind2_spd_max)
• Relative humidity maximum(relh_max)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #2 direction vector average(wind2_dir_vec_avg)
• Vapor pressure mean(vappress_mean)
• Precipitation maximum(precip_max)
• Precipitation mean(precip_mean)
• Wind #1 direction standard deviation(wind1_dir_sd)
• precipitation minimum(precip_min)
• Min Temperature at lowest Model Level- 1 hr(temp_min)
• External voltage(external_voltage)
• Time offset of tweaks from base_time(time_offset)
• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Relative humidity mean(relh_mean)
• Mean Air Temperature or Hardware Error(temp_mean)
• Max Temperature at lowest Model Level- 1 hr(temp_max)
• Internal voltage(internal_voltage)
• Wind #1 speed minimum(wind1_spd_min)
• Wind #2 speed standard deviation(wind2_spd_sd)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• altitude above sea levelaltunits(alt)
• Wind #1 speed standard deviation(wind1_spd_sd)
• Wind #2 speed minimum(wind2_spd_min)
• north latitude for all the input platforms.(lat)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Bit data. See details.(bit_data)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• Precipitation standard deviation(precip_sd)
• GPS raw data filename(filename)
• Internal Logger Temperature(logger_temp)
• Wind #2 direction standard deviation(wind2_dir_sd)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Atmospheric pressure(atmos_pressure)
• Vapor pressure standard deviation(vappress_sd)
• east longitude for all the input platforms.(lon)
• Temperature standard deviation(temp_sd)
• Relative humidity minimum(relh_min)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Wind #1 speed maximum gust(wind1_spd_max_gust)

• Narrowband Direct Normal Irradiance, Filter 1, cosine corrected(direct_normal_narrowband_filter1)
• Narrowband Hemispheric Irradiance, Filter 6, offset and cosine corrected(hemisp_narrowband_filter6)
• Direct Normal Broadband Irradiance, cosine corrected, broadband scale applied(direct_normal_broadband)
• Narrowband Hemispheric Irradiance, Filter 3, offset and cosine corrected(hemisp_narrowband_filter3)
• Direct Normal Irradiance, NIMFR(direct_norm_narrowband)
• Narrowband Hemispheric Irradiance, Filter 1, offset and cosine corrected(hemisp_narrowband_filter1)
• MFRSR Detector Temperature(mfrsr_temp)
• Fields flagged by callang: 0 = no flag\n,(callang_flags)
• Narrowband Hemispheric Irradiance, Filter 5, offset and cosine corrected(hemisp_narrowband_filter5)
• Direct Normal Irradiance, Uncalibrated Silicon Detector, NIMFR(direct_norm_broadband)
• Hemispheric Broadband Irradiance (Approximate), MFRSR(total_hemisp_broadband)
• Narrowband Direct Normal Irradiance, Filter 6, cosine corrected(direct_normal_narrowband_filter6)
• Narrowband Diffuse Hemispheric Irradiance, Filter 2, offset and cosine corrected(diffuse_hemisp_narrowband_filter2)
• Narrowband Diffuse Hemispheric Irradiance, Filter 5, offset and cosine corrected(diffuse_hemisp_narrowband_filter5)
• Narrowband Direct Normal Irradiance, Filter 4, cosine corrected(direct_normal_narrowband_filter4)
• Narrowband Diffuse Hemispheric Irradiance, Filter 4, offset and cosine corrected(diffuse_hemisp_narrowband_filter4)
• Diffuse Hemispheric Broadband Irradiance, offset subtracted, cosine corrected,
  broadband scale applied(diffuse_hemisp_broadband)
• Narrowband Direct Normal Irradiance, Filter 2, cosine corrected(direct_normal_narrowband_filter2)
• altitude above sea levelaltunits(alt)
• Time offset from base_time(base_time)
• Hemispheric Irradiance, MFRSR(hemisp_narrowband)
• Narrowband Hemispheric Irradiance, Filter 2, offset and cosine corrected(hemisp_narrowband_filter2)
• Cosine of Apparent Solar Zenith Angle(cosine_solar_zenith_angle)
• east longitude for all the input platforms.(lon)
• Diffuse Hemispheric Irradiance, MFRSR(diffuse_hemisp_narrowband)
• Hemispheric Broadband Irradiance, offset and cosine corrected, broadband scale
  factor applied(hemisp_broadband)
• north latitude for all the input platforms.(lat)
• Narrowband Hemispheric Irradiance, Filter 4, offset and cosine corrected(hemisp_narrowband_filter4)
• Detector Temperature(head_temp)
• Narrowband Direct Normal Irradiance, Filter 5, cosine corrected(direct_normal_narrowband_filter5)
• Narrowband Diffuse Hemispheric Irradiance, Filter 1, offset and cosine corrected(diffuse_hemisp_narrowband_filter1)
• Time offset of tweaks from base_time(time_offset)
• Narrowband Direct Normal Irradiance, Filter 3, cosine corrected(direct_normal_narrowband_filter3)
• Narrowband Diffuse Hemispheric Irradiance, Filter 3, offset and cosine corrected(diffuse_hemisp_narrowband_filter3)
• Narrowband Diffuse Hemispheric Irradiance, Filter 6, offset and cosine corrected(diffuse_hemisp_narrowband_filter6)
• Data Logger Supply Voltage(logger_volt)

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

• Internal Logger Temperature(logger_temp)
• PIR1 unshaded minimum(pir1_min)
• east longitude for all the input platforms.(lon)
• Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
  Standard Deviation(up_long_hemisp_std)
• north latitude for all the input platforms.(lat)
• NET mean(net_mean)
• Net Radiation, Standard Deviation(net_std)
• IRT1 maximum(irt1_max)
• Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)
• PSP1 unshaded maximum(psp1_max)
• PSP1 unshaded standard deviation(psp1_sd)
• Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer(up_short_hemisp)
• IRT1 minimum(irt1_min)
• Time offset of tweaks from base_time(time_offset)
• Bit data. See details.(bit_data)
• Time offset from base_time(base_time)
• Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
  Maxima(up_short_hemisp_max)
• Internal voltage(internal_voltage)
• PSP1 unshaded minimum(psp1_min)
• altitude above sea levelaltunits(alt)
• Effective Surface (Skin) Temperature(sfc_ir_temp)
• Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer(up_long_hemisp)
• PIR1 unshaded maximum(pir1_max)
• PIR1 unshaded mean(pir1_mean)
• Net Radiation(net)
• IRT1 mean(irt1_mean)
• Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
  Standard Deviation(up_short_hemisp_std)
• NET standard deviation(net_sd)
• External voltage(external_voltage)
• Net Radiation, Minima(net_min)
• Net Radiation, Maxima(net_max)
• PIR1 unshaded standard deviation(pir1_sd)
• GPS raw data filename(filename)
• Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
  Minima(up_short_hemisp_min)
• Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
  Maxima(up_long_hemisp_max)
• Surface Infra-Red Temperature, Standard Deviation(sfc_ir_temp_std)
• Surface Infra-Red Temperature Minima(sfc_ir_temp_min)
• IRT1 standard deviation(irt1_sd)
• Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
  Minima(up_long_hemisp_min)
• PSP1 unshaded mean(psp1_mean)

• GPS raw data filename(filename)
• Wind #2 speed maximum(wind2_spd_max)
• Time offset of tweaks from base_time(time_offset)
• External voltage(external_voltage)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Relative humidity maximum(relh_max)
• Relative humidity mean(relh_mean)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Wind #1 speed maximum(wind1_spd_max)
• Wind #1 speed standard deviation(wind1_spd_sd)
• Vapor pressure standard deviation(vappress_sd)
• east longitude for all the input platforms.(lon)
• Internal voltage(internal_voltage)
• Wind #2 speed standard deviation(wind2_spd_sd)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• Precipitation maximum(precip_max)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Relative humidity minimum(relh_min)
• Wind #1 speed minimum(wind1_spd_min)
• Atmospheric pressure(atmos_pressure)
• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• north latitude for all the input platforms.(lat)
• Precipitation mean(precip_mean)
• Mean Air Temperature or Hardware Error(temp_mean)
• altitude above sea levelaltunits(alt)
• Wind #2 direction standard deviation(wind2_dir_sd)
• Min Temperature at lowest Model Level- 1 hr(temp_min)
• Wind #2 speed minimum(wind2_spd_min)
• Vapor pressure mean(vappress_mean)
• Temperature standard deviation(temp_sd)
• Wind #1 direction standard deviation(wind1_dir_sd)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Time offset from base_time(base_time)
• precipitation minimum(precip_min)
• Wind #2 direction vector average(wind2_dir_vec_avg)
• Max Temperature at lowest Model Level- 1 hr(temp_max)
• Internal Logger Temperature(logger_temp)
• Bit data. See details.(bit_data)
• Precipitation standard deviation(precip_sd)

• Mean Air Temperature or Hardware Error(temp_mean)
• Relative humidity mean(relh_mean)
• Vapor pressure standard deviation(vappress_sd)
• Wind #1 speed standard deviation(wind1_spd_sd)
• Vapor pressure mean(vappress_mean)
• Precipitation standard deviation(precip_sd)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Wind #2 direction standard deviation(wind2_dir_sd)
• External voltage(external_voltage)
• Wind #2 speed minimum(wind2_spd_min)
• GPS raw data filename(filename)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #1 speed maximum(wind1_spd_max)
• Temperature standard deviation(temp_sd)
• Time offset from base_time(base_time)
• Wind #2 speed maximum(wind2_spd_max)
• Max Temperature at lowest Model Level- 1 hr(temp_max)
• Wind #2 direction vector average(wind2_dir_vec_avg)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• Time offset of tweaks from base_time(time_offset)
• Min Temperature at lowest Model Level- 1 hr(temp_min)
• precipitation minimum(precip_min)
• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Wind #1 speed minimum(wind1_spd_min)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Precipitation mean(precip_mean)
• Relative humidity maximum(relh_max)
• Internal voltage(internal_voltage)
• Atmospheric pressure(atmos_pressure)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• north latitude for all the input platforms.(lat)
• Wind #2 speed standard deviation(wind2_spd_sd)
• Relative humidity minimum(relh_min)
• east longitude for all the input platforms.(lon)
• altitude above sea levelaltunits(alt)
• Internal Logger Temperature(logger_temp)
• Bit data. See details.(bit_data)
• Precipitation maximum(precip_max)
• Wind #1 direction standard deviation(wind1_dir_sd)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)

• Total Horizontal Irradiance, 862 nm(tot6)
• Hemispheric Broadband Irradiance, offset and cosine corrected, broadband scale
  factor applied(hemisp_broadband)
• Diffuse Horizontal Irradiance, Broadband Solar(dif1)
• Data Logger Supply Voltage(logger_volt)
• Time offset of tweaks from base_time(time_offset)
• Diffuse Horizontal Irradiance, 500 nm(dif3)
• Detector Temperature(head_temp)
• Direct-normal Irradiance, 610 nm(dirn4)
• Direct-normal Irradiance, 862 nm(dirn6)
• Narrowband Direct Normal Irradiance, Filter 2, cosine corrected(direct_normal_narrowband_filter2)
• altitude above sea levelaltunits(alt)
• Diffuse Hemispheric Broadband Irradiance, offset subtracted, cosine corrected,
  broadband scale applied(diffuse_hemisp_broadband)
• Fields flagged by callang: 0 = no flag\n,(callang_flags)
• Narrowband Hemispheric Irradiance, Filter 4, offset and cosine corrected(hemisp_narrowband_filter4)
• Narrowband Diffuse Hemispheric Irradiance, Filter 3, offset and cosine corrected(diffuse_hemisp_narrowband_filter3)
• Narrowband Diffuse Hemispheric Irradiance, Filter 1, offset and cosine corrected(diffuse_hemisp_narrowband_filter1)
• Narrowband Direct Normal Irradiance, Filter 5, cosine corrected(direct_normal_narrowband_filter5)
• Narrowband Hemispheric Irradiance, Filter 2, offset and cosine corrected(hemisp_narrowband_filter2)
• Total Horizontal Irradiance, Broadband Solar(tot1)
• Diffuse Horizontal Irradiance, 415 nm(dif2)
• Narrowband Hemispheric Irradiance, Filter 6, offset and cosine corrected(hemisp_narrowband_filter6)
• Narrowband Diffuse Hemispheric Irradiance, Filter 6, offset and cosine corrected(diffuse_hemisp_narrowband_filter6)
• Diffuse Horizontal Irradiance, 862 nm(dif6)
• Total Horizontal Irradiance, 500 nm(tot3)
• Direct-normal Irradiance, 500 nm(dirn3)
• Total Horizontal Irradiance, 665 nm(tot5)
• Direct Normal Broadband Irradiance, cosine corrected, broadband scale applied(direct_normal_broadband)
• Narrowband Direct Normal Irradiance, Filter 1, cosine corrected(direct_normal_narrowband_filter1)
• Diffuse Horizontal Irradiance, 610 nm(dif4)
• Direct-normal Irradiance, 665 nm(dirn5)
• Datalogger supply voltage(supply_voltage)
• Narrowband Direct Normal Irradiance, Filter 3, cosine corrected(direct_normal_narrowband_filter3)
• Detector temperature(detector_temp)
• Time offset from base_time(base_time)
• Direct-normal Irradiance, 940 nm(dirn7)
• Total Horizontal Irradiance, 940 nm(tot7)
• Narrowband Diffuse Hemispheric Irradiance, Filter 2, offset and cosine corrected(diffuse_hemisp_narrowband_filter2)
• Narrowband Hemispheric Irradiance, Filter 5, offset and cosine corrected(hemisp_narrowband_filter5)
• Narrowband Diffuse Hemispheric Irradiance, Filter 4, offset and cosine corrected(diffuse_hemisp_narrowband_filter4)
• Narrowband Diffuse Hemispheric Irradiance, Filter 5, offset and cosine corrected(diffuse_hemisp_narrowband_filter5)
• Narrowband Hemispheric Irradiance, Filter 1, offset and cosine corrected(hemisp_narrowband_filter1)
• east longitude for all the input platforms.(lon)
• Diffuse Horizontal Irradiance, 665 nm(dif5)
• Narrowband Direct Normal Irradiance, Filter 4, cosine corrected(direct_normal_narrowband_filter4)
• Narrowband Direct Normal Irradiance, Filter 6, cosine corrected(direct_normal_narrowband_filter6)
• Narrowband Hemispheric Irradiance, Filter 3, offset and cosine corrected(hemisp_narrowband_filter3)
• Direct-normal Irradiance, 415 nm(dirn2)
• north latitude for all the input platforms.(lat)
• Diffuse Horizontal Irradiance, 940 nm(dif7)
• Total Horizontal Irradiance, 610 nm(tot4)
• Direct-normal Irradiance, Broadband Solar(dirn1)
• Total Horizontal Irradiance, 415 nm(tot2)

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.

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

• Wind #1 direction standard deviation(wind1_dir_sd)
• Wind #1 speed maximum(wind1_spd_max)
• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Wind #1 speed standard deviation(wind1_spd_sd)
• Time offset from base_time(base_time)
• Internal Logger Temperature(logger_temp)
• Wind #2 direction standard deviation(wind2_dir_sd)
• precipitation minimum(precip_min)
• Wind #2 speed minimum(wind2_spd_min)
• Vapor pressure mean(vappress_mean)
• Internal voltage(internal_voltage)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Wind #1 speed minimum(wind1_spd_min)
• Min Temperature at lowest Model Level- 1 hr(temp_min)
• Atmospheric pressure(atmos_pressure)
• Wind #2 speed standard deviation(wind2_spd_sd)
• Vapor pressure standard deviation(vappress_sd)
• north latitude for all the input platforms.(lat)
• Precipitation maximum(precip_max)
• External voltage(external_voltage)
• Precipitation standard deviation(precip_sd)
• Relative humidity mean(relh_mean)
• Mean Air Temperature or Hardware Error(temp_mean)
• Max Temperature at lowest Model Level- 1 hr(temp_max)
• east longitude for all the input platforms.(lon)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Bit data. See details.(bit_data)
• Time offset of tweaks from base_time(time_offset)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• Wind #2 speed maximum(wind2_spd_max)
• GPS raw data filename(filename)
• Temperature standard deviation(temp_sd)
• altitude above sea levelaltunits(alt)
• Relative humidity minimum(relh_min)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Relative humidity maximum(relh_max)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #2 direction vector average(wind2_dir_vec_avg)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Precipitation mean(precip_mean)

• Precipitation standard deviation(precip_sd)
• Relative humidity minimum(relh_min)
• altitude above sea levelaltunits(alt)
• precipitation minimum(precip_min)
• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Wind #1 speed maximum(wind1_spd_max)
• Internal voltage(internal_voltage)
• Temperature standard deviation(temp_sd)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Time offset from base_time(base_time)
• Wind #1 speed minimum(wind1_spd_min)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Mean Air Temperature or Hardware Error(temp_mean)
• Precipitation maximum(precip_max)
• Wind #2 speed maximum(wind2_spd_max)
• Wind #2 direction standard deviation(wind2_dir_sd)
• External voltage(external_voltage)
• Atmospheric pressure(atmos_pressure)
• Wind #1 direction standard deviation(wind1_dir_sd)
• Wind #2 speed minimum(wind2_spd_min)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• north latitude for all the input platforms.(lat)
• Relative humidity mean(relh_mean)
• Max Temperature at lowest Model Level- 1 hr(temp_max)
• GPS raw data filename(filename)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #2 direction vector average(wind2_dir_vec_avg)
• Vapor pressure standard deviation(vappress_sd)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Wind #2 speed standard deviation(wind2_spd_sd)
• east longitude for all the input platforms.(lon)
• Precipitation mean(precip_mean)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• Internal Logger Temperature(logger_temp)
• Relative humidity maximum(relh_max)
• Wind #1 speed standard deviation(wind1_spd_sd)
• Time offset of tweaks from base_time(time_offset)
• Bit data. See details.(bit_data)
• Vapor pressure mean(vappress_mean)
• Min Temperature at lowest Model Level- 1 hr(temp_min)

TWP/C1 - Incorrect elevation reported in Manus Data

(From Bill Clements) We have been using 6m MSL as the station
elevation of Momote (Manus).  This was based on information
posted near the station barometer in the Momote Weather Service
Office.  It turns out that the official WMO station elevation
for Momote is 4m MSL and the upper air elevation is 5m MSL.

All Manus instruments except the sonde station are at 4m MSL.
The sonde launching station is at 5m MSL.

• altitude above sea levelaltunits(alt)

• altitude above sea levelaltunits(alt)

• altitude above sea levelaltunits(alt)

• altitude above sea levelaltunits(alt)

• altitude above sea levelaltunits(alt)

TWP/MET/C3 - WIND DIRECTION SENSOR #2 MISALIGNED

Wind direction sensor #2 was misaligned and off by 15 degrees.

• Wind #2 direction vector average(wind2_dir_vec_avg)
• Wind #2 direction standard deviation(wind2_dir_sd)

• Wind #2 direction standard deviation(wind2_dir_sd)
• Wind #2 direction vector average(wind2_dir_vec_avg)

TWP/SMET/C2 - Temperature Sensor Failed, Data Missing

The T/RH sensor on Nauru failed and was replaced (only the temperature sensor failed).

• Mean Air Temperature or Hardware Error(temp_mean)
• Temperature standard deviation(temp_sd)
• Min Temperature at lowest Model Level- 1 hr(temp_min)
• Max Temperature at lowest Model Level- 1 hr(temp_max)

• Max Temperature at lowest Model Level- 1 hr(temp_max)
• Mean Air Temperature or Hardware Error(temp_mean)
• Temperature standard deviation(temp_sd)
• Min Temperature at lowest Model Level- 1 hr(temp_min)

TWP/SMET/C3 - Intermittent Pressure Sensor Failure

The Barometric Pressure sensor was intermittently failing at TWP site C3 Darwin.  At times 
there were large pressure fluctuations occurring on the order of 24 mb in a few minutes. 
 Times of large pressure fluctuations are readily apparent in the data.  At these times 
the data should be carefully analyzed before determining it's usefulness.  In between the 
periods of large fluctuations the readings appear to be stable.  It is still suggested 
that independent pressure data be obtained for comparison before use.

• Atmospheric pressure(atmos_pressure)

• Atmospheric pressure(atmos_pressure)

TWP/SMET/C1 - Reprocess: Miscalibrated windspeed2 data

A replacement anemometer (WSP2) was installed but the new anemometer calibration 
coefficients were not put into the logger. The multiplication factor was 0.09708 when it should 
have been 0.09763 (very small difference)the offset was 0.36 when it should have been 0.3 
(a difference 0.06 m/s).

• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Wind #2 speed maximum(wind2_spd_max)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Wind #2 speed minimum(wind2_spd_min)

• Wind #2 speed minimum(wind2_spd_min)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Wind #2 speed maximum(wind2_spd_max)
• Wind #2 speed maximum gust(wind2_spd_max_gust)

TWP/SMET/C1 - Reprocess: Wind Speed #2 incorrect

Wind Speed #2 sensor was reporting values 10 times above the actual value.  During an 
update to the logger configuration file the calibration multiplier was incorrectly entered.  
The multiplier inserted was .97630 when it should have been .09763.  This caused the 
readings from this sensor to be incorrect.

• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Wind #2 speed maximum(wind2_spd_max)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Wind #2 speed minimum(wind2_spd_min)
• Wind #2 speed standard deviation(wind2_spd_sd)

• Wind #2 speed minimum(wind2_spd_min)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Wind #2 speed standard deviation(wind2_spd_sd)
• Wind #2 speed maximum(wind2_spd_max)
• Wind #2 speed maximum gust(wind2_spd_max_gust)

TWP/SMET/C2 -  WIND SENSOR #1 (HIGHER) INOPERATIVE

Wind speed sensor #1 (higher sensor) failed.  Wind speeds were reported as 0 m/s and wind 
direction data was not in agreement with wind sensor #2. Anemometer was replaced.

• Wind #1 direction standard deviation(wind1_dir_sd)
• Wind #1 speed minimum(wind1_spd_min)
• Wind #1 speed maximum(wind1_spd_max)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #1 speed standard deviation(wind1_spd_sd)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Wind #1 speed vector average(wind1_spd_vec_avg)

TWP/SMET/C3 - Data reported at 15sec rather than 60s intervals

Data in these data streams should be reports at 60sec intervals, but
the logger program running during this time had the interval set to
15s.  Users will have to average the 15sec data to get 60sec data.

• Vapor pressure mean(vappress_mean)
• External voltage(external_voltage)
• Min Temperature at lowest Model Level- 1 hr(temp_min)
• Precipitation standard deviation(precip_sd)
• Time offset from base_time(base_time)
• Precipitation mean(precip_mean)
• Atmospheric pressure(atmos_pressure)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #2 speed maximum(wind2_spd_max)
• Wind #2 speed standard deviation(wind2_spd_sd)
• Wind #1 speed minimum(wind1_spd_min)
• north latitude for all the input platforms.(lat)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• altitude above sea levelaltunits(alt)
• Internal Logger Temperature(logger_temp)
• Temperature standard deviation(temp_sd)
• Vapor pressure standard deviation(vappress_sd)
• Relative humidity maximum(relh_max)
• Mean Air Temperature or Hardware Error(temp_mean)
• east longitude for all the input platforms.(lon)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Relative humidity mean(relh_mean)
• Time offset of tweaks from base_time(time_offset)
• Relative humidity minimum(relh_min)
• Wind #2 direction standard deviation(wind2_dir_sd)
• Bit data. See details.(bit_data)
• Wind #2 direction vector average(wind2_dir_vec_avg)
• Wind #1 speed standard deviation(wind1_spd_sd)
• Wind #2 speed minimum(wind2_spd_min)
• Internal voltage(internal_voltage)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• Max Temperature at lowest Model Level- 1 hr(temp_max)
• precipitation minimum(precip_min)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Wind #1 speed maximum(wind1_spd_max)
• Precipitation maximum(precip_max)
• Wind #1 direction standard deviation(wind1_dir_sd)
• Wind #2 speed maximum gust(wind2_spd_max_gust)

• Time offset of tweaks from base_time(time_offset)
• Precipitation maximum(precip_max)
• Internal voltage(internal_voltage)
• Wind #1 speed minimum(wind1_spd_min)
• Wind #2 speed maximum(wind2_spd_max)
• Wind #1 direction standard deviation(wind1_dir_sd)
• Wind #2 speed minimum(wind2_spd_min)
• Wind #1 speed maximum(wind1_spd_max)
• Mean Air Temperature or Hardware Error(temp_mean)
• Max Temperature at lowest Model Level- 1 hr(temp_max)
• Atmospheric pressure(atmos_pressure)
• Relative humidity maximum(relh_max)
• Relative humidity mean(relh_mean)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #1 speed standard deviation(wind1_spd_sd)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Relative humidity minimum(relh_min)
• Bit data. See details.(bit_data)
• Min Temperature at lowest Model Level- 1 hr(temp_min)
• altitude above sea levelaltunits(alt)
• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Precipitation standard deviation(precip_sd)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• east longitude for all the input platforms.(lon)
• Wind #2 direction standard deviation(wind2_dir_sd)
• Wind #2 speed standard deviation(wind2_spd_sd)
• External voltage(external_voltage)
• north latitude for all the input platforms.(lat)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Internal Logger Temperature(logger_temp)
• precipitation minimum(precip_min)
• Vapor pressure mean(vappress_mean)
• Vapor pressure standard deviation(vappress_sd)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• Wind #2 direction vector average(wind2_dir_vec_avg)
• Precipitation mean(precip_mean)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Time offset from base_time(base_time)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Temperature standard deviation(temp_sd)

TWP/SMET/C1 - Tower Lowered for Cal Activities

Tower lowered for instrument calibration

• Wind #1 speed standard deviation(wind1_spd_sd)
• Vapor pressure mean(vappress_mean)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Wind #2 speed minimum(wind2_spd_min)
• Precipitation standard deviation(precip_sd)
• Wind #2 speed standard deviation(wind2_spd_sd)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Wind #2 speed maximum(wind2_spd_max)
• Max Temperature at lowest Model Level- 1 hr(temp_max)
• Precipitation mean(precip_mean)
• Relative humidity minimum(relh_min)
• Wind #1 speed maximum(wind1_spd_max)
• Vapor pressure standard deviation(vappress_sd)
• Mean Air Temperature or Hardware Error(temp_mean)
• Relative humidity mean(relh_mean)
• Temperature standard deviation(temp_sd)
• precipitation minimum(precip_min)
• Relative humidity maximum(relh_max)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Wind #1 direction standard deviation(wind1_dir_sd)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Precipitation maximum(precip_max)
• Min Temperature at lowest Model Level- 1 hr(temp_min)
• Wind #2 direction standard deviation(wind2_dir_sd)
• Wind #2 direction vector average(wind2_dir_vec_avg)
• Wind #1 speed minimum(wind1_spd_min)
• Wind #1 speed vector average(wind1_spd_vec_avg)

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

TWP/SMET/C2 - Wind Sensor failure

Wind sensor #2 (lower one) failed.  Wind direction showed little or
no variation, unlike the colocated sensor #1.  This caused lower
wind speed values as the sensor was not rotating properly to orient
itself parallel to the wind stream.  The sensor was replaced.

• Wind #2 speed maximum(wind2_spd_max)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Wind #2 direction standard deviation(wind2_dir_sd)
• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Wind #2 direction vector average(wind2_dir_vec_avg)
• Wind #2 speed standard deviation(wind2_spd_sd)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Wind #2 speed minimum(wind2_spd_min)

TWP/SMET/C1 - Poor Performing Sensor

On 4/23/2004 condensation was found inside the target area of the ORG lens. A spare was 
sent and installed but did not solve the problem of high background voltage values causing 
rainrate values to be recorded during no rainfall.  Values range anywhere from 0.06 to 
0.12 mm/hr.  

A new Optical Rain Gage was installed on 01/19/2005 @ 13:30 GMT alleviating the high 
background voltage values that lead to consistent rainfall rates of around 0.11 to 0.15 mm/hr 
on a consistent basis.  

The formula used to calculate rainfall rates from the new Optical Rain Gage is:  RR 
(mm/hr) = 25(V^1.87) - 0.15.

Older model formula = 20(V^2) - 0.05

The two formulas result in comparable data.

• Precipitation mean(precip_mean)
• Precipitation maximum(precip_max)
• Precipitation standard deviation(precip_sd)
• precipitation minimum(precip_min)

TWP/SMET/C3 - Rain blocked pressure port

Atmospheric pressure values were suspect due to anomolous readings during heavy rain 
events.  Suspect blockage of port due to rainfall.  New logger and enclosure corrected problem.

• Atmospheric pressure(atmos_pressure)

TWP/SMET/C3 - Data missing due to Logger Change

All Data from this site are missing during this time period due to a change of the 
collection system, logger and enclosure.  Data resumed after change.

• External voltage(external_voltage)
• north latitude for all the input platforms.(lat)
• Time offset of tweaks from base_time(time_offset)
• Precipitation maximum(precip_max)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Internal voltage(internal_voltage)
• Wind #1 speed minimum(wind1_spd_min)
• Internal Logger Temperature(logger_temp)
• Wind #2 speed maximum(wind2_spd_max)
• precipitation minimum(precip_min)
• Wind #1 direction standard deviation(wind1_dir_sd)
• Wind #2 speed minimum(wind2_spd_min)
• Wind #1 speed maximum(wind1_spd_max)
• Mean Air Temperature or Hardware Error(temp_mean)
• Max Temperature at lowest Model Level- 1 hr(temp_max)
• Vapor pressure mean(vappress_mean)
• Atmospheric pressure(atmos_pressure)
• Vapor pressure standard deviation(vappress_sd)
• Relative humidity mean(relh_mean)
• Relative humidity maximum(relh_max)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #1 speed standard deviation(wind1_spd_sd)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• Wind #2 direction vector average(wind2_dir_vec_avg)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Relative humidity minimum(relh_min)
• Bit data. See details.(bit_data)
• Precipitation mean(precip_mean)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Time offset from base_time(base_time)
• Min Temperature at lowest Model Level- 1 hr(temp_min)
• altitude above sea levelaltunits(alt)
• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Precipitation standard deviation(precip_sd)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• east longitude for all the input platforms.(lon)
• Wind #2 direction standard deviation(wind2_dir_sd)
• Wind #2 speed standard deviation(wind2_spd_sd)
• Temperature standard deviation(temp_sd)

TWP/SMET/C2 - All data missing due to logger change

All data are missing at this site during this time period due to collection system, logger 
and enclosure change.  Data resumed after change.

• Relative humidity mean(relh_mean)
• Wind #1 direction standard deviation(wind1_dir_sd)
• Mean Air Temperature or Hardware Error(temp_mean)
• Wind #1 speed maximum(wind1_spd_max)
• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Wind #1 speed standard deviation(wind1_spd_sd)
• Time offset from base_time(base_time)
• Max Temperature at lowest Model Level- 1 hr(temp_max)
• east longitude for all the input platforms.(lon)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Internal Logger Temperature(logger_temp)
• Bit data. See details.(bit_data)
• Time offset of tweaks from base_time(time_offset)
• Wind #2 direction standard deviation(wind2_dir_sd)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• precipitation minimum(precip_min)
• Wind #2 speed minimum(wind2_spd_min)
• Vapor pressure mean(vappress_mean)
• Internal voltage(internal_voltage)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Wind #2 speed maximum(wind2_spd_max)
• Wind #1 speed minimum(wind1_spd_min)
• GPS raw data filename(filename)
• Temperature standard deviation(temp_sd)
• Min Temperature at lowest Model Level- 1 hr(temp_min)
• Atmospheric pressure(atmos_pressure)
• altitude above sea levelaltunits(alt)
• Relative humidity minimum(relh_min)
• Wind #2 speed standard deviation(wind2_spd_sd)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Vapor pressure standard deviation(vappress_sd)
• north latitude for all the input platforms.(lat)
• Relative humidity maximum(relh_max)
• Precipitation maximum(precip_max)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• External voltage(external_voltage)
• Wind #2 direction vector average(wind2_dir_vec_avg)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Precipitation mean(precip_mean)
• Precipitation standard deviation(precip_sd)

TWP/SMET/C2 - connection and timing issues with new logger

Atmospheric pressure data are intermittent during this time period due to connection 
problems and program timing issues with new logger installation.  Data resumed normal 
operations after this time period.

• Atmospheric pressure(atmos_pressure)

TWP/SMET/C2 - Negative rainfall rates

Due to limitations of the Zeno dataloggers all voltage measurements
from the optical rain gauge (ORG) were converted to rainfall rates. 
This resulted in negative values for rain rates.  Any value below
0.10 mm/hr should be considered to be 0 mm/hr.  New dataloggers 
alleviated this problem.

• Precipitation maximum(precip_max)
• Precipitation mean(precip_mean)
• precipitation minimum(precip_min)
• Precipitation standard deviation(precip_sd)

TWP/SMET/C3 - Negative rainfall rates

Due to limitations of the Zeno dataloggers all voltage measurements
from the optical rain gauge (ORG) were converted to rainfall rates. 
This resulted in negative values for rain rates.  Any value below
0.10 mm/hr should be considered to be 0 mm/hr.  New dataloggers 
alleviated this problem.

• Precipitation mean(precip_mean)
• Precipitation maximum(precip_max)
• Precipitation standard deviation(precip_sd)
• precipitation minimum(precip_min)

TWP/SMET/C1 - RESET14 activities

RESET14 activities may have affected data in subtle ways during this
period.

• Wind #2 speed standard deviation(wind2_spd_sd)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Max Temperature at lowest Model Level- 1 hr(temp_max)
• Precipitation mean(precip_mean)
• Temperature standard deviation(temp_sd)
• precipitation minimum(precip_min)
• Relative humidity maximum(relh_max)
• Precipitation maximum(precip_max)
• Wind #2 direction standard deviation(wind2_dir_sd)
• Wind #1 speed standard deviation(wind1_spd_sd)
• Vapor pressure mean(vappress_mean)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Wind #2 speed minimum(wind2_spd_min)
• Precipitation standard deviation(precip_sd)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Wind #2 speed maximum(wind2_spd_max)
• Atmospheric pressure(atmos_pressure)
• Relative humidity minimum(relh_min)
• Wind #1 speed maximum(wind1_spd_max)
• Vapor pressure standard deviation(vappress_sd)
• Mean Air Temperature or Hardware Error(temp_mean)
• Relative humidity mean(relh_mean)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Wind #1 direction standard deviation(wind1_dir_sd)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Min Temperature at lowest Model Level- 1 hr(temp_min)
• Wind #2 direction vector average(wind2_dir_vec_avg)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• Wind #1 speed minimum(wind1_spd_min)

• Wind #1 speed vector average(wind1_spd_vec_avg)
• Precipitation maximum(precip_max)
• Wind #1 direction standard deviation(wind1_dir_sd)
• Mean Air Temperature or Hardware Error(temp_mean)
• Max Temperature at lowest Model Level- 1 hr(temp_max)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Wind #1 speed maximum(wind1_spd_max)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Wind #2 direction standard deviation(wind2_dir_sd)
• Wind #1 speed standard deviation(wind1_spd_sd)
• Relative humidity minimum(relh_min)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Wind #1 speed minimum(wind1_spd_min)
• Precipitation mean(precip_mean)
• Min Temperature at lowest Model Level- 1 hr(temp_min)
• Vapor pressure standard deviation(vappress_sd)
• Wind #2 speed maximum(wind2_spd_max)
• Atmospheric pressure(atmos_pressure)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Precipitation standard deviation(precip_sd)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Wind #2 speed minimum(wind2_spd_min)
• precipitation minimum(precip_min)
• Relative humidity maximum(relh_max)
• Relative humidity mean(relh_mean)
• Vapor pressure mean(vappress_mean)
• Temperature standard deviation(temp_sd)
• Wind #2 direction vector average(wind2_dir_vec_avg)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Wind #2 speed standard deviation(wind2_spd_sd)

TWP/SMET/C2 - Incorrect rainrate equation used.

There are two different Optical Raingages in use at the TWP sites.  The incorrect equation 
was used at this site.  The incorrect equation is (25*(V^1.87)) - 0.15.
The correct equation is (20*(V^2)) - 0.05.  The correct equation was installed.

• Precipitation maximum(precip_max)
• Precipitation mean(precip_mean)
• precipitation minimum(precip_min)
• Precipitation standard deviation(precip_sd)

TWP/SMET/C1 - Incorrect rainrate equation used

There are two different Optical Raingages in use at the TWP sites.  The incorrect equation 
was used at this site.  The incorrect equation is (25*(V^1.87)) - 0.15.
The correct equation is (20*(V^2)) - 0.05.  The correct equation was installed.

• Precipitation mean(precip_mean)
• Precipitation maximum(precip_max)
• Precipitation standard deviation(precip_sd)
• precipitation minimum(precip_min)

TWP/SMET/C3 - Data non-representative

Tower mast was lowered for inspection.  Data during this time is non-representative.

• Precipitation maximum(precip_max)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Wind #1 speed minimum(wind1_spd_min)
• Wind #2 speed maximum(wind2_spd_max)
• precipitation minimum(precip_min)
• Wind #1 direction standard deviation(wind1_dir_sd)
• Mean Air Temperature or Hardware Error(temp_mean)
• Wind #1 speed maximum(wind1_spd_max)
• Wind #2 speed minimum(wind2_spd_min)
• Max Temperature at lowest Model Level- 1 hr(temp_max)
• Vapor pressure mean(vappress_mean)
• Atmospheric pressure(atmos_pressure)
• Vapor pressure standard deviation(vappress_sd)
• Relative humidity mean(relh_mean)
• Relative humidity maximum(relh_max)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #1 speed standard deviation(wind1_spd_sd)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• Wind #2 direction vector average(wind2_dir_vec_avg)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Relative humidity minimum(relh_min)
• Precipitation mean(precip_mean)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Min Temperature at lowest Model Level- 1 hr(temp_min)
• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Precipitation standard deviation(precip_sd)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Wind #2 direction standard deviation(wind2_dir_sd)
• Wind #2 speed standard deviation(wind2_spd_sd)
• Temperature standard deviation(temp_sd)

TWP/SMET/C2 - Instrument failure

Upper wind sensor failed. Wind direction was reported at a near constant value of 69 
degrees and was significantly different than the lower wind sensor's direction values. Sensor 
replaced.

• Wind #1 direction standard deviation(wind1_dir_sd)
• Wind #1 direction vector average(wind1_dir_vec_avg)

TWP/SMET/C2 - Upper wind sensor failure

After replacement on 03/03/2005 the upper wind sensor began reporting erroneous values 
again on 03/09/2005 becoming very apparent after 03/17/2005.  Wind speed data appears 
reasonable but the wind direction data do not agree well with the lower wind sensor.

• Wind #1 direction standard deviation(wind1_dir_sd)
• Wind #1 direction vector average(wind1_dir_vec_avg)

TWP/SMET/C3 - Instrument logger problem, Sensor failure

The wind_lower direction sensor failed on 4/14 and disagrees significantly with the 
wind_upper direction.  The wind_lower sensor reports a constant value around 0-15 degrees since 
it failed.  Testing showed that excitation channel two on the logger was the problem.  
Logger was replaced by spare.

• Wind #2 direction standard deviation(wind2_dir_sd)
• Wind #2 direction vector average(wind2_dir_vec_avg)

TWP/SMET/C1 - Negative rainfall rates

Due to limitations of the Zeno dataloggers all voltage measurements
from the optical rain gauge (ORG) were converted to rainfall rates. 
This resulted in negative values for rain rates.  Any value below 0.10 mm/hr should be 
considered to be 0 mm/hr.  New dataloggers 
alleviated this problem.  New loggers were installed 03/09/2004 @ 2243 GMT.

• Precipitation mean(precip_mean)
• Precipitation maximum(precip_max)
• Precipitation standard deviation(precip_sd)
• precipitation minimum(precip_min)

TWP/SMET/C2 - RH failure

The RH values were frequently over MAX value of 104% starting on 7/10/2005 through end of 
period.  Sensor was replaced.

• Relative humidity mean(relh_mean)
• Relative humidity maximum(relh_max)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Relative humidity minimum(relh_min)

TWP/SMET/C3 - Data not representative

Tower was lowered for radiometer change and characterization.  Wind, temp and RH data not 
representative of local conditions.

• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Wind #1 speed minimum(wind1_spd_min)
• Wind #2 speed maximum(wind2_spd_max)
• Wind #1 direction standard deviation(wind1_dir_sd)
• Mean Air Temperature or Hardware Error(temp_mean)
• Wind #1 speed maximum(wind1_spd_max)
• Wind #2 speed minimum(wind2_spd_min)
• Max Temperature at lowest Model Level- 1 hr(temp_max)
• Vapor pressure mean(vappress_mean)
• Vapor pressure standard deviation(vappress_sd)
• Relative humidity mean(relh_mean)
• Relative humidity maximum(relh_max)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #1 speed standard deviation(wind1_spd_sd)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Wind #2 direction vector average(wind2_dir_vec_avg)
• Relative humidity minimum(relh_min)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Min Temperature at lowest Model Level- 1 hr(temp_min)
• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Wind #2 speed standard deviation(wind2_spd_sd)
• Wind #2 direction standard deviation(wind2_dir_sd)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Temperature standard deviation(temp_sd)

TWP/SMET/C3 - Towrr lowered for sensor comparisons, data not representative

The tower was lowered for radiometer change and comparisons.  During the time period the 
data listed was not representative.

• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Wind #1 speed minimum(wind1_spd_min)
• Wind #2 speed maximum(wind2_spd_max)
• Wind #1 direction standard deviation(wind1_dir_sd)
• Mean Air Temperature or Hardware Error(temp_mean)
• Wind #1 speed maximum(wind1_spd_max)
• Wind #2 speed minimum(wind2_spd_min)
• Max Temperature at lowest Model Level- 1 hr(temp_max)
• Vapor pressure mean(vappress_mean)
• Vapor pressure standard deviation(vappress_sd)
• Relative humidity mean(relh_mean)
• Relative humidity maximum(relh_max)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #1 speed standard deviation(wind1_spd_sd)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Wind #2 direction vector average(wind2_dir_vec_avg)
• Relative humidity minimum(relh_min)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Min Temperature at lowest Model Level- 1 hr(temp_min)
• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Wind #2 speed standard deviation(wind2_spd_sd)
• Wind #2 direction standard deviation(wind2_dir_sd)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Temperature standard deviation(temp_sd)

TWP/SMET/C2 - Instrument maintenance

Instrument calibration and testing were taking place for brief periods.

• Relative humidity mean(relh_mean)
• Wind #1 direction standard deviation(wind1_dir_sd)
• Mean Air Temperature or Hardware Error(temp_mean)
• Wind #1 speed maximum(wind1_spd_max)
• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Wind #1 speed standard deviation(wind1_spd_sd)
• Max Temperature at lowest Model Level- 1 hr(temp_max)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Wind #2 direction standard deviation(wind2_dir_sd)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Vapor pressure mean(vappress_mean)
• Wind #2 speed minimum(wind2_spd_min)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Wind #1 speed minimum(wind1_spd_min)
• Wind #2 speed maximum(wind2_spd_max)
• Temperature standard deviation(temp_sd)
• Min Temperature at lowest Model Level- 1 hr(temp_min)
• Wind #2 speed standard deviation(wind2_spd_sd)
• Relative humidity minimum(relh_min)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Vapor pressure standard deviation(vappress_sd)
• Relative humidity maximum(relh_max)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #2 direction vector average(wind2_dir_vec_avg)
• Wind #1 speed maximum gust(wind1_spd_max_gust)

TWP/SMET/C2 - ORG data incorrect

Data from the ORG was incorrect due to heavy condensation on the lens.

• Precipitation maximum(precip_max)
• Precipitation mean(precip_mean)
• precipitation minimum(precip_min)
• Precipitation standard deviation(precip_sd)

TWP/SMET/C2 - Tower down for calibration activities

Tower lowered, wind vanes spun at different frequencies, and ORG tested with electronic 
rain.

• Relative humidity mean(relh_mean)
• Wind #1 direction standard deviation(wind1_dir_sd)
• Mean Air Temperature or Hardware Error(temp_mean)
• Wind #1 speed maximum(wind1_spd_max)
• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Wind #1 speed standard deviation(wind1_spd_sd)
• Max Temperature at lowest Model Level- 1 hr(temp_max)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Wind #2 direction standard deviation(wind2_dir_sd)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• precipitation minimum(precip_min)
• Vapor pressure mean(vappress_mean)
• Wind #2 speed minimum(wind2_spd_min)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Wind #1 speed minimum(wind1_spd_min)
• Wind #2 speed maximum(wind2_spd_max)
• Temperature standard deviation(temp_sd)
• Min Temperature at lowest Model Level- 1 hr(temp_min)
• Relative humidity minimum(relh_min)
• Wind #2 speed standard deviation(wind2_spd_sd)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Vapor pressure standard deviation(vappress_sd)
• Precipitation maximum(precip_max)
• Relative humidity maximum(relh_max)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #2 direction vector average(wind2_dir_vec_avg)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Precipitation mean(precip_mean)
• Precipitation standard deviation(precip_sd)

TWP/SMET/C3 - Upper wind sensor failure

A lightning strike destroyed the upper (#1) wind sensor.

• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #1 speed minimum(wind1_spd_min)
• Wind #1 speed maximum(wind1_spd_max)
• Wind #1 speed standard deviation(wind1_spd_sd)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• Wind #1 direction standard deviation(wind1_dir_sd)

TWP/SMET/C3 - RH Values Artificially High

Lightning strike caused RH readings to be higher than reasonable (130%).

• Vapor pressure standard deviation(vappress_sd)
• Relative humidity mean(relh_mean)
• Relative humidity maximum(relh_max)
• Vapor pressure mean(vappress_mean)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Relative humidity minimum(relh_min)

TWP/SMET/C3 - Instrument failure

A lightning strike caused a failure in the ORG.  Rainfall was being continually recorded.

• Precipitation mean(precip_mean)
• Precipitation maximum(precip_max)
• Precipitation standard deviation(precip_sd)
• precipitation minimum(precip_min)

TWP/SMET/C3 - ORG data noisy due to degraded ground

SMET Rain Data began to be noisy during December 2005 and the problem slowly became worse 
over time so that in February 2006 the ORG was reporting with a constant background value 
of around 0.10 mm/hr rain rate.  ORG voltage showed a near constant value above the 85mV 
threshold.  The ground for the ORG had become degraded and was lost due to corrosion.

• Precipitation mean(precip_mean)
• Precipitation maximum(precip_max)
• Precipitation standard deviation(precip_sd)
• precipitation minimum(precip_min)

TWP/SMET/C3 - Reprocess: Windspeed2 calibration error

The lower anemometer was replaced afer being removed in anticipation of cyclone Monica. 
The calibration coefficient was not changed during this period so the wind speeds are a 
little low (0.2%).

• Wind #2 speed vector average(wind2_spd_vec_avg)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Wind #2 speed minimum(wind2_spd_min)
• Wind #2 speed maximum(wind2_spd_max)
• Wind #2 speed standard deviation(wind2_spd_sd)

TWP/SMET/C1 - Upper wind speed sensor failure

The upper wind speed sensor was binding at low wind speeds.  Comparison to the lower wind 
sensor showed that the upper sensor flat-lines for long periods of time.  The upper 
anemometer was replaced.

• Wind #1 speed standard deviation(wind1_spd_sd)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Wind #1 direction standard deviation(wind1_dir_sd)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Wind #1 speed maximum(wind1_spd_max)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• Wind #1 speed minimum(wind1_spd_min)

TWP/SMET/C2 - Temp/RH probe failure

Temperature/RH probe failed and was replaced.

• Relative humidity mean(relh_mean)
• Mean Air Temperature or Hardware Error(temp_mean)
• Relative humidity maximum(relh_max)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Temperature standard deviation(temp_sd)
• Min Temperature at lowest Model Level- 1 hr(temp_min)
• Relative humidity minimum(relh_min)
• Vapor pressure standard deviation(vappress_sd)
• Max Temperature at lowest Model Level- 1 hr(temp_max)
• Vapor pressure mean(vappress_mean)

TWP/SMET/C3 - Anemometer Readings Incorrect

The Anemometer readings were incorrect due to the tower being lowered for maintenance.

• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Wind #1 speed minimum(wind1_spd_min)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #1 speed standard deviation(wind1_spd_sd)
• Wind #2 speed maximum(wind2_spd_max)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• Wind #2 direction vector average(wind2_dir_vec_avg)
• Wind #1 direction standard deviation(wind1_dir_sd)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Wind #1 speed maximum(wind1_spd_max)
• Wind #2 speed minimum(wind2_spd_min)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Wind #2 direction standard deviation(wind2_dir_sd)
• Wind #2 speed standard deviation(wind2_spd_sd)

TWP/SMET/C1 - Reprocess: Barometric Data Changed from hPa to kPa

Barometric pressure data was converted from hPa to kPa in order to standardize the 
measurement units among ARM sites and to conform to accepted standard units determined by the 
scientific community.

• Atmospheric pressure(atmos_pressure)

TWP/SMET/C2 - Reprocess: Barometric Data Changed from hPa to kPa

Barometric pressure data was converted from hPa to kPa in order to standardize the 
measurement units among ARM sites and to conform to accepted standard units determined by the 
scientific community.

• Atmospheric pressure(atmos_pressure)

TWP/SMET/C3 - Reprocess: Barometric Data Changed from hPa to kPa

Barometric pressure data was converted from hPa to kPa in order to standardize the 
measurement units among ARM sites and to conform to accepted standard units determined by the 
scientific community.

• Atmospheric pressure(atmos_pressure)

TWP/SMET/C1 - Reprocess: Tipping bucket rain gauge added

A tipping bucket rain gauge was added to the TWP.C1 SMET suite of instruments on 20061017. 
 Effective 20060926, two new variables (count and rain amount) were added to the end of 
the twpsmet60sC1.b1 datastream.  Between 9/26 and 10/17, the data for these two variables 
are filled with zeros.  Users should not use the data during this period as the zeros 
are not representative of the rain fall at the site.  When reprocessing of this datastream 
occurs these variables will be added for the 19961009-20060926 and data from 
19961009-20061017 will be filled with -9999 (missing).

• Time offset from base_time(base_time)

TWP/SMET/C2 - Reprocess: Tipping bucket rain gauge added

A tipping bucket rain gauge was added to the TWP.C2 SMET suite of instruments on 20061129. 
Effective 20060926, two new variables (count and rain amount) were added to the end of 
the twpsmet60sC2.b1 datastream.  Between 9/26 and 11/29, the data for these two variables 
are filled with zeros.  Users should not use the data during this period as the zeros are 
not representative of the rain fall at the site.  When reprocessing of this datastream 
occurs these variables will be added for the 19981021-20060926 and data from 
19981021-20061129 will be filled with -9999 (missing).

• Time offset from base_time(base_time)

TWP/SMET/C3 - Reprocess: Tipping bucket rain gauge added

A tipping bucket rain gauge was added to the SMET suite of instruments effective 20060926. 
 Two new variables (count and rain amount) were added at the end of the twpsmet60sC1.b1 
datastream.  When reprocessing of this datastream occurs these variables will be added 
with -9999 (missing) as the value for dates prior to gauge installation.

• Time offset from base_time(base_time)

TWP/SMET/C1 - Surface pressure spike

A spike occured in the surface pressure.  The reported pressure rose as
high as 1300 hPa but returned to normal levels after 15 minutes.

• Atmospheric pressure(atmos_pressure)

Calibration interruption at TWP Nauru

Occasional calibration interuption occured while calibration SMET instruments

• Internal voltage(internal_voltage)
• Time offset from base_time(base_time)
• Wind #2 speed standard deviation(wind2_spd_sd)
• Internal Logger Temperature(logger_temp)
• east longitude for all the input platforms.(lon)
• External voltage(external_voltage)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• north latitude for all the input platforms.(lat)
• Max Temperature at lowest Model Level- 1 hr(temp_max)
• Precipitation mean(precip_mean)
• Temperature standard deviation(temp_sd)
• precipitation minimum(precip_min)
• Relative humidity maximum(relh_max)
• Time offset of tweaks from base_time(time_offset)
• Precipitation maximum(precip_max)
• Bit data. See details.(bit_data)
• Wind #2 direction standard deviation(wind2_dir_sd)
• Wind #1 speed standard deviation(wind1_spd_sd)
• altitude above sea levelaltunits(alt)
• Vapor pressure mean(vappress_mean)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Wind #2 speed minimum(wind2_spd_min)
• Precipitation standard deviation(precip_sd)
• GPS raw data filename(filename)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Wind #2 speed maximum(wind2_spd_max)
• Atmospheric pressure(atmos_pressure)
• Relative humidity minimum(relh_min)
• Wind #1 speed maximum(wind1_spd_max)
• Vapor pressure standard deviation(vappress_sd)
• Relative humidity mean(relh_mean)
• Mean Air Temperature or Hardware Error(temp_mean)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Wind #1 direction standard deviation(wind1_dir_sd)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Min Temperature at lowest Model Level- 1 hr(temp_min)
• Wind #2 direction vector average(wind2_dir_vec_avg)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• Wind #1 speed minimum(wind1_spd_min)

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

• Wind #1 speed vector average(wind1_spd_vec_avg)
• Precipitation maximum(precip_max)
• Wind #1 direction standard deviation(wind1_dir_sd)
• Mean Air Temperature or Hardware Error(temp_mean)
• altitude above sea levelaltunits(alt)
• Max Temperature at lowest Model Level- 1 hr(temp_max)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Wind #1 speed maximum(wind1_spd_max)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Wind #2 direction standard deviation(wind2_dir_sd)
• Wind #1 speed standard deviation(wind1_spd_sd)
• Relative humidity minimum(relh_min)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Wind #1 speed minimum(wind1_spd_min)
• GPS raw data filename(filename)
• Internal Logger Temperature(logger_temp)
• Bit data. See details.(bit_data)
• Precipitation mean(precip_mean)
• Time offset from base_time(base_time)
• Min Temperature at lowest Model Level- 1 hr(temp_min)
• Vapor pressure standard deviation(vappress_sd)
• Wind #2 speed maximum(wind2_spd_max)
• Atmospheric pressure(atmos_pressure)
• Time offset of tweaks from base_time(time_offset)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Precipitation standard deviation(precip_sd)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Wind #2 speed minimum(wind2_spd_min)
• precipitation minimum(precip_min)
• Relative humidity maximum(relh_max)
• Vapor pressure mean(vappress_mean)
• Relative humidity mean(relh_mean)
• east longitude for all the input platforms.(lon)
• Temperature standard deviation(temp_sd)
• Wind #2 direction vector average(wind2_dir_vec_avg)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• External voltage(external_voltage)
• Internal voltage(internal_voltage)
• Wind #2 speed standard deviation(wind2_spd_sd)
• north latitude for all the input platforms.(lat)