DQR ID | Subject | Data Streams Affected |
---|
D030922.4 | SGP/SIRS/E27 - Tracker Misalignment | sgpsirs20sE27.a0, sgpsirsE27.00, sgpsirsE27.b1 |
D031020.1 | SGP/SIRS/E1 - failed SIRS multiplexer | sgpsirs20sE1.a0, sgpsirsE1.00, sgpsirsE1.b1 |
D031020.2 | SGP/SIRS/E9 - Possible instrument drift | sgpsirs20sE9.a0, sgpsirsE9.00, sgpsirsE9.b1 |
D031020.3 | SGP/SIRS/E18 - Instrument noise problem | sgpsirs20sE18.a0, sgpsirsE18.00, sgpsirsE18.b1 |
D031020.4 | SGP/SIRS/E21 - Bird Poop Contamination | sgpsirs20sE21.a0, sgpsirsE21.00, sgpsirsE21.b1 |
D031118.1 | SGP/SIRS/E1 - Unknown - Downwelling shaded longwave measurement incorrect | sgpsirs20sE1.a0, sgpsirsE1.00, sgpsirsE1.b1 |
D031124.8 | SGP/SIRS/E7 - Unknown problem with downwelling shortwave instrument (Eppley PSP) | sgpsirs20sE7.a0, sgpsirsE7.00, sgpsirsE7.b1 |
D031208.6 | SGP/SIRS/E4 - Shadowband Misalignment | sgpsirs20sE4.a0, sgpsirsE4.00, sgpsirsE4.b1 |
D040126.3 | SGP/SIRS/E21 - False signal | sgpsirs20sE21.a0, sgpsirsE21.00, sgpsirsE21.b1 |
D060630.17 | SGP/SIRS/E9 - Reprocessed: Longwave Calibration error | sgpsirsE9.b1 |
D060630.20 | SGP/SIRS/E12 - Reprocessed: Longwave Calibration error | sgpsirsE12.b1 |
D060630.21 | SGP/SIRS/E13 - Reprocessed: Longwave Calibration error | sgpsirsE13.b1 |
D060630.22 | SGP/SIRS/E15 - Reprocessed: Longwave Calibration error | sgpsirsE15.b1 |
D060630.23 | SGP/SIRS/E16 - Reprocessed: Longwave Calibration error | sgpsirsE16.b1 |
D060630.24 | SGP/SIRS/E18 - Reprocessed: Longwave Calibration error | sgpsirsE18.b1 |
D060630.25 | SGP/SIRS/E19 - Reprocessed: Longwave Calibration error | sgpsirsE19.b1 |
D060630.26 | SGP/SIRS/E20 - Reprocessed: Longwave Calibration error | sgpsirsE20.b1 |
D060630.27 | SGP/SIRS/E21 - Reprocessed: Longwave Calibration error | sgpsirsE21.b1 |
D060630.28 | SGP/SIRS/E22 - Reprocessed: Longwave Calibration error | sgpsirsE22.b1 |
D060630.29 | SGP/SIRS/E24 - Reprocessed: Longwave Calibration error | sgpsirsE24.b1 |
D060630.30 | SGP/SIRS/E27 - Reprocessed: Longwave Calibration error | sgpsirsE27.b1 |
D060630.8 | SGP/SIRS/C1 - Reprocessed: Longwave Calibration error | sgpsirsC1.b1 |
Subject: | SGP/SIRS/E27 - Tracker Misalignment |
DataStreams: | sgpsirs20sE27.a0, sgpsirsE27.00, sgpsirsE27.b1
|
Description: | Suntracker failed at this facility. The suntracker was reset on
9/17, but this only temporarily fixed the problem and the tracker
began failing again 9/18. Tracker was reset and realigned on
10/15/03 17:30GMT and has been operating properly since. |
Measurements: | sgpsirsE27.00: - Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpsirsE27.b1: - Shortwave Direct Normal Irradiance, Pyrgeometer, Maxima(short_direct_normal_max)
- Shortwave Direct Normal Irradiance, Pyrgeometer, Minima(short_direct_normal_min)
- Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
Minima(down_short_diffuse_hemisp_min) - Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
Maxima(down_short_diffuse_hemisp_max) - Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
- Shortwave Direct Normal Irradiance, Pyrgeometer, Standard Deviation(short_direct_normal_std)
- Shortwave Direct Normal Irradiance, Pyrgeometer(short_direct_normal)
- Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Standard Deviation(down_short_diffuse_hemisp_std)
sgpsirs20sE27.a0: - Instantaneous Uncorrected Downwelling Shortwave Diffuse, Shaded Pyranometer
Thermopile Voltage(inst_diffuse) - Instantaneous Direct Normal Shortwave Irradiance, Pyheliometer Thermopile
Voltage(inst_direct_normal)
|
Subject: | SGP/SIRS/E1 - failed SIRS multiplexer |
DataStreams: | sgpsirs20sE1.a0, sgpsirsE1.00, sgpsirsE1.b1
|
Description: | Beginning 10/14, a failed multiplexer resulted in missing
downwelling shortwave data and downwelling and upwelling
longwave data which were much too low. The multiplexer
handles data for the longwave instruments (UIR and DIR)
case and dome temperatures as well as the downwelling shortwave
hemispheric instrument (DS). |
Measurements: | sgpsirs20sE1.a0: - 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 Hemispheric Shortwave, Unshaded Pyranometer Thermopile
Voltage(inst_global) - Instantaneous Upwelling Pyrgeometer Dome Thermistor Resistance, Pyrgeometer(inst_up_long_dome_resist)
- Instantaneous Upwelling Pyrgeometer Case Thermistor Resistance, Pyrgeometer(inst_up_long_case_resist)
sgpsirsE1.b1: - Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Minima(down_long_hemisp_shaded_min)
- Instantaneous Case Temperature(inst_up_long_case_temp)
- Instantaneous Downwelling Pyrgeometer Case Thermistor Temperature, Shaded
Pyrgeometer(inst_down_long_shaded_case_temp) - Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
- Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer, Minima(up_long_hemisp_min)
- Instantaneous Downwelling Pyrgeometer Dome Thermistor Temperature, Shaded
Pyrgeometer(inst_down_long_shaded_dome_temp) - Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Standard
Deviation(down_short_hemisp_std) - Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
- Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
- Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer(up_long_hemisp)
- Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded)
- Instantaneous Dome Temperature(inst_up_long_dome_temp)
- Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
- Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer, Standard
Deviation(up_long_hemisp_std) - Down-welling unshaded pyranometer voltage(down_short_hemisp)
- Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Standard
Deviation(down_long_hemisp_shaded_std)
sgpsirsE1.00: - Raw data stream - documentation not supported(Raw data stream - documentation not supported)
|
Subject: | SGP/SIRS/E9 - Possible instrument drift |
DataStreams: | sgpsirs20sE9.a0, sgpsirsE9.00, sgpsirsE9.b1
|
Description: | Downwelling shortwave values were too low, dropping below -10 W/m^2
at night and reading 30-50 W/m^2 lower than DS calculated from
direct and diffuse measurements during the day. This problem became
more noticeable beginning on 10/14, when nighttime values began to
drop below -10 W/m^2 consistently. The problem was corrected with
the annual instrument changout on 10/23/03.
Although the downwelling shortwave instrument (DS) appears to be the
problem a more likely scenario is that the cable connections became
thermopile. The instrument changeout possibly reseated and corrected
any poor connections. |
Measurements: | sgpsirs20sE9.a0: - Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile
Voltage(inst_global)
sgpsirsE9.b1: - Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Standard
Deviation(down_short_hemisp_std) - Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
- Down-welling unshaded pyranometer voltage(down_short_hemisp)
- Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
sgpsirsE9.00: - Raw data stream - documentation not supported(Raw data stream - documentation not supported)
|
Subject: | SGP/SIRS/E18 - Instrument noise problem |
DataStreams: | sgpsirs20sE18.a0, sgpsirsE18.00, sgpsirsE18.b1
|
Description: | Upwelling longwave data was somewhat noisy during this period. There
was a direct relation to the case and dome thermistor measurements for
the upwelling longwave PIR (UIR). Data quality does not appear to be
greatly affected overall, though instantaneous values had greater
than usual variability. The noise disappeared on 10/19. |
Measurements: | sgpsirs20sE18.a0: - Instantaneous Upwelling Pyrgeometer Case Thermistor Resistance, Pyrgeometer(inst_up_long_case_resist)
- Instantaneous Upwelling Pyrgeometer Dome Thermistor Resistance, Pyrgeometer(inst_up_long_dome_resist)
sgpsirsE18.b1: - Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer, Minima(up_long_hemisp_min)
- Instantaneous Case Temperature(inst_up_long_case_temp)
- Instantaneous Dome Temperature(inst_up_long_dome_temp)
- Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer, Standard
Deviation(up_long_hemisp_std) - Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer(up_long_hemisp)
- Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max)
sgpsirsE18.00: - Raw data stream - documentation not supported(Raw data stream - documentation not supported)
|
Subject: | SGP/SIRS/E21 - Bird Poop Contamination |
DataStreams: | sgpsirs20sE21.a0, sgpsirsE21.00, sgpsirsE21.b1
|
Description: | Downwelling shortwave values were erratic during the day on 10/18 and in very poor
agreement at times with downwelling shortwave values calculated from direct and diffuse
measurements. Bi-weekly preventative maintenace records indicate bird poop was cleaned from the
downwelling shortwave instrument on 10/29 at 16:30. Review of maintenance records and
instrument data indicate no bird contamination since 10/29.
Turkey vultures are the usual suspects in data quality problems at this facility. The
RBD(rotating bird deterrent) had failed the week of 10/13 and is awaiting parts. However,
beginning in late October the birds had left the site. |
Measurements: | sgpsirsE21.00: - Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpsirs20sE21.a0: - Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile
Voltage(inst_global)
sgpsirsE21.b1: - Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
- Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
- Down-welling unshaded pyranometer voltage(down_short_hemisp)
- Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Standard
Deviation(down_short_hemisp_std)
|
Subject: | SGP/SIRS/E1 - Unknown - Downwelling shaded longwave measurement incorrect |
DataStreams: | sgpsirs20sE1.a0, sgpsirsE1.00, sgpsirsE1.b1
|
Description: | Downwelling longwave values were very noisy and out of range
due to a missing PIR case temperature measurement. Faulty
wiring to the case temperature thermistor on the downwelling
longwave IR instrument (PIR) was the likely cause of
the problem.
On 11/18, the E1 tracker and associated instruments (direct
shortwave -NIP, hemispheric shaded shortwave -8-48 and
hemispheric shaded longwave - problem PIR) were moved to a new
tracker stand. Rewiring the instrument corrected the problem. |
Measurements: | sgpsirs20sE1.a0: - Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
Pyrgeometer(inst_down_long_shaded_case_resist)
sgpsirsE1.b1: - Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Minima(down_long_hemisp_shaded_min)
- Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded)
- Instantaneous Downwelling Pyrgeometer Case Thermistor Temperature, Shaded
Pyrgeometer(inst_down_long_shaded_case_temp) - Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
- Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Standard
Deviation(down_long_hemisp_shaded_std)
sgpsirsE1.00: - Raw data stream - documentation not supported(Raw data stream - documentation not supported)
|
Subject: | SGP/SIRS/E7 - Unknown problem with downwelling shortwave instrument (Eppley PSP) |
DataStreams: | sgpsirs20sE7.a0, sgpsirsE7.00, sgpsirsE7.b1
|
Description: | Beginning around 0317 UTC, 11/21, downwelling shortwave values became anamolously high
during the night, when they should have been around zero. Values returned to normal after
SGP technicians reseated this instruments connections at 1215UTC 12/02/2003. The following
day's data appeared normal. Appears that a poor connection was the culprit this time. |
Measurements: | sgpsirs20sE7.a0: - Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile
Voltage(inst_global)
sgpsirsE7.b1: - Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
- Down-welling unshaded pyranometer voltage(down_short_hemisp)
- Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Standard
Deviation(down_short_hemisp_std) - Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
sgpsirsE7.00: - Raw data stream - documentation not supported(Raw data stream - documentation not supported)
|
Subject: | SGP/SIRS/E4 - Shadowband Misalignment |
DataStreams: | sgpsirs20sE4.a0, sgpsirsE4.00, sgpsirsE4.b1
|
Description: | The solar tracker failed on 12/4, resulting in bad direct and
diffuse measurements. The tracker started working again on 12/8
without Ops intervention. Technician maintenance checks on 12/3
and 12/17 reported correct tracker operation. |
Measurements: | sgpsirsE4.00: - Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpsirsE4.b1: - Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
- Shortwave Direct Normal Irradiance, Pyrgeometer, Minima(short_direct_normal_min)
- Shortwave Direct Normal Irradiance, Pyrgeometer(short_direct_normal)
- Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Standard Deviation(down_short_diffuse_hemisp_std)
- Shortwave Direct Normal Irradiance, Pyrgeometer, Maxima(short_direct_normal_max)
- Shortwave Direct Normal Irradiance, Pyrgeometer, Standard Deviation(short_direct_normal_std)
- Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
Minima(down_short_diffuse_hemisp_min) - Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
Maxima(down_short_diffuse_hemisp_max)
sgpsirs20sE4.a0: - Instantaneous Direct Normal Shortwave Irradiance, Pyheliometer Thermopile
Voltage(inst_direct_normal) - Instantaneous Uncorrected Downwelling Shortwave Diffuse, Shaded Pyranometer
Thermopile Voltage(inst_diffuse)
|
Subject: | SGP/SIRS/E21 - False signal |
DataStreams: | sgpsirs20sE21.a0, sgpsirsE21.00, sgpsirsE21.b1
|
Description: | During clear-sky conditions, downwelling shortwave values spike downward approximately 50
to 200 W/m^2 around 22:15 UTC for about 15 minutes. This problem occurs at about the same
time for the same duration each day during the indicated period of the year. This
effect is due to a shadow from the Rotating Bird Deterrent (RBD) installed earlier in the year
to prevent extensive bird droppings at the site. The RBD is installed at such a
location that it will partially shade the downwelling shortwave PSP from 19 October to 23
February of the year. |
Measurements: | sgpsirsE21.00: - Raw data stream - documentation not supported(Raw data stream - documentation not supported)
sgpsirs20sE21.a0: - Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile
Voltage(inst_global)
sgpsirsE21.b1: - Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
- Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
- Down-welling unshaded pyranometer voltage(down_short_hemisp)
- Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Standard
Deviation(down_short_hemisp_std)
|