DQRs for Session: 102855 User:hdenekeCompleted: 11-27-2006

Data Quality Reports for Session: 102855 User: hdeneke Completed: 11/27/2006

TABLE OF CONTENTS

DQR ID	Subject	Data Streams Affected
D040205.1	SGP/SIRS/E1/E2/E3/E5/E8 - Snow on Radiometers	sgpsirsE1.00, sgpsirsE1.b1, sgpsirsE2.00, sgpsirsE2.b1, sgpsirsE3.00, sgpsirsE3.b1, sgpsirsE5.00, sgpsirsE5.b1, sgpsirsE8.00, sgpsirsE8.b1, sgpsirs20sE1.a0, sgpsirs20sE2.a0, sgpsirs20sE3.a0, sgpsirs20sE5.a0, sgpsirs20sE8.a0
D040226.1	SGP/SIRS/E9 - PSP dome contamination	sgpsirsE9.00, sgpsirsE9.b1, sgpsirs20sE9.a0
D040226.2	SGP/SIRS/E11 - PSP dome contamination	sgpsirsE11.00, sgpsirsE11.b1, sgpsirs20sE11.a0
D040320.2	SGP/SIRS/E8 - Possible Contamination of DS PSP instrument	sgpsirsE8.00, sgpsirsE8.b1, sgpsirs20sE8.a0
D040420.4	SGP/SIRS/E27 - incorrect tracking	sgpsirsE27.00, sgpsirsE27.b1, sgpsirs20sE27.a0
D040706.1	SGP/SIRS/E22 - Failed NIP sensor cable	sgpsirsE22.00, sgpsirsE22.b1, sgpsirs20sE22.a0
D040712.3	SGP/SIRS/E24 - NIP shaded near sunrise	sgpsirsE24.b1, sgpsirs20sE24.a0
D040907.1	SGP/SIRS/C1/E13 - Incorrect calibration coefficients	sgpsirsC1.00, sgpsirsC1.b1, sgpsirsE13.00, sgpsirsE13.b1, sgpsirs20sC1.a0, sgpsirs20sE13.a0
D050117.1	SGP/SIRS/E9 - Unknown -failed PSP ventilator fan	sgpsirsE9.00, sgpsirsE9.b1, sgpsirs20sE9.a0
D050131.22	SGP/SIRS/E11 - Ice storm	sgpsirsE11.b1, sgpsirs20sE11.a0
D050131.28	SGP/SIRS/E8 - Ice storm	sgpsirsE8.b1, sgpsirs20sE8.a0
D050131.29	SGP/SIRS/E9 - Ice storm	sgpsirsE9.b1, sgpsirs20sE9.a0
D050227.1	SGP/SIRS/E24 - Erratic downwelling shortwave data	sgpsirsE24.00, sgpsirsE24.b1, sgpsirs20sE24.a0
D050412.3	SGP/SIRS/E24 - Dirt on dome	sgpsirsE24.00, sgpsirsE24.b1, sgpsirs20sE24.a0
D050414.2	SGP/SIRS/E9 - Downwelling Shortwave values low	sgpsirsE9.00, sgpsirsE9.b1, sgpsirs20sE9.a0
D050520.1	SGP/SIRS/E22 - Intermittent upwelling longwave data loss	sgpsirsE22.00, sgpsirsE22.b1, sgpsirs20sE22.a0
D050621.1	SGP/SIRS/E9 - Sensor cable failure	sgpsirsE9.00, sgpsirsE9.b1, sgpsirs20sE9.a0
D050801.1	SGP/SIRS/E8 - Downwelling Shortwave hemispheric (PSP) Dome Contamination	sgpsirsE8.00, sgpsirsE8.b1, sgpsirs20sE8.a0
D050929.1	SGP/SIRS/C1 - sun tracker power failure	sgpsirsC1.00, sgpsirsC1.b1, sgpsirs20sC1.a0
D051117.1	SGP/SIRS/E24 - Reprocess: Incorrect calibration coefficients	sgpsirsE24.00, sgpsirsE24.b1, sgpsirs20sE24.a0
D060403.1	SGP/SIRS/E11 - failed ventilator fan	sgpsirsE11.00, sgpsirsE11.b1, sgpsirs20sE11.a0

DQRID : D040205.1

Start Date	Start Time	End Date	End Time
02/02/2004	1200	02/02/2004	2000

Subject:	SGP/SIRS/E1/E2/E3/E5/E8 - Snow on Radiometers
DataStreams:	sgpsirsE1.00, sgpsirsE1.b1, sgpsirsE2.00, sgpsirsE2.b1, sgpsirsE3.00, sgpsirsE3.b1, sgpsirsE5.00, sgpsirsE5.b1, sgpsirsE8.00, sgpsirsE8.b1, sgpsirs20sE1.a0, sgpsirs20sE2.a0, sgpsirs20sE3.a0, sgpsirs20sE5.a0, sgpsirs20sE8.a0
Description:	A large discrepancy between the measured values of downwelling hemispheric shortwave radiation and the derived values occurred on 2/02 at the listed sites. The difference is on the order of 200 Wm^(-2) at E2 and to a lesser extent at the other affected stations. This problem most likely resulted from a previous day or night snow/ice accumulation on the Direct(NIP), Downwelling Sortwave(PSP) and/or Downwelling Diffuse(8-48) instruments. During the morning hours of 02/02, Approx 1300-2000GMT, snow/ice was covering one or more of these three instruments resulting in faulty readings and incorrect derived downwelling shortwave values as well. Instrument readings indicate the problem resolved itself later in the day through normal meltoff.
Measurements:	sgpsirs20sE5.a0: Instantaneous Direct Normal Shortwave Irradiance, Pyrheliometer Thermopile Voltage(inst_direct_normal) Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile Voltage(inst_global) Instantaneous Uncorrected Downwelling Shortwave Diffuse, Shaded Pyranometer Thermopile Voltage(inst_diffuse) sgpsirsE2.b1: Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max) Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard Deviation(down_short_hemisp_std) Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp) Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Standard Deviation(down_short_diffuse_hemisp_std) Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_short_hemisp_min) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min) sgpsirsE1.00: Raw data stream - documentation not supported(Raw data stream - documentation not supported) sgpsirsE2.00: Raw data stream - documentation not supported(Raw data stream - documentation not supported) sgpsirs20sE3.a0: Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile Voltage(inst_global) Instantaneous Direct Normal Shortwave Irradiance, Pyrheliometer Thermopile Voltage(inst_direct_normal) Instantaneous Uncorrected Downwelling Shortwave Diffuse, Shaded Pyranometer Thermopile Voltage(inst_diffuse) sgpsirsE3.b1: Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_short_hemisp_min) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp) Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std) Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min) Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard Deviation(down_short_hemisp_std) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Standard Deviation(down_short_diffuse_hemisp_std) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max) sgpsirs20sE1.a0: Instantaneous Uncorrected Downwelling Shortwave Diffuse, Shaded Pyranometer Thermopile Voltage(inst_diffuse) Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile Voltage(inst_global) Instantaneous Direct Normal Shortwave Irradiance, Pyrheliometer Thermopile Voltage(inst_direct_normal) sgpsirsE8.00: Raw data stream - documentation not supported(Raw data stream - documentation not supported) sgpsirsE3.00: Raw data stream - documentation not supported(Raw data stream - documentation not supported) sgpsirsE5.b1: Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min) Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_short_hemisp_min) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp) Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Standard Deviation(down_short_diffuse_hemisp_std) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max) Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard Deviation(down_short_hemisp_std) sgpsirsE1.b1: Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max) Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max) Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Standard Deviation(down_short_diffuse_hemisp_std) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard Deviation(down_short_hemisp_std) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_short_hemisp_min) Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp) sgpsirsE5.00: Raw data stream - documentation not supported(Raw data stream - documentation not supported) sgpsirs20sE2.a0: Instantaneous Direct Normal Shortwave Irradiance, Pyrheliometer Thermopile Voltage(inst_direct_normal) Instantaneous Uncorrected Downwelling Shortwave Diffuse, Shaded Pyranometer Thermopile Voltage(inst_diffuse) Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile Voltage(inst_global) sgpsirs20sE8.a0: Instantaneous Uncorrected Downwelling Shortwave Diffuse, Shaded Pyranometer Thermopile Voltage(inst_diffuse) Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile Voltage(inst_global) Instantaneous Direct Normal Shortwave Irradiance, Pyrheliometer Thermopile Voltage(inst_direct_normal) sgpsirsE8.b1: 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, Pyrheliometer, Minima(short_direct_normal_min) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_short_hemisp_min) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Standard Deviation(down_short_diffuse_hemisp_std) Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max) Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard Deviation(down_short_hemisp_std) Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)

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DQRID : D040226.1

Start Date	Start Time	End Date	End Time
02/20/2004	1600	02/23/2004	0500

Subject:	SGP/SIRS/E9 - PSP dome contamination
DataStreams:	sgpsirsE9.00, sgpsirsE9.b1, sgpsirs20sE9.a0
Description:	Measured values of diffuse shortwave downwelling radiation fluctuated below derived values of downwelling shortwave radiation by 50 W/m^2 during the afternoon hours under clear conditions. SMOS precipitation and wind speed data reveals rain and wind the night before on 02/20/03 0100 GMT probably contaminated the PSP dome with dirt. Precipitation of .25mm on 02/23/04 0300 seems to have effectively cleared the PSP dome since PSP data on 02/24/04 compares correctly to direct and diffuse components.
Measurements:	sgpsirs20sE9.a0: Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile Voltage(inst_global) sgpsirsE9.b1: Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard Deviation(down_short_hemisp_std) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_short_hemisp_min) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max) sgpsirsE9.00: Raw data stream - documentation not supported(Raw data stream - documentation not supported)

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DQRID : D040226.2

Start Date	Start Time	End Date	End Time
02/20/2004	1500	03/01/2004	1300

Subject:	SGP/SIRS/E11 - PSP dome contamination
DataStreams:	sgpsirsE11.00, sgpsirsE11.b1, sgpsirs20sE11.a0
Description:	Measured values of diffuse shortwave downwelling radiation fluctuated below derived values of downwelling shortwave radiation during the afternoon hours under clear conditions, probably due to a dirty PSP dome. SMOS precipitation and wind speed data reveal rain and wind on 02/19/03 at 2300 GMT probably contaminated the PSP dome with dirt. Precipitation of .4mm on 02/29/04 1400 seems to have effectively cleared the PSP dome since PSP data on 03/01/04 compares correctly to direct and diffuse components.
Measurements:	sgpsirsE11.b1: Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_short_hemisp_min) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard Deviation(down_short_hemisp_std) sgpsirsE11.00: Raw data stream - documentation not supported(Raw data stream - documentation not supported) sgpsirs20sE11.a0: Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile Voltage(inst_global)

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DQRID : D040320.2

Start Date	Start Time	End Date	End Time
03/15/2004	1500	03/31/2004	1200

Subject:	SGP/SIRS/E8 - Possible Contamination of DS PSP instrument
DataStreams:	sgpsirsE8.00, sgpsirsE8.b1, sgpsirs20sE8.a0
Description:	Downwelling hemispheric shortwave values drop at about 1500 GMT under clear sky conditions, typically from about 14:00GMT to 16:00GMT. This may be due to a dirty PSP but maintenance on 03/23/04 18:11 GMT revealed no more than typical light dust. The problem was essentially undetectable by 03/31/04 12:00. The time of day that the problem exists appears to be an exagerated PSP cosine response. No obvious reason presents why the problem appeared and then disappeared within this two week period.
Measurements:	sgpsirsE8.00: Raw data stream - documentation not supported(Raw data stream - documentation not supported) sgpsirs20sE8.a0: Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile Voltage(inst_global) sgpsirsE8.b1: Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_short_hemisp_min) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard Deviation(down_short_hemisp_std)

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DQRID : D040420.4

Start Date	Start Time	End Date	End Time
04/14/2004	1700	09/15/2004	1650
10/27/2004	1500	11/05/2004	1900

Subject:	SGP/SIRS/E27 - incorrect tracking
DataStreams:	sgpsirsE27.00, sgpsirsE27.b1, sgpsirs20sE27.a0
Description:	The solar tracker at E27 was not functioning properly. The problem affected tracker mounted instruments: downwelling diffuse 8-48 and direct normal pyrheliometer NIP. After tracker adjustment on 4/14/2004 1700GMT the tracker stopped tracking properly during afternoon hours. Attempts to correct tracker operation throughout the failure period resulted in variations on incorrect tracker operation. No replacement tracker was available. After adjustment on 9/15/2004 the tracker problem was resolved. It is unclear what, other than typical az and zen tracker software changes by field techs, corrected the problem. This problem period corresponds to the first time range specified (4/14 to 9/15). On 10/27/2004 a replacement tracker was installed at E27. Technical difficulties kept tracker out of service until 11/05/2004. The replacement tracker at E27 was put into serice by the field techs on 11/05/2004 1830GMT. The tracker has been tracking correctly since this time. This problem period corresponds to the second time range (10/27 to 11/05).
Measurements:	sgpsirsE27.00: Raw data stream - documentation not supported(Raw data stream - documentation not supported) sgpsirsE27.b1: Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max) Shortwave Direct Normal Irradiance, Pyrheliometer, 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, Pyrheliometer, Standard Deviation(short_direct_normal_std) Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated 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, Pyrheliometer Thermopile Voltage(inst_direct_normal)

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DQRID : D040706.1

Start Date	Start Time	End Date	End Time
06/30/2004	0156	07/07/2004	1800

Subject:	SGP/SIRS/E22 - Failed NIP sensor cable
DataStreams:	sgpsirsE22.00, sgpsirsE22.b1, sgpsirs20sE22.a0
Description:	The suntracker was driven past it optical limit switch and pulled the direct normal (NIP) instrument cable from its connector.
Measurements:	sgpsirs20sE22.a0: Instantaneous Direct Normal Shortwave Irradiance, Pyrheliometer Thermopile Voltage(inst_direct_normal) sgpsirsE22.b1: Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min) Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std) Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal) Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max) sgpsirsE22.00: Raw data stream - documentation not supported(Raw data stream - documentation not supported)

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DQRID : D040712.3

Start Date	Start Time	End Date	End Time
04/17/2003	1200	05/20/2003	1300
07/26/2003	1300	09/06/2003	1200
04/08/2004	1200	05/20/2004	1300
07/26/2004	1300	09/06/2004	1200

Subject:	SGP/SIRS/E24 - NIP shaded near sunrise
DataStreams:	sgpsirsE24.b1, sgpsirs20sE24.a0
Description:	The NIP is shaded by the EF laptop computer enclosure near sunrise during parts of the Spring and Summer. This has occurred from 04/08 to 05/20 and from 07/26 to 09/06 every year since 2001 and will occur during these date ranges in the future as well. The shading occurs for a few minutes each day between 1200 and 1300 GMT depending on the time of the year. For the early dates, shading occurs a little after 1200 GMT and by 05/20 shading happens nearer to 1300 GMT. In late July the shading occurs near 1300 GMT and closer to 1200 GMT by 09/06.
Measurements:	sgpsirs20sE24.a0: Instantaneous Direct Normal Shortwave Irradiance, Pyrheliometer Thermopile Voltage(inst_direct_normal) sgpsirsE24.b1: Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max) Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std) Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min) Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)

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DQRID : D040907.1

Start Date	Start Time	End Date	End Time
08/27/2004	1830	09/07/2004	2130

Subject:	SGP/SIRS/C1/E13 - Incorrect calibration coefficients
DataStreams:	sgpsirsC1.00, sgpsirsC1.b1, sgpsirsE13.00, sgpsirsE13.b1, sgpsirs20sC1.a0, sgpsirs20sE13.a0
Description:	After the DIR changeout on 8/27, the DLH measurements at the central facility vary significantly between pyrgeometers by as much as 65 Wm^(-2). It was discovered that the two downwelling pyrgeometers destined for C1 and E13 may have been swapped during installation. The instrument mentor is unsure of applied calibration coefficients during this DQR's time period. Backing out new downwelling longwave irradiances would be difficult in this case. Fortunately, the problem period is less than a fortnight.
Measurements:	sgpsirsE13.b1: Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Standard Deviation(down_long_hemisp_shaded_std) Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max) Instantaneous Downwelling Pyrgeometer Case Thermistor Temperature, Shaded Pyrgeometer(inst_down_long_shaded_case_temp) Downwelling Longwave Hemispheric Net Infrared(down_long_netir) Instantaneous Downwelling Pyrgeometer Dome Thermistor Temperature, Shaded Pyrgeometer(inst_down_long_shaded_dome_temp) Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded) Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Minima(down_long_hemisp_shaded_min) sgpsirsC1.b1: Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Standard Deviation(down_long_hemisp_shaded_std) Downwelling Longwave Hemispheric Net Infrared(down_long_netir) Instantaneous Downwelling Pyrgeometer Dome Thermistor Temperature, Shaded Pyrgeometer(inst_down_long_shaded_dome_temp) Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max) 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, Minima(down_long_hemisp_shaded_min) sgpsirsC1.00: Raw data stream - documentation not supported(Raw data stream - documentation not supported) sgpsirs20sE13.a0: Instantaneous Downwelling Pyrgeometer Thermopile Voltage, Shaded Pyrgeometer(inst_down_long_hemisp_shaded_tp) Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded Pyrgeometer(inst_down_long_shaded_case_resist) Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded Pyrgeometer(inst_down_long_shaded_dome_resist) sgpsirs20sC1.a0: Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded Pyrgeometer(inst_down_long_shaded_case_resist) 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) sgpsirsE13.00: Raw data stream - documentation not supported(Raw data stream - documentation not supported)

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DQRID : D050117.1

Start Date	Start Time	End Date	End Time
12/23/2004	2315	01/25/2005	1800

Subject:	SGP/SIRS/E9 - Unknown -failed PSP ventilator fan
DataStreams:	sgpsirsE9.00, sgpsirsE9.b1, sgpsirs20sE9.a0
Description:	Downwelling shortwave hemispheric (DSH) readings appear to have a slight to moderate negative offset from derived DSH values. At night, this negative offset causes qc flags (since values are below the minimum threshold of -10 W/m^2). Differences between derived and actual DSH values are sometimes on the order of 50 W/m^2 due to this offset. The offset was discovered to be due to a failed ventilator fan which is used to clear the dome of the PSP, the instrument which measures the DSH. The ventilator likely seized or was intermittent and heated the PSP base giving an erroneous DSH reading. Field techs replaced the fan on 01/25/2005 1745GMT. The DSH has been reading normally since that time.
Measurements:	sgpsirs20sE9.a0: Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile Voltage(inst_global) sgpsirsE9.b1: Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard Deviation(down_short_hemisp_std) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_short_hemisp_min) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max) sgpsirsE9.00: Raw data stream - documentation not supported(Raw data stream - documentation not supported)

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DQRID : D050131.22

Start Date	Start Time	End Date	End Time
01/05/2005	0602	01/11/2005	1423

Subject:	SGP/SIRS/E11 - Ice storm
DataStreams:	sgpsirsE11.b1, sgpsirs20sE11.a0
Description:	Data missing due to ice storm.
Measurements:	sgpsirsE11.b1: Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min) Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Standard Deviation(up_short_hemisp_std) Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer(up_short_hemisp) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp) Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(up_long_hemisp_max) Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(up_short_hemisp_max) Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer(up_long_hemisp) Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Standard Deviation(down_long_hemisp_shaded_std) Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(up_long_hemisp_min) Downwelling Longwave Hemispheric Net Infrared(down_long_netir) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min) Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Minima(down_long_hemisp_shaded_min) Time offset from base_time(base_time) Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal) Upwelling Longwave Hemispheric Net Infrared(up_long_netir) Instantaneous Downwelling Pyrgeometer Dome Thermistor Temperature, Shaded Pyrgeometer(inst_down_long_shaded_dome_temp) north latitude for all the input platforms.(lat) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard Deviation(down_short_hemisp_std) east longitude for all the input platforms.(lon) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_short_hemisp_min) Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp) Battery voltage(vBatt) altitude above sea levelaltunits(alt) Instantaneous Upwelling Pyrgeometer Case Thermistor Temperature, Pyrgeometer(inst_up_long_case_temp) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max) Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Standard Deviation(down_short_diffuse_hemisp_std) Instantaneous Downwelling Pyrgeometer Case Thermistor Temperature, Shaded Pyrgeometer(inst_down_long_shaded_case_temp) Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard Deviation(up_long_hemisp_std) Instantaneous Upwelling Pyrgeometer Dome Thermistor Temperature, Pyrgeometer(inst_up_long_dome_temp) Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max) Time offset of tweaks from base_time(time_offset) Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std) Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(up_short_hemisp_min) sgpsirs20sE11.a0: Instantaneous Downwelling Pyrgeometer Thermopile Voltage, Shaded Pyrgeometer(inst_down_long_hemisp_shaded_tp) 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) Time offset from base_time(base_time) Time offset of tweaks from base_time(time_offset) north latitude for all the input platforms.(lat) Instantaneous Uncorrected Downwelling Shortwave Diffuse, Shaded Pyranometer Thermopile Voltage(inst_diffuse) Instantaneous Direct Normal Shortwave Irradiance, Pyrheliometer Thermopile Voltage(inst_direct_normal) east longitude for all the input platforms.(lon) Instantaneous Upwelling Pyrgeometer Thermopile Voltage, Pyrgeometer(inst_up_long_hemisp_tp) Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded Pyrgeometer(inst_down_long_shaded_dome_resist) altitude above sea levelaltunits(alt) Instantaneous Upwelling Shortwave Irradiance, Inverted Pyranometer Thermopile Voltage(inst_up_short_hemisp) Instantaneous Upwelling Pyrgeometer Case Thermistor Resistance, Pyrgeometer(inst_up_long_case_resist)

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DQRID : D050131.28

Start Date	Start Time	End Date	End Time
01/04/2005	2102	01/11/2005	1943

Subject:	SGP/SIRS/E8 - Ice storm
DataStreams:	sgpsirsE8.b1, sgpsirs20sE8.a0
Description:	Data missing due to ice storm.
Measurements:	sgpsirs20sE8.a0: Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded Pyrgeometer(inst_down_long_shaded_dome_resist) north latitude for all the input platforms.(lat) altitude above sea levelaltunits(alt) Instantaneous Upwelling Shortwave Irradiance, Inverted Pyranometer Thermopile Voltage(inst_up_short_hemisp) Instantaneous Upwelling Pyrgeometer Thermopile Voltage, Pyrgeometer(inst_up_long_hemisp_tp) Instantaneous Upwelling Pyrgeometer Case Thermistor Resistance, Pyrgeometer(inst_up_long_case_resist) Instantaneous Downwelling Pyrgeometer Thermopile Voltage, Shaded Pyrgeometer(inst_down_long_hemisp_shaded_tp) Time offset of tweaks from base_time(time_offset) Time offset from base_time(base_time) east longitude for all the input platforms.(lon) Instantaneous Upwelling Pyrgeometer Dome Thermistor Resistance, Pyrgeometer(inst_up_long_dome_resist) Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded Pyrgeometer(inst_down_long_shaded_case_resist) Instantaneous Uncorrected Downwelling Shortwave Diffuse, Shaded Pyranometer Thermopile Voltage(inst_diffuse) Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile Voltage(inst_global) Instantaneous Direct Normal Shortwave Irradiance, Pyrheliometer Thermopile Voltage(inst_direct_normal) sgpsirsE8.b1: Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Minima(down_long_hemisp_shaded_min) Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Standard Deviation(up_short_hemisp_std) Instantaneous Upwelling Pyrgeometer Case Thermistor Temperature, Pyrgeometer(inst_up_long_case_temp) Time offset from base_time(base_time) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min) Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded) east longitude for all the input platforms.(lon) Instantaneous Upwelling Pyrgeometer Dome Thermistor Temperature, Pyrgeometer(inst_up_long_dome_temp) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp) Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(up_long_hemisp_min) Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp) Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_short_hemisp_min) Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(up_long_hemisp_max) north latitude for all the input platforms.(lat) Instantaneous Downwelling Pyrgeometer Dome Thermistor Temperature, Shaded Pyrgeometer(inst_down_long_shaded_dome_temp) Instantaneous Downwelling Pyrgeometer Case Thermistor Temperature, Shaded Pyrgeometer(inst_down_long_shaded_case_temp) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Standard Deviation(down_short_diffuse_hemisp_std) altitude above sea levelaltunits(alt) Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer(up_short_hemisp) Upwelling Longwave Hemispheric Net Infrared(up_long_netir) Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max) Battery voltage(vBatt) Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(up_short_hemisp_max) Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(up_short_hemisp_min) Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer(up_long_hemisp) Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal) Downwelling Longwave Hemispheric Net Infrared(down_long_netir) Time offset of tweaks from base_time(time_offset) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard Deviation(down_short_hemisp_std) Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Standard Deviation(down_long_hemisp_shaded_std) Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard Deviation(up_long_hemisp_std) Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)

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DQRID : D050131.29

Start Date	Start Time	End Date	End Time
01/05/2005	0702	01/09/2005	1448

Subject:	SGP/SIRS/E9 - Ice storm
DataStreams:	sgpsirsE9.b1, sgpsirs20sE9.a0
Description:	Data missing due to ice storm.
Measurements:	sgpsirs20sE9.a0: north latitude for all the input platforms.(lat) Instantaneous Upwelling Pyrgeometer Dome Thermistor Resistance, Pyrgeometer(inst_up_long_dome_resist) Time offset from base_time(base_time) Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile Voltage(inst_global) Instantaneous Direct Normal Shortwave Irradiance, Pyrheliometer Thermopile Voltage(inst_direct_normal) Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded Pyrgeometer(inst_down_long_shaded_dome_resist) Instantaneous Uncorrected Downwelling Shortwave Diffuse, Shaded Pyranometer Thermopile Voltage(inst_diffuse) altitude above sea levelaltunits(alt) Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded Pyrgeometer(inst_down_long_shaded_case_resist) Instantaneous Downwelling Pyrgeometer Thermopile Voltage, Shaded Pyrgeometer(inst_down_long_hemisp_shaded_tp) Instantaneous Upwelling Pyrgeometer Thermopile Voltage, Pyrgeometer(inst_up_long_hemisp_tp) Time offset of tweaks from base_time(time_offset) Instantaneous Upwelling Shortwave Irradiance, Inverted Pyranometer Thermopile Voltage(inst_up_short_hemisp) Instantaneous Upwelling Pyrgeometer Case Thermistor Resistance, Pyrgeometer(inst_up_long_case_resist) east longitude for all the input platforms.(lon) sgpsirsE9.b1: Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard Deviation(down_short_hemisp_std) Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Standard Deviation(down_long_hemisp_shaded_std) Instantaneous Downwelling Pyrgeometer Case Thermistor Temperature, Shaded Pyrgeometer(inst_down_long_shaded_case_temp) Time offset of tweaks from base_time(time_offset) Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Minima(down_long_hemisp_shaded_min) Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard Deviation(up_long_hemisp_std) Downwelling Longwave Hemispheric Net Infrared(down_long_netir) north latitude for all the input platforms.(lat) Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(up_long_hemisp_min) Time offset from base_time(base_time) Instantaneous Downwelling Pyrgeometer Dome Thermistor Temperature, Shaded Pyrgeometer(inst_down_long_shaded_dome_temp) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp) Instantaneous Upwelling Pyrgeometer Dome Thermistor Temperature, Pyrgeometer(inst_up_long_dome_temp) Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded) Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_short_hemisp_min) Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Standard Deviation(up_short_hemisp_std) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max) altitude above sea levelaltunits(alt) Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer(up_short_hemisp) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Standard Deviation(down_short_diffuse_hemisp_std) Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(up_short_hemisp_max) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max) Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(up_long_hemisp_max) Upwelling Longwave Hemispheric Net Infrared(up_long_netir) Instantaneous Upwelling Pyrgeometer Case Thermistor Temperature, Pyrgeometer(inst_up_long_case_temp) Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max) east longitude for all the input platforms.(lon) Battery voltage(vBatt) Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp) Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer(up_long_hemisp) Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min) Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std) Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(up_short_hemisp_min)

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DQRID : D050227.1

Start Date	Start Time	End Date	End Time
02/13/2005	1945	03/17/2005	1745

Subject:	SGP/SIRS/E24 - Erratic downwelling shortwave data
DataStreams:	sgpsirsE24.00, sgpsirsE24.b1, sgpsirs20sE24.a0
Description:	Downwelling shortwave hemispheric readings are occasionally erratic, jumping to very high or very low values for short periods of time. SGP PM techs reseated all Downwelling Shortwave PSP instrument connections on 3/17/2005 approx 1945GMT. The problem did not reoccur after that time but the DS cable was replaced on 3/31/2005 approx 1815 GMT to ensure the problem did not reappear.
Measurements:	sgpsirsE24.00: Raw data stream - documentation not supported(Raw data stream - documentation not supported) sgpsirs20sE24.a0: Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile Voltage(inst_global) sgpsirsE24.b1: Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_short_hemisp_min) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard Deviation(down_short_hemisp_std)

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DQRID : D050412.3

Start Date	Start Time	End Date	End Time
04/07/2005	0000	04/14/2005	1610

Subject:	SGP/SIRS/E24 - Dirt on dome
DataStreams:	sgpsirsE24.00, sgpsirsE24.b1, sgpsirs20sE24.a0
Description:	The Downwelling Shortwave Hemispheric (DSH) Irradiance data were erratic. The Pyranometer instrument dome at this site was likely dirty given the relatively large spread between the measured DSH and derived DSH readings during the middle part of the day (up to 50 W/m^2). Rain on 04/06 most likely contributed to this problem. Preventative maintenance on 4/14 effectively cleaned the pyranometer dome. Preventative maintenance reports indicate dry-water spots on dome when it was cleaned on 4/14.
Measurements:	sgpsirsE24.00: Raw data stream - documentation not supported(Raw data stream - documentation not supported) sgpsirs20sE24.a0: Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile Voltage(inst_global) sgpsirsE24.b1: Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_short_hemisp_min) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard Deviation(down_short_hemisp_std)

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DQRID : D050414.2

Start Date	Start Time	End Date	End Time
03/30/2005	0103	04/19/2005	1720

Subject:	SGP/SIRS/E9 - Downwelling Shortwave values low
DataStreams:	sgpsirsE9.00, sgpsirsE9.b1, sgpsirs20sE9.a0
Description:	Downwelling Shortwave Hemispheric (DSH) irradiance values from the pyranometer instrument were frequently below the MIN value of -10 W/m^2 at night. DSH values also frequently disagreed with derived readings (at times well over 50 W/m^2 difference) during the daylight hours, especially in the morning. Field techs performed maintenance but could not find obvious instrument or connection problems. The low DSH values during nighttime were on the threshold of acceptable. Largest offsets acceptable with these pyranometers is typically -10 W/m2. The large derived vs. actual DSH differences during the daylight hours are the subject of ongoing ARM investigation. No instrument problems could be identified.
Measurements:	sgpsirs20sE9.a0: Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile Voltage(inst_global) sgpsirsE9.b1: Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard Deviation(down_short_hemisp_std) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_short_hemisp_min) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max) sgpsirsE9.00: Raw data stream - documentation not supported(Raw data stream - documentation not supported)

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DQRID : D050520.1

Start Date	Start Time	End Date	End Time
05/07/2005	0000	07/20/2005	2000

Subject:	SGP/SIRS/E22 - Intermittent upwelling longwave data loss
DataStreams:	sgpsirsE22.00, sgpsirsE22.b1, sgpsirs20sE22.a0
Description:	Upwelling longwave hemispheric data drops out occasionally during the afternoon hours. Maintenance determined that the Upwelling LW Hemispheric irradiance instrument, the PIR, had a failed cable affecting only the thermopile measurement of this instrument. Cable was replaced 7/20/05 2000GMT.
Measurements:	sgpsirs20sE22.a0: Instantaneous Upwelling Pyrgeometer Dome Thermistor Resistance, Pyrgeometer(inst_up_long_dome_resist) Instantaneous Upwelling Pyrgeometer Case Thermistor Resistance, Pyrgeometer(inst_up_long_case_resist) Instantaneous Upwelling Pyrgeometer Thermopile Voltage, Pyrgeometer(inst_up_long_hemisp_tp) sgpsirsE22.b1: Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(up_long_hemisp_min) Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard Deviation(up_long_hemisp_std) Upwelling Longwave Hemispheric Net Infrared(up_long_netir) Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer(up_long_hemisp) Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(up_long_hemisp_max) sgpsirsE22.00: Raw data stream - documentation not supported(Raw data stream - documentation not supported)

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DQRID : D050621.1

Start Date	Start Time	End Date	End Time
06/13/2005	2115	06/20/2005	2200

Subject:	SGP/SIRS/E9 - Sensor cable failure
DataStreams:	sgpsirsE9.00, sgpsirsE9.b1, sgpsirs20sE9.a0
Description:	The short_direct_normal measurements from the normal incident pyrheliometer (NIP) instrument were missing beginning 6/13/2005 2115GMT. On 6/20/2005 technicians found the NIP instrument cable broken, replaced it, and returned the instrument to service at 2200GMT.
Measurements:	sgpsirs20sE9.a0: Instantaneous Direct Normal Shortwave Irradiance, Pyrheliometer Thermopile Voltage(inst_direct_normal) sgpsirsE9.b1: Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min) Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal) Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max) Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std) sgpsirsE9.00: Raw data stream - documentation not supported(Raw data stream - documentation not supported)

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DQRID : D050801.1

Start Date	Start Time	End Date	End Time
07/27/2005	1930	08/09/2005	1940

Subject:	SGP/SIRS/E8 - Downwelling Shortwave hemispheric (PSP) Dome Contamination
DataStreams:	sgpsirsE8.00, sgpsirsE8.b1, sgpsirs20sE8.a0
Description:	The downelling shortwave hemispheric instrument (Eppley PSP) dome at this site had dirt or a smudge on it. This was most noticeable during mid to late afternoon hours (around 2100 GMT). PM cleaned the dome on 8/9/05 1940, correcting the problem.
Measurements:	sgpsirsE8.00: Raw data stream - documentation not supported(Raw data stream - documentation not supported) sgpsirs20sE8.a0: Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile Voltage(inst_global) sgpsirsE8.b1: Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_short_hemisp_min) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard Deviation(down_short_hemisp_std)

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DQRID : D050929.1

Start Date	Start Time	End Date	End Time
09/27/2005	1430	09/27/2005	1630

Subject:	SGP/SIRS/C1 - sun tracker power failure
DataStreams:	sgpsirsC1.00, sgpsirsC1.b1, sgpsirs20sC1.a0
Description:	C1 experienced a sun tracker power faulure. The tracker was reset by onsite personnel shortly after the power failed. Only shaded and direct instruments were affected - i.e. the downwelling diffuse measurement from the 8-48 B&W pyranometer and the direct normal measurement from the NIP pyrheliometer. The downwelling longwave PIR data was unaffected by this event.
Measurements:	sgpsirsC1.b1: Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Standard Deviation(down_short_diffuse_hemisp_std) Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal) Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max) Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std) Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min) sgpsirsC1.00: Raw data stream - documentation not supported(Raw data stream - documentation not supported) sgpsirs20sC1.a0: Instantaneous Direct Normal Shortwave Irradiance, Pyrheliometer Thermopile Voltage(inst_direct_normal) Instantaneous Uncorrected Downwelling Shortwave Diffuse, Shaded Pyranometer Thermopile Voltage(inst_diffuse)

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DQRID : D051117.1

Start Date	Start Time	End Date	End Time
08/18/2005	1415	11/23/2005	1706

Subject:	SGP/SIRS/E24 - Reprocess: Incorrect calibration coefficients
DataStreams:	sgpsirsE24.00, sgpsirsE24.b1, sgpsirs20sE24.a0
Description:	Calibration coefficient for the downwelling diffuse measurement (8-48 B&W Eppley instrument) was incorrect after the instrument replacement 8/18/2005. Affected downwelling diffuse irradiance data can be corrected: Irr(corr) = Irr(uncorr) / 122.85 * 112.85 (or a overall multiplier of .9186)
Measurements:	sgpsirsE24.00: Raw data stream - documentation not supported(Raw data stream - documentation not supported) sgpsirs20sE24.a0: Instantaneous Uncorrected Downwelling Shortwave Diffuse, Shaded Pyranometer Thermopile Voltage(inst_diffuse) sgpsirsE24.b1: Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Standard Deviation(down_short_diffuse_hemisp_std) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)

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DQRID : D060403.1

Start Date	Start Time	End Date	End Time
10/01/2005	0000	04/04/2006	1545

Subject:	SGP/SIRS/E11 - failed ventilator fan
DataStreams:	sgpsirsE11.00, sgpsirsE11.b1, sgpsirs20sE11.a0
Description:	E11 downwelling hemispheric shortwave instrument (Eppley PSP) has shown larger and larger nighttime offsets (from -5 to -10 W/m2) since October. A failed ventilator fan was discovered during PM and replaced on 4/4/2006.
Measurements:	sgpsirsE11.b1: Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_short_hemisp_min) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard Deviation(down_short_hemisp_std) sgpsirsE11.00: Raw data stream - documentation not supported(Raw data stream - documentation not supported) sgpsirs20sE11.a0: Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile Voltage(inst_global)

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