DQRs for Session: 105885 User:bartformanCompleted: 05-31-2007

Data Quality Reports for Session: 105885 User: bartforman Completed: 05/31/2007

TABLE OF CONTENTS

DQR ID	Subject	Data Streams Affected
D030527.2	SGP/SIRS/E27 - Instrument problem, Shadowband Misalignment	sgpsirsE27.00, sgpsirsE27.b1, sgpsirs20sE27.a0
D030715.2	SGP/SIRS/E5 - Downwelling direct normal (NIP) reporting low	sgpsirsE5.00, sgpsirsE5.b1, sgpsirs20sE5.a0
D040712.2	SGP/SIRS/E24 - NIP shaded near sunrise	sgpsirsE24.a2, sgpsirsE24.b1, sgpsirs20sE24.a0, sgpsirs60sE24.a1
D040712.3	SGP/SIRS/E24 - NIP shaded near sunrise	sgpsirsE24.b1, sgpsirs20sE24.a0
D060630.23	SGP/SIRS/E16 - Reprocessed: Longwave Calibration error	sgpsirsE16.b1
D060630.29	SGP/SIRS/E24 - Reprocessed: Longwave Calibration error	sgpsirsE24.b1
D060630.30	SGP/SIRS/E27 - Reprocessed: Longwave Calibration error	sgpsirsE27.b1

DQRID : D030527.2

Start Date	Start Time	End Date	End Time
05/16/2003	0000	06/18/2003	1845

Subject:	SGP/SIRS/E27 - Instrument problem, Shadowband Misalignment
DataStreams:	sgpsirsE27.00, sgpsirsE27.b1, sgpsirs20sE27.a0
Description:	Downwelling and Upwelling longwave values are somewhat noisy due to noisy PIR (pygeometer) case and dome thermistor measurements on both the upwelling and downwelling PIRs. This problem dates back to the beginning of the SIRS E27 data stream.
Measurements:	sgpsirsE27.00: Raw data stream - documentation not supported(Raw data stream - documentation not supported) sgpsirsE27.b1: Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(up_long_hemisp_max) Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer(up_long_hemisp) Instantaneous Upwelling Pyrgeometer Case Thermistor Temperature, Pyrgeometer(inst_up_long_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) Instantaneous Upwelling Pyrgeometer Dome Thermistor Temperature, Pyrgeometer(inst_up_long_dome_temp) Instantaneous Downwelling Pyrgeometer Case Thermistor Temperature, Shaded Pyrgeometer(inst_down_long_shaded_case_temp) Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded) Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard Deviation(up_long_hemisp_std) Instantaneous Downwelling Pyrgeometer Dome Thermistor Temperature, Shaded Pyrgeometer(inst_down_long_shaded_dome_temp) Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(up_long_hemisp_min) Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Minima(down_long_hemisp_shaded_min) sgpsirs20sE27.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 Upwelling Pyrgeometer Case Thermistor Resistance, Pyrgeometer(inst_up_long_case_resist) Instantaneous Upwelling Pyrgeometer Dome Thermistor Resistance, Pyrgeometer(inst_up_long_dome_resist)

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DQRID : D030715.2

Start Date	Start Time	End Date	End Time
07/11/2003	1630	07/16/2003	1840

Subject:	SGP/SIRS/E5 - Downwelling direct normal (NIP) reporting low
DataStreams:	sgpsirsE5.00, sgpsirsE5.b1, sgpsirs20sE5.a0
Description:	There were large differences between the measured downwelling shortwave (DS) and the downwelling shortwave calculated from direct (NIP) and diffuse (DD) readings. It appears that the direct normal shortwave readings were much too low, particularly on 7/14 and 7/15. It appears that the diffuse instrument was being shaded properly, but the NIP was not tracking the sun. The problem was corrected during the preventative maintenance visit on 7/16/03 at 1840GMT. The technician reported doing the quarterly connection corrosion checks and ventilator fan cleaning, the NIP was described as having "dry-light dust" on the window, no mention of tracker alignment was made. Although uncertain, a bad connection at some point in the instrument wiring was likely to blame and was eliminated during the corrosion inspection process.
Measurements:	sgpsirsE5.b1: Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal) Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min) Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max) Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std) sgpsirs20sE5.a0: Instantaneous Direct Normal Shortwave Irradiance, Pyrheliometer Thermopile Voltage(inst_direct_normal) sgpsirsE5.00: Raw data stream - documentation not supported(Raw data stream - documentation not supported)

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DQRID : D040712.2

Start Date	Start Time	End Date	End Time
04/08/2002	1200	05/20/2002	1300
07/26/2002	1300	09/06/2002	1200
04/08/2003	1200	04/16/2003	1300

Subject:	SGP/SIRS/E24 - NIP shaded near sunrise
DataStreams:	sgpsirsE24.a2, sgpsirsE24.b1, sgpsirs20sE24.a0, sgpsirs60sE24.a1
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) sgpsirs60sE24.a1: Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std) Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max) Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal) Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min) sgpsirsE24.b1: Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max) Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal) Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std) Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min) sgpsirsE24.a2: Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std) Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max) Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal) Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)

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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 : D060630.23

Start Date	Start Time	End Date	End Time
07/23/2003	1605	02/15/2006	1533

Subject:	SGP/SIRS/E16 - Reprocessed: Longwave Calibration error
DataStreams:	sgpsirsE16.b1
Description:	Modified pyrgeometer calibration procedures were implemented beginning in July 2003. These modified procedures introduced a calibration bias in the longwave data. The previous procedures were re-implemented at all sites between December 2005 and February 2006 to restore proper calibrations. The data collected while the incorrect procedures were in place have been reprocessed to remove the calibration bias. The reprocessed 60 second averaged data are based on 3 instantaneous 20 second data records rather than on 60 1 second instantaneous data records. Still, these data are considered far superior to the originally processed data. The reprocessed data were archived in October 2006.
Measurements:	sgpsirsE16.b1: Upwelling Longwave Hemispheric Net Infrared(up_long_netir) Downwelling Longwave Hemispheric Net Infrared(down_long_netir) Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer(up_long_hemisp) Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded)

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DQRID : D060630.29

Start Date	Start Time	End Date	End Time
07/24/2003	1640	02/16/2006	1705

Subject:	SGP/SIRS/E24 - Reprocessed: Longwave Calibration error
DataStreams:	sgpsirsE24.b1
Description:	Modified pyrgeometer calibration procedures were implemented beginning in July 2004. These modified procedures introduced a calibration bias in the longwave data. The previous procedures were re-implemented at all sites between December 2005 and February 2006 to restore proper calibrations. The data collected while the incorrect procedures were in place have been reprocessed to remove the calibration bias. The reprocessed 60 second averaged data are based on 3 instantaneous 20 second data records rather than on 60 1 second instantaneous data records. Still, these data are considered far superior to the originally processed data. The reprocessed data were archived in October 2006.
Measurements:	sgpsirsE24.b1: Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded) Downwelling Longwave Hemispheric Net Infrared(down_long_netir) Upwelling Longwave Hemispheric Net Infrared(up_long_netir) Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer(up_long_hemisp)

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DQRID : D060630.30

Start Date	Start Time	End Date	End Time
05/16/2003	0002	02/15/2006	1750

Subject:	SGP/SIRS/E27 - Reprocessed: Longwave Calibration error
DataStreams:	sgpsirsE27.b1
Description:	Modified pyrgeometer calibration procedures were implemented beginning in May 2003. These modified procedures introduced a calibration bias in the longwave data. The previous procedures were re-implemented at all sites between December 2005 and February 2006 to restore proper calibrations. The data collected while the incorrect procedures were in place have been reprocessed to remove the calibration bias. The reprocessed 60 second averaged data are based on 3 instantaneous 20 second data records rather than on 60 1 second instantaneous data records. Still, these data are considered far superior to the originally processed data. The reprocessed data were archived in October 2006.
Measurements:	sgpsirsE27.b1: Upwelling Longwave Hemispheric Net Infrared(up_long_netir) Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer(up_long_hemisp) Downwelling Longwave Hemispheric Net Infrared(down_long_netir) Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded)

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