DQRs for Session: 110805 User:anderbergCompleted: 03-03-2008

Data Quality Reports for Session: 110805 User: anderberg Completed: 03/03/2008

TABLE OF CONTENTS

DQR ID	Subject	Data Streams Affected
D040322.1	SGP/SIRS/C1 - Discrepancy between measured and derived downwelling shortwave hemispheric	sgpsirs20sC1.a0, sgpsirsC1.b1
D040831.1	SGP/SIRS/E1 - Reprocess: Incorrect shortwave radiometer calibration coefficients	sgpsirsE1.00, sgpsirsE1.b1
D040831.4	SGP/SIRS/E10 - Reprocess: Incorrect shortwave radiometer calibration coefficients	sgpsirsE10.00, sgpsirsE10.b1
D040831.5	SGP/SIRS/E11 - Reprocess: Incorrect shortwave radiometer calibration coefficients	sgpsirsE11.00, sgpsirsE11.b1
D040903.1	SGP/SIRS/E11 - Reprocessed: Incorrect upwelling longwave calibrations	sgpsirsE11.b1
D060630.18	SGP/SIRS/E10 - Reprocessed: Longwave Calibration error	sgpsirsE10.b1
D060630.19	SGP/SIRS/E11 - Reprocessed: Longwave Calibration error	sgpsirsE11.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
D060630.8	SGP/SIRS/C1 - Reprocessed: Longwave Calibration error	sgpsirsC1.b1
D060630.9	SGP/SIRS/E1 - Reprocessed: Longwave Calibration error	sgpsirsE1.b1

DQRID : D040322.1

Start Date	Start Time	End Date	End Time
03/18/2004	1500	06/10/2004	2000

Subject:	SGP/SIRS/C1 - Discrepancy between measured and derived downwelling shortwave hemispheric
DataStreams:	sgpsirs20sC1.a0, sgpsirsC1.b1
Description:	Measured values of downwelling hemispheric shortwave radiation were up to 40 W/m^2 higher than derived values during the afternoon hours. Analysis reveals that this is likely an artifact of the cosine response of the particular installed PSP coupled with typical uncertainties of this set of installed radiometers. That is, this particular instrument cluster seems to be producing cumulative errors on the high side of accepted values. The PSP contains the most uncertainty in measurement at this station. Users should use a derived value for the downwelling shortwave hemispheric irradiance (DS). Where DS = diffuse component + direct normal * cos(SZA) component described in the SIRS handbook Sec 7.2 available at: http://www.arm.gov/publications/tech_reports/handbooks/sirs_handbook.pdf
Measurements:	sgpsirsC1.b1: Shortwave Direct Normal Irradiance, Pyrgeometer(short_direct_normal) Shortwave Direct Normal Irradiance, Pyrgeometer, Standard Deviation(short_direct_normal_std) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Standard Deviation(down_short_hemisp_std) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, 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, Pyranometer, Standard Deviation(down_short_diffuse_hemisp_std) Down-welling unshaded pyranometer voltage(down_short_hemisp) Shortwave Direct Normal Irradiance, Pyrgeometer, Maxima(short_direct_normal_max) Shortwave Direct Normal Irradiance, Pyrgeometer, Minima(short_direct_normal_min) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp) sgpsirs20sC1.a0: Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile Voltage(inst_global) Instantaneous Uncorrected Downwelling Shortwave Diffuse, Shaded Pyranometer Thermopile Voltage(inst_diffuse) Instantaneous Direct Normal Shortwave Irradiance, Pyheliometer Thermopile Voltage(inst_direct_normal)

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DQRID : D040831.1

Start Date	Start Time	End Date	End Time
02/10/2004	2050	04/20/2004	2015

Subject:	SGP/SIRS/E1 - Reprocess: Incorrect shortwave radiometer calibration coefficients
DataStreams:	sgpsirsE1.00, sgpsirsE1.b1
Description:	During the pyrgeometer instrument (PIR) changout a datalogger program was loaded with incorrect calibration coefficients for the shortwave instruments. The affected measurements (instruments) were : downwelling diffuse (8-48), upwelling shortwave(PSP), direct normal (NIP) and downwelling shortwave (PSP) Recalculate irradiances by determining original mV signal and reapplying the correct calibration coefficients. For each one minute irradiance value perform the following calculations by instrument: DD(corrected) = (DD/107.24)109.01 US(corrected) = (US/113.19)111.47 NIP(corrected)= (NIP/120.17)114.82 DS(corrected) = (DS/118.46)116.51
Measurements:	sgpsirsE1.b1: Shortwave Direct Normal Irradiance, Pyrgeometer(short_direct_normal) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Standard Deviation(down_short_hemisp_std) Shortwave Direct Normal Irradiance, Pyrgeometer, Maxima(short_direct_normal_max) Shortwave Direct Normal Irradiance, Pyrgeometer, Minima(short_direct_normal_min) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min) Upwelling (10 meter) Shortwave Hemispheric Irradiance, Pyranometer, Minima(up_short_hemisp_min) Shortwave Direct Normal Irradiance, Pyrgeometer, Standard Deviation(short_direct_normal_std) Upwelling (10 meter) Shortwave Hemispheric Irradiance, Pyranometer, Standard Deviation(up_short_hemisp_std) Upwelling (10 meter) Shortwave Hemispheric Irradiance, Pyranometer(up_short_hemisp) Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Standard Deviation(down_short_diffuse_hemisp_std) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min) Upwelling (10 meter) Shortwave Hemispheric Irradiance, Pyranometer, Maxima(up_short_hemisp_max) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp) Down-welling unshaded pyranometer voltage(down_short_hemisp) sgpsirsE1.00: Raw data stream - documentation not supported(Raw data stream - documentation not supported)

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DQRID : D040831.4

Start Date	Start Time	End Date	End Time
02/20/2004	1630	04/21/2004	1425

Subject:	SGP/SIRS/E10 - Reprocess: Incorrect shortwave radiometer calibration coefficients
DataStreams:	sgpsirsE10.00, sgpsirsE10.b1
Description:	During the pyrgeometer instrument (PIR) changeout a datalogger program was loaded with incorrect calibration coefficients for the shortwave instruments. The affected measurements (instruments) were: downwelling diffuse (8-48), upwelling shortwave (PSP), direct normal (NIP) and downwelling shortwave (PSP) Recalculate irradiances by determining original mV signal and reapplying the correct calibration coefficients. For SGP/SIRS/E10 and each one minute irradiance value perform the following calculations by instrument: DD(corrected) = (DD/107.24)114.63 US(corrected) = (US/113.19)117.46 NIP(corrected)= (NIP/120.17)119.26 DS(corrected) = (DS/118.46)122.78
Measurements:	sgpsirsE10.b1: Shortwave Direct Normal Irradiance, Pyrgeometer, Maxima(short_direct_normal_max) Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Standard Deviation(down_short_diffuse_hemisp_std) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp) Upwelling (10 meter) Shortwave Hemispheric Irradiance, Pyranometer, Standard Deviation(up_short_hemisp_std) Upwelling (10 meter) Shortwave Hemispheric Irradiance, Pyranometer, Maxima(up_short_hemisp_max) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max) Upwelling (10 meter) Shortwave Hemispheric Irradiance, Pyranometer(up_short_hemisp) Shortwave Direct Normal Irradiance, Pyrgeometer, Minima(short_direct_normal_min) Down-welling unshaded pyranometer voltage(down_short_hemisp) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Standard Deviation(down_short_hemisp_std) Shortwave Direct Normal Irradiance, Pyrgeometer, Standard Deviation(short_direct_normal_std) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min) Shortwave Direct Normal Irradiance, Pyrgeometer(short_direct_normal) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min) Upwelling (10 meter) Shortwave Hemispheric Irradiance, Pyranometer, Minima(up_short_hemisp_min) sgpsirsE10.00: Raw data stream - documentation not supported(Raw data stream - documentation not supported)

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DQRID : D040831.5

Start Date	Start Time	End Date	End Time
02/17/2004	1741	05/05/2004	0000

Subject:	SGP/SIRS/E11 - Reprocess: Incorrect shortwave radiometer calibration coefficients
DataStreams:	sgpsirsE11.00, sgpsirsE11.b1
Description:	During the pyrgeometer instrument (PIR) changeout a datalogger program was loaded with incorrect calibration coefficients for the shortwave instruments. The affected measurements (instruments) were: downwelling diffuse (8-48), upwelling shortwave (PSP), direct normal (NIP) and downwelling shortwave (PSP) Field tech reports the datalogger program was corrected on 4/27/04. Archive data review shows this was not the case and the corrected datalogger program was uploaded sometime late day 5/4/04. The end date for this DQR was chosen to be 5/5/04 0000 the first full day of the correct datalogger program. Recalculate irradiances by determining original mV signal and reapplying the correct calibration coefficients. For each one minute irradiance value perform the following calculations by instrument: DD(corrected) = (DD/107.24)123.27 US(corrected) = (US/113.19)127.75 NIP(corrected)= (NIP/120.17)126.69 DS(corrected) = (DS/118.46)126.56
Measurements:	sgpsirsE11.b1: Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min) Shortwave Direct Normal Irradiance, Pyrgeometer, Minima(short_direct_normal_min) Upwelling (10 meter) Shortwave Hemispheric Irradiance, Pyranometer, Standard Deviation(up_short_hemisp_std) Shortwave Direct Normal Irradiance, Pyrgeometer, Maxima(short_direct_normal_max) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min) Upwelling (10 meter) Shortwave Hemispheric Irradiance, Pyranometer(up_short_hemisp) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max) Down-welling unshaded pyranometer voltage(down_short_hemisp) Shortwave Direct Normal Irradiance, Pyrgeometer, Standard Deviation(short_direct_normal_std) Shortwave Direct Normal Irradiance, Pyrgeometer(short_direct_normal) Upwelling (10 meter) Shortwave Hemispheric Irradiance, Pyranometer, Minima(up_short_hemisp_min) Upwelling (10 meter) Shortwave Hemispheric Irradiance, Pyranometer, Maxima(up_short_hemisp_max) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max) Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Standard Deviation(down_short_diffuse_hemisp_std) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Standard Deviation(down_short_hemisp_std) sgpsirsE11.00: Raw data stream - documentation not supported(Raw data stream - documentation not supported)

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DQRID : D040903.1

Start Date	Start Time	End Date	End Time
05/04/2004	0000	06/22/2004	1855

Subject:	SGP/SIRS/E11 - Reprocessed: Incorrect upwelling longwave calibrations
DataStreams:	sgpsirsE11.b1
Description:	Incorrect calibration coefficients were applied to the upwelling longwave measurements due to an error in the instrument configuration file. The data have been reprocessed to apply corrected calibrations. The reprocessed data were archived in August 2006.
Measurements:	sgpsirsE11.b1: Upwelling Longwave Hemispheric Net Infrared(up_long_netir) Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer, Maxima(up_long_hemisp_max) Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer, Minima(up_long_hemisp_min) Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer(up_long_hemisp) Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer, Standard Deviation(up_long_hemisp_std)

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DQRID : D060630.18

Start Date	Start Time	End Date	End Time
02/20/2004	1730	02/07/2006	2130

Subject:	SGP/SIRS/E10 - Reprocessed: Longwave Calibration error
DataStreams:	sgpsirsE10.b1
Description:	Modified pyrgeometer calibration procedures were implemented beginning in February 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 August 2006.
Measurements:	sgpsirsE10.b1: Upwelling Longwave Hemispheric Net Infrared(up_long_netir) Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer(up_long_hemisp) Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded) Downwelling Longwave Hemispheric Net Infrared(down_long_netir)

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DQRID : D060630.19

Start Date	Start Time	End Date	End Time
02/17/2004	1753	02/14/2006	2016

Subject:	SGP/SIRS/E11 - Reprocessed: Longwave Calibration error
DataStreams:	sgpsirsE11.b1
Description:	Modified pyrgeometer calibration procedures were implemented beginning in February 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 August 2006.
Measurements:	sgpsirsE11.b1: Upwelling Longwave Hemispheric Net Infrared(up_long_netir) Downwelling Longwave Hemispheric Net Infrared(down_long_netir) Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer(up_long_hemisp) Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded)

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DQRID : D060630.20

Start Date	Start Time	End Date	End Time
07/22/2003	1640	02/14/2006	1710

Subject:	SGP/SIRS/E12 - Reprocessed: Longwave Calibration error
DataStreams:	sgpsirsE12.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:	sgpsirsE12.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, Pyrgeometer(up_long_hemisp)

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DQRID : D060630.21

Start Date	Start Time	End Date	End Time
12/11/2003	1935	02/16/2006	1905

Subject:	SGP/SIRS/E13 - Reprocessed: Longwave Calibration error
DataStreams:	sgpsirsE13.b1
Description:	Modified pyrgeometer calibration procedures were implemented beginning in December 2003. These modified procedures introduced a calibration bias in the longwave data. The previous procedures were re-implemented at all sites between December 2005 and February 2006 to restore proper calibrations. The data collected while the incorrect procedures were in place 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:	sgpsirsE13.b1: Upwelling Longwave Hemispheric Net Infrared(up_long_netir) Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded) Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer(up_long_hemisp) Downwelling Longwave Hemispheric Net Infrared(down_long_netir)

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DQRID : D060630.22

Start Date	Start Time	End Date	End Time
07/22/2003	1650	02/14/2006	1806

Subject:	SGP/SIRS/E15 - Reprocessed: Longwave Calibration error
DataStreams:	sgpsirsE15.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:	sgpsirsE15.b1: Upwelling Longwave Hemispheric Net Infrared(up_long_netir) Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded) Downwelling Longwave Hemispheric Net Infrared(down_long_netir) Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer(up_long_hemisp)

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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, Pyrgeometer(up_long_hemisp) Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded)

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DQRID : D060630.24

Start Date	Start Time	End Date	End Time
07/22/2003	2200	02/14/2006	2100

Subject:	SGP/SIRS/E18 - Reprocessed: Longwave Calibration error
DataStreams:	sgpsirsE18.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:	sgpsirsE18.b1: Upwelling Longwave Hemispheric Net Infrared(up_long_netir) Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded) Downwelling Longwave Hemispheric Net Infrared(down_long_netir) Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer(up_long_hemisp)

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DQRID : D060630.25

Start Date	Start Time	End Date	End Time
07/24/2003	1600	02/16/2006	1558

Subject:	SGP/SIRS/E19 - Reprocessed: Longwave Calibration error
DataStreams:	sgpsirsE19.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:	sgpsirsE19.b1: Upwelling Longwave Hemispheric Net Infrared(up_long_netir) Upwelling (10 meter) Longwave Hemispheric Irradiance, 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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DQRID : D060630.8

Start Date	Start Time	End Date	End Time
12/11/2003	1950	02/16/2006	1901

Subject:	SGP/SIRS/C1 - Reprocessed: Longwave Calibration error
DataStreams:	sgpsirsC1.b1
Description:	Modified pyrgeometer calibration procedures were implemented beginning in December 2003. These modified procedures introduced a calibration bias in the longwave data. The previous procedures were re-implemented at all sites between December 2005 and February 2006 to restore proper calibrations. The data collected while the incorrect procedures were in place 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:	sgpsirsC1.b1: Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded) Downwelling Longwave Hemispheric Net Infrared(down_long_netir) Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer(up_long_hemisp) Upwelling Longwave Hemispheric Net Infrared(up_long_netir)

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DQRID : D060630.9

Start Date	Start Time	End Date	End Time
02/10/2004	2055	02/21/2006	2007

Subject:	SGP/SIRS/E1 - Reprocessed: Longwave Calibration error
DataStreams:	sgpsirsE1.b1
Description:	Modified pyrgeometer calibration procedures were implemented beginning in February 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:	sgpsirsE1.b1: Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer(up_long_hemisp) Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded) Upwelling Longwave Hemispheric Net Infrared(up_long_netir) Downwelling Longwave Hemispheric Net Infrared(down_long_netir)

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