DQRs for Session: 140011 User:sbiraudCompleted: 01-24-2012

Data Quality Reports for Session: 140011 User: sbiraud Completed: 01/24/2012

TABLE OF CONTENTS

DQR ID	Subject	Data Streams Affected
D110613.1	SGP/SIRS/E16 - Downwelling global SW incorrect	sgpsirsE16.b1, sgpsirs20sE16.a0
D110725.2	SGP/SIRS/E13 - NIP damaged by lightning strike	sgpsirsE13.b1, sgpsirs20sE13.a0
D111115.3	SGP/SIRS/E13 - Intermittent upwelling longwave	sgpsirsE13.b1, sgpsirs20sE13.a0

DQRID : D110613.1

Start Date	Start Time	End Date	End Time
02/05/2011	1532	03/07/2011	1855

Subject:	SGP/SIRS/E16 - Downwelling global SW incorrect
DataStreams:	sgpsirsE16.b1, sgpsirs20sE16.a0
Description:	The down_short_hemisp (PSP instrument) values exhibit a large offset due to ventilator fan failure and induced instrument heating. This offset cannot be corrected. Users can derive an estimate of global shortwave values with the following formula: global = direct * cos(zenith angle) + diffuse
Measurements:	sgpsirsE16.b1: down_short_hemisp_std Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max) Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp) sgpsirs20sE16.a0: inst_global

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DQRID : D110725.2

Start Date	Start Time	End Date	End Time
06/12/2011	0539	06/14/2011	1556

Subject:	SGP/SIRS/E13 - NIP damaged by lightning strike
DataStreams:	sgpsirsE13.b1, sgpsirs20sE13.a0
Description:	Apparent lightning strike in the instrument cluster area resulted in a failed NIP. The SIRS was due for calibration change outs so the US, DS, DD and NIP were replaced. The updated program was loaded at approximately 1730 GMT. An estimate of direct normal values can be derived using the following formula: short_direct_normal = (down_short_hemisp - down_short_diffuse_hemisp)/cos(zenith angle)
Measurements:	sgpsirs20sE13.a0: inst_direct_normal sgpsirsE13.b1: Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal) short_direct_normal_std Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min) Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)

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DQRID : D111115.3

Start Date	Start Time	End Date	End Time
09/19/2011	1512	10/27/2011	1559

Subject:	SGP/SIRS/E13 - Intermittent upwelling longwave
DataStreams:	sgpsirsE13.b1, sgpsirs20sE13.a0
Description:	Beginning 9/19/2011 @ 15:12, the upwelling longwave values are often spiking to large and small values throughout the day. A multiplexer was found to be the problem and the ops replaced it on 10/27/2011. Incorrect data are not recoverable for the specified time range. However, good data exists within the time range. The SGPQCRAD VAP data stream provides flags for "good" data and appears to accurately flag bad data during this time range. Users are advised to use this data stream to screen for correct up_long_hemisp values.
Measurements:	sgpsirs20sE13.a0: inst_up_long_case_resist inst_up_long_hemisp_tp inst_up_long_dome_resist sgpsirsE13.b1: up_long_hemisp_std inst_up_long_case_temp Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min) Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp) inst_up_long_dome_temp Upwelling Longwave Hemispheric Net Infrared(up_long_netir) Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Maxima(up_long_hemisp_max)

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