DQRs for Session: 128385 User:sbensonCompleted: 06-12-2010

Data Quality Reports for Session: 128385 User: sbenson Completed: 06/12/2010

TABLE OF CONTENTS

DQR ID	Subject	Data Streams Affected
D080222.3	NSA/SKYRAD/C1 - IRT mirror heater failure	nsaskyrad20sC1.a0, nsaskyrad60sC1.b1
D080418.1	NSA/SKYRAD/C1 - Direct and Diffuse incorrect	nsaskyrad20sC1.a0, nsaskyrad60sC1.b1
D080630.1	NSA/SKYRAD/C1 - Tracker inoperative	nsaskyrad20sC1.a0, nsaskyrad60sC1.b1

DQRID : D080222.3

Start Date	Start Time	End Date	End Time
12/16/2007	0000	02/11/2008	1135

Subject:	NSA/SKYRAD/C1 - IRT mirror heater failure
DataStreams:	nsaskyrad20sC1.a0, nsaskyrad60sC1.b1
Description:	The heater of the IRT gold mirror failed due to a broken wire (that probably occurred on 12/13 during maintenance of the solar tracker) allowing snow and frost to accumulate on the mirror until it was cleared during daily preventative maintenance. The problem was corrected when the heater wires were replaced.
Measurements:	nsaskyrad60sC1.b1: Sky Infra Red Temperature Minima(sky_ir_temp_min) Standard Deviation of Sky Infra Red Temperature(sky_ir_temp_std) Sky Infra Red Temperature Maxima(sky_ir_temp_max) Sky Infra-Red Temperature(sky_ir_temp) nsaskyrad20sC1.a0: Instantaneous Sky/Cloud Infrared(inst_sky_ir_signal)

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DQRID : D080418.1

Start Date	Start Time	End Date	End Time
04/17/2008	0632	04/23/2008	1815

Subject:	NSA/SKYRAD/C1 - Direct and Diffuse incorrect
DataStreams:	nsaskyrad20sC1.a0, nsaskyrad60sC1.b1
Description:	The short_direct_normal (NIP) instrument and cable were damaged by tracker rewind malfunction. Tracker and NIP replaced on 4/22 2200GMT but tracker not operational until 4/23 1815GMT. Thus, down_short_diffuse_hemisp (8-48) was not shaded 4/22 to 4/23. Do not use 8-48 data from 4/22 to 4/23. NIP data is not recoverable during entire time but can be estimated using component sum for each 1 minute data: Direct = (global - diffuse)/cos(zenith angle)
Measurements:	nsaskyrad60sC1.b1: Shortwave Direct Normal Irradiance, Pyrgeometer(short_direct_normal) 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, Pyrgeometer, Standard Deviation(short_direct_normal_std) Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Standard Deviation(down_short_diffuse_hemisp_std) Shortwave Direct Normal Irradiance, Pyrgeometer, Minima(short_direct_normal_min) Shortwave Direct Normal Irradiance, Pyrgeometer, Maxima(short_direct_normal_max) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min) nsaskyrad20sC1.a0: 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 : D080630.1

Start Date	Start Time	End Date	End Time
06/27/2008	2000	06/30/2008	1740

Subject:	NSA/SKYRAD/C1 - Tracker inoperative
DataStreams:	nsaskyrad20sC1.a0, nsaskyrad60sC1.b1
Description:	Tracker stopped working at this site during the time range specified. Reason for failure is unknown. Tracker power cycled and restarted by maintenance 06/30 2008 1740 GMT. The short_direct_normal (NIP) and down_short_diffuse_hemisp (8-48) data are bad during this time. Data are not recoverable.
Measurements:	nsaskyrad60sC1.b1: 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 Hemispheric Irradiance, Pyranometer, Standard Deviation(down_short_diffuse_hemisp_std) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min) nsaskyrad20sC1.a0: 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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