DQRs for Session: 113072 User:julia1flahCompleted: 07-09-2008

Data Quality Reports for Session: 113072 User: julia1flah Completed: 07/09/2008

TABLE OF CONTENTS

DQR ID	Subject	Data Streams Affected
D021213.1	NSA/SKYRAD/C1 - NIP shaded by skyrad stand around local midnight	nsaskyrad60sC1.a1
D021213.3	NSA/SKYRAD/C1 - PSP shaded by MFRSR after local midnight	nsaskyrad60sC1.a1
D030510.2	NSA/SKYRAD/C1 - IRT measurements during precipitation events	nsaskyrad60sC1.a1
D990108.2	NSA/SKYRAD/C1 - IRT removed for repair	nsaskyrad60sC1.a1, nsaskyradC1.00
D990924.1	NSA/GNDRAD/C1 - IRT insufficiently heated	nsagndrad60sC1.a1
D990924.2	NSA/SKYRAD/C1 - IRT insufficiently heated	nsaskyrad60sC1.a1

DQRID : D021213.1

Start Date	Start Time	End Date	End Time
05/01/1998	0000	08/10/1998	0000

Subject:	NSA/SKYRAD/C1 - NIP shaded by skyrad stand around local midnight
DataStreams:	nsaskyrad60sC1.a1
Description:	Around local midnight 9:30-10:30 GMT during summer clear sky the normal incidence pyranometer is shaded by the instrument stand.This causes the reading to be 0 W/m2. If cosine correction is applied for irradiance calulations this effect is negligible due to the low solar angle.
Measurements:	nsaskyrad60sC1.a1: NIP maximum(nip_max) NIP standard deviation(nip_sd) NIP minimum(nip_min) NIP mean(nip_mean)

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DQRID : D021213.3

Start Date	Start Time	End Date	End Time
05/01/1998	0000	08/10/1998	0000

Subject:	NSA/SKYRAD/C1 - PSP shaded by MFRSR after local midnight
DataStreams:	nsaskyrad60sC1.a1
Description:	Just past local midnight (11:00-11:40 GMT during summer clear sky) the global hemispherical pyranometer is shaded by the MFRSR instrument for about 40 minutes. This causes the reading to be 0 W/m2. This effect would be negligible in a daily average due to the low solar angle.
Measurements:	nsaskyrad60sC1.a1: PSP1 unshaded mean(psp1_mean) PSP1 unshaded minimum(psp1_min) PSP1 unshaded maximum(psp1_max) PSP1 unshaded standard deviation(psp1_sd)

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DQRID : D030510.2

Start Date	Start Time	End Date	End Time
02/14/1998	2330	03/03/2003	2359

Subject:	NSA/SKYRAD/C1 - IRT measurements during precipitation events
DataStreams:	nsaskyrad60sC1.a1
Description:	The IRT measurement of sky/cloud temperature was in question during precipitation events because rain or snow could accumulate in the upward-pointed lens barrel. This was corrected by reorienting the IRT to measure the sky temperature as reflected by a gold mirror.
Measurements:	nsaskyrad60sC1.a1: Sky Infra-Red Temperature(sky_ir_temp) Standard Deviation of Sky Infra Red Temperature(sky_ir_temp_std) Sky Infra Red Temperature Maxima(sky_ir_temp_max) Sky Infra Red Temperature Minima(sky_ir_temp_min)

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DQRID : D990108.2

Start Date	Start Time	End Date	End Time
03/16/1998	1900	10/28/1998	1300

Subject:	NSA/SKYRAD/C1 - IRT removed for repair
DataStreams:	nsaskyrad60sC1.a1, nsaskyradC1.00
Description:	The instrument was damaged by internal water condensation caused by the exterior foam insulation used to keep the IRT above freezing. It was returned in July 1998 to the manufacturer for repair.
Measurements:	nsaskyrad60sC1.a1: IRT1 maximum(irt1_max) IRT1 standard deviation(irt1_sd) IRT1 minimum(irt1_min) IRT1 mean(irt1_mean) nsaskyradC1.00: null(Raw data stream - documentation not supported)

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DQRID : D990924.1

Start Date	Start Time	End Date	End Time
04/06/1998	2156	12/22/2000	2020

Subject:	NSA/GNDRAD/C1 - IRT insufficiently heated
DataStreams:	nsagndrad60sC1.a1
Description:	IRT had insufficient heating to maintain an internal reference temperature above 0 degrees C. Measurements of sky temperature were over-estimated when instrument was below freezing.
Measurements:	nsagndrad60sC1.a1: IRT1 standard deviation(irt1_sd) IRT1 mean(irt1_mean) IRT1 maximum(irt1_max) IRT1 minimum(irt1_min)

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DQRID : D990924.2

Start Date	Start Time	End Date	End Time
02/14/1998	0130	12/21/2000	1925

Subject:	NSA/SKYRAD/C1 - IRT insufficiently heated
DataStreams:	nsaskyrad60sC1.a1
Description:	IRT had insufficient heating to maintain an internal reference temperature above 0 degrees C. Measurements of sky temperature were over-estimated when instrument was below freezing.
Measurements:	nsaskyrad60sC1.a1: IRT1 maximum(irt1_max) IRT1 standard deviation(irt1_sd) IRT1 minimum(irt1_min) IRT1 mean(irt1_mean)

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