DQRs for Session: 104404 User:motoyoitohCompleted: 02-20-2007

Data Quality Reports for Session: 104404 User: motoyoitoh Completed: 02/20/2007

TABLE OF CONTENTS

DQR ID	Subject	Data Streams Affected
D021213.2	NSA/SKYRAD/C1 - NIP shaded by skyrad stand around local midnight	nsaskyrad60sC1.a1, nsaskyrad60sC1.b1
D021213.4	NSA/SKYRAD/C1 - PSP shaded by MFRSR after local midnight	nsaskyrad60sC1.a1, nsaskyrad60sC1.b1
D030510.2	NSA/SKYRAD/C1 - IRT measurements during precipitation events	nsaskyrad60sC1.a1
D990924.2	NSA/SKYRAD/C1 - IRT insufficiently heated	nsaskyrad60sC1.a1

DQRID : D021213.2

Start Date	Start Time	End Date	End Time
05/01/1999	0000	08/10/1999	0000
05/01/2000	0000	08/10/2000	0000
05/01/2001	0000	08/10/2001	0000
05/01/2002	0000	08/10/2002	0000

Subject:	NSA/SKYRAD/C1 - NIP shaded by skyrad stand around local midnight
DataStreams:	nsaskyrad60sC1.a1, nsaskyrad60sC1.b1
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) nsaskyrad60sC1.b1: NIP maximum(nip_max) NIP standard deviation(nip_sd) NIP minimum(nip_min) NIP mean(nip_mean)

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DQRID : D021213.4

Start Date	Start Time	End Date	End Time
05/01/1999	0000	08/10/1999	0000
05/01/2000	0000	08/10/2000	0000
05/01/2001	0000	08/10/2001	0000
05/01/2002	0000	08/10/2002	0000

Subject:	NSA/SKYRAD/C1 - PSP shaded by MFRSR after local midnight
DataStreams:	nsaskyrad60sC1.a1, nsaskyrad60sC1.b1
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) nsaskyrad60sC1.b1: PSP1 unshaded maximum(psp1_max) PSP1 unshaded standard deviation(psp1_sd) PSP1 unshaded mean(psp1_mean) PSP1 unshaded minimum(psp1_min)

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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/Cloud Infra-Red Temperature(sky_ir_temp) Sky/Cloud Infra-Red Temperature Standard Deviation(sky_ir_temp_std) Sky/Cloud Infra-Red Temperature Maxima(sky_ir_temp_max) Sky/Cloud Infra-Red Temperature Minima(sky_ir_temp_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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