DQRs for Session: 119585 User:cpetrichCompleted: 05-14-2009

Data Quality Reports for Session: 119585 User: cpetrich Completed: 05/14/2009

TABLE OF CONTENTS

DQR ID	Subject	Data Streams Affected
D020814.9	NSA/SKYRAD/C1 - Reprocess: PIR identified as unshaded is really shaded	nsaskyrad60sC1.b1
D030819.2	NSA/SKYRAD/C1 - IRT failed	nsaskyrad60sC1.a1, nsaskyrad60sC1.b1
D030820.1	NSA/SKYRAD/C1 - IRT incorrectly configured	nsaskyrad60sC1.a1, nsaskyrad60sC1.b1
D030821.2	NSA/SKYRAD/C1 - IRT incorrect min/max value	nsaskyrad60sC1.b1
D031007.2	NSA/SKYRAD/C1 - IRT measurements during precipitation events	nsaskyrad60sC1.b1
D040213.4	NSA/SKYRAD/C1 - Downwelling IRT bias	nsaskyrad60sC1.b1
D040421.2	NSA/SKYRAD/C1 - Tracker Inoperative	nsaskyrad60sC1.b1
D040421.3	NSA/SKYRAD/C1 - itermittant IRT bias	nsaskyrad60sC1.b1
D051101.2	NSA/SKYRAD/C1 - IRT failure	nsaskyrad60sC1.b1
D060209.5	NSA/SKYRAD/C1 - Power outage affecting some SKYRAD instruments	nsaskyrad20sC1.a0, nsaskyrad60sC1.b1, nsaskyradC1.00
D071018.1	NSA/SKYRAD/C1 - Missing data	nsaskyrad60sC1.b1
D071025.1	NSA/SKYRAD/C1 - Reprocessed: Incorrect calibration coefficient	nsaskyrad20sC1.a0, nsaskyrad60sC1.b1
D080107.2	NSA/SKYRAD/C1 - Instrument cleaning effects	nsaskyrad20sC1.a0, nsaskyrad60sC1.b1
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
D090209.4	NSA/SKYRAD/C1 - Reprocess: IRT insufficiently heated	nsaskyrad60sC1.b1

DQRID : D020814.9

Start Date	Start Time	End Date	End Time
05/15/2002	1905	06/24/2002	2359

Subject:	NSA/SKYRAD/C1 - Reprocess: PIR identified as unshaded is really shaded
DataStreams:	nsaskyrad60sC1.b1
Description:	On 5/15/02 the Global PIR was moved from the unshaded position on the Skyrad stand to a shaded spot on the tracker. It is still using the same Logger channel as it did as an unshaded PIR even though it is now shaded.
Measurements:	nsaskyrad60sC1.b1: Downwelling Longwave Hemispheric Irradiance, Pyrgeometer2, Minima(down_long_hemisp2_min) Downwelling Longwave Hemispheric Irradiance, Pyrgeometer2(down_long_hemisp2) Instantaneous Downwelling Pyrgeometer Thermopile, Pyrgeometer2(inst_down_long_hemisp2_tp) Downwelling Longwave Hemispheric Irradiance, Pyrgeometer2, Standard Deviation(down_long_hemisp2_std) Instantaneous Downwelling Pyrgeometer Case Thermistor Temperature, Pyrgeometer2(inst_down_long_hemisp2_case_temp) Downwelling Longwave Hemispheric Irradiance, Pyrgeometer2, Maxima(down_long_hemisp2_max) Instantaneous Downwelling Pyrgeometer Dome Thermistor Temperature, Pyrgeometer2(inst_down_long_hemisp2_dome_temp)

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DQRID : D030819.2

Start Date	Start Time	End Date	End Time
04/05/2002	2330	06/27/2002	1920

Subject:	NSA/SKYRAD/C1 - IRT failed
DataStreams:	nsaskyrad60sC1.a1, nsaskyrad60sC1.b1
Description:
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) nsaskyrad60sC1.b1: Sky Infra Red Temperature Minima(sky_ir_temp_min) Sky Infra Red Temperature Maxima(sky_ir_temp_max) Standard Deviation of Sky Infra Red Temperature(sky_ir_temp_std) Sky Infra-Red Temperature(sky_ir_temp)

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DQRID : D030820.1

Start Date	Start Time	End Date	End Time
06/27/2002	1920	07/10/2002	1900

Subject:	NSA/SKYRAD/C1 - IRT incorrectly configured
DataStreams:	nsaskyrad60sC1.a1, nsaskyrad60sC1.b1
Description:	The IRT was removed for repair and replaced with a spare that was not configured properly. Data are incorrect.
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) nsaskyrad60sC1.b1: Sky Infra Red Temperature Minima(sky_ir_temp_min) Sky Infra Red Temperature Maxima(sky_ir_temp_max) Standard Deviation of Sky Infra Red Temperature(sky_ir_temp_std) Sky Infra-Red Temperature(sky_ir_temp)

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DQRID : D030821.2

Start Date	Start Time	End Date	End Time
04/01/2001	0000	03/03/2003	2359

Subject:	NSA/SKYRAD/C1 - IRT incorrect min/max value
DataStreams:	nsaskyrad60sC1.b1
Description:	The values of valid_min and valid_max for field sky_ir_temp were incorrectly assigned to -49.7 and +50.0 C, respectively. The actual values should be -60 and +40 C.
Measurements:	nsaskyrad60sC1.b1: Sky Infra Red Temperature Minima(sky_ir_temp_min) Sky Infra Red Temperature Maxima(sky_ir_temp_max) Sky Infra-Red Temperature(sky_ir_temp)

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DQRID : D031007.2

Start Date	Start Time	End Date	End Time
04/01/1999	0000	03/28/2003	0200

Subject:	NSA/SKYRAD/C1 - IRT measurements during precipitation events
DataStreams:	nsaskyrad60sC1.b1
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.b1: Sky Infra Red Temperature Minima(sky_ir_temp_min) Sky Infra Red Temperature Maxima(sky_ir_temp_max) Standard Deviation of Sky Infra Red Temperature(sky_ir_temp_std) Sky Infra-Red Temperature(sky_ir_temp)

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DQRID : D040213.4

Start Date	Start Time	End Date	End Time
12/11/2003	1200	01/09/2004	2120

Subject:	NSA/SKYRAD/C1 - Downwelling IRT bias
DataStreams:	nsaskyrad60sC1.b1
Description:	The downwelling IRT was measuring higher sky/cloud temperatures than the AERI. The problem was corrected when the mirror was replaced.
Measurements:	nsaskyrad60sC1.b1: Sky Infra Red Temperature Minima(sky_ir_temp_min) Sky Infra Red Temperature Maxima(sky_ir_temp_max) Standard Deviation of Sky Infra Red Temperature(sky_ir_temp_std) Sky Infra-Red Temperature(sky_ir_temp)

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DQRID : D040421.2

Start Date	Start Time	End Date	End Time
11/10/2003	0000	02/16/2004	0230

Subject:	NSA/SKYRAD/C1 - Tracker Inoperative
DataStreams:	nsaskyrad60sC1.b1
Description:	A blown fuse resulted in the tracker not shading the PIR and B&W and the NIP not following the sun.
Measurements:	nsaskyrad60sC1.b1: Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp) Shortwave Direct Normal Irradiance, Pyrgeometer, Minima(short_direct_normal_min) Shortwave Direct Normal Irradiance, Pyrgeometer, Standard Deviation(short_direct_normal_std) 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, Maxima(down_short_diffuse_hemisp_max) Shortwave Direct Normal Irradiance, Pyrgeometer(short_direct_normal)

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DQRID : D040421.3

Start Date	Start Time	End Date	End Time
03/28/2003	0200	06/21/2006	0215

Subject:	NSA/SKYRAD/C1 - itermittant IRT bias
DataStreams:	nsaskyrad60sC1.b1
Description:	A problem with the SKYRAD IRT that itermittantly produced a gradual increase in the sky temperature measurement then a sudden correction, as compared to AERI, appears to have been caused by a combination of a failing IR detector, a poor signal cable, a contaminated (with condensation or frost) mirror or lens, and low ambient temperatures. The positive bias was apparently not consistant in either frequency or duration but on days when the unusual behavior is observed, it usually occurred from about 00:00 to 06:00 local time. The instrument was repaired and recalibrated and the signal cable replaced.
Measurements:	nsaskyrad60sC1.b1: Sky Infra Red Temperature Minima(sky_ir_temp_min) Sky Infra Red Temperature Maxima(sky_ir_temp_max) Standard Deviation of Sky Infra Red Temperature(sky_ir_temp_std) Sky Infra-Red Temperature(sky_ir_temp)

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DQRID : D051101.2

Start Date	Start Time	End Date	End Time
10/31/2005	0600	01/18/2006	0032

Subject:	NSA/SKYRAD/C1 - IRT failure
DataStreams:	nsaskyrad60sC1.b1
Description:	The IRT failed and was replaced with a spare.
Measurements:	nsaskyrad60sC1.b1: Sky Infra Red Temperature Minima(sky_ir_temp_min) Sky Infra Red Temperature Maxima(sky_ir_temp_max) Standard Deviation of Sky Infra Red Temperature(sky_ir_temp_std) Sky Infra-Red Temperature(sky_ir_temp)

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DQRID : D060209.5

Start Date	Start Time	End Date	End Time
02/07/2006	0910	02/07/2006	2350

Subject:	NSA/SKYRAD/C1 - Power outage affecting some SKYRAD instruments
DataStreams:	nsaskyrad20sC1.a0, nsaskyrad60sC1.b1, nsaskyradC1.00
Description:	During the power outage the downwelling global measurement from the PSP instrument and downwelling diffuse 8-48 instrument shows a slight increase from -5 to +0 W/m2. This is due to removal of thermal offsets induced by the AC heater during the power outage. This heater is installed within the PSP ventilator - it is necessary for the NSA/C1 climate. The downwelling longwave PIR instrument is unaffected due to case and dome temperature corrections. The IRT is AC powered and was not operational during this time period.
Measurements:	nsaskyradC1.00: null(Raw data stream - documentation not supported) nsaskyrad60sC1.b1: Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min) Down-welling unshaded pyranometer voltage(down_short_hemisp) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Standard Deviation(down_short_hemisp_std) Sky Infra-Red Temperature(sky_ir_temp) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp) Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Standard Deviation(down_short_diffuse_hemisp_std) nsaskyrad20sC1.a0: Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile Voltage(inst_global) Instantaneous Sky/Cloud Infrared(inst_sky_ir_signal) Instantaneous Uncorrected Downwelling Shortwave Diffuse, Shaded Pyranometer Thermopile Voltage(inst_diffuse)

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DQRID : D071018.1

Start Date	Start Time	End Date	End Time
07/29/1999	2041	08/05/1999	2359
09/23/2000	2257	09/25/2000	0119
03/15/2002	2036	03/18/2002	2035
09/07/2003	1103	09/19/2003	0201
11/05/2003	0339	11/07/2003	2234
01/03/2004	1153	01/06/2004	0031

Subject:	NSA/SKYRAD/C1 - Missing data
DataStreams:	nsaskyrad60sC1.b1
Description:	Data are missing and unrecoverable.
Measurements:	nsaskyrad60sC1.b1: Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min) lon(lon) Downwelling Longwave Hemispheric Irradiance, Pyrgeometer2, Minima(down_long_hemisp2_min) Down-welling unshaded pyranometer voltage(down_short_hemisp) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max) Instantaneous Downwelling Pyrgeometer Thermopile, Pyrgeometer2(inst_down_long_hemisp2_tp) Downwelling Longwave Hemispheric Irradiance, Pyrgeometer2, Standard Deviation(down_long_hemisp2_std) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Standard Deviation(down_short_hemisp_std) Downwelling Longwave Hemispheric Irradiance, Pyrgeometer1, Standard Deviation(down_long_hemisp1_std) Downwelling Longwave Hemispheric Irradiance, Pyrgeometer1, Minima(down_long_hemisp1_min) Sky Infra-Red Temperature(sky_ir_temp) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max) Shortwave Direct Normal Irradiance, Pyrgeometer, Minima(short_direct_normal_min) Instantaneous Downwelling Pyrgeometer Dome Thermistor Temperature, Pyrgeometer1(inst_down_long_hemisp1_dome_temp) base time(base_time) Downwelling Longwave Hemispheric Irradiance, Pyrgeometer2(down_long_hemisp2) Sky Infra Red Temperature Minima(sky_ir_temp_min) Shortwave Direct Normal Irradiance, Pyrgeometer, Maxima(short_direct_normal_max) Instantaneous Downwelling Pyrgeometer Case Thermistor Temperature, Pyrgeometer2(inst_down_long_hemisp2_case_temp) Downwelling Longwave Hemispheric Irradiance, Pyrgeometer1(down_long_hemisp1) Sky Infra Red Temperature Maxima(sky_ir_temp_max) Dummy altitude for Zeb(alt) Downwelling Longwave Hemispheric Irradiance, Pyrgeometer1, Maxima(down_long_hemisp1_max) Instantaneous Downwelling Pyrgeometer Thermopile, Pyrgeometer1(inst_down_long_hemisp1_tp) Shortwave Direct Normal Irradiance, Pyrgeometer, Standard Deviation(short_direct_normal_std) Time offset of tweaks from base_time(time_offset) Downwelling Longwave Hemispheric Irradiance, Pyrgeometer2, Maxima(down_long_hemisp2_max) Standard Deviation of Sky Infra Red Temperature(sky_ir_temp_std) Logger panel temperature(logger_temp) time(time) Shortwave Direct Normal Irradiance, Pyrgeometer(short_direct_normal) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp) lat(lat) Instantaneous Downwelling Pyrgeometer Case Thermistor Temperature, Pyrgeometer1(inst_down_long_hemisp1_case_temp) Instantaneous Downwelling Pyrgeometer Dome Thermistor Temperature, Pyrgeometer2(inst_down_long_hemisp2_dome_temp) Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Standard Deviation(down_short_diffuse_hemisp_std) Battery Voltage(vBatt)

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DQRID : D071025.1

Start Date	Start Time	End Date	End Time
10/03/2007	0359	10/25/2007	2148

Subject:	NSA/SKYRAD/C1 - Reprocessed: Incorrect calibration coefficient
DataStreams:	nsaskyrad20sC1.a0, nsaskyrad60sC1.b1
Description:	Installed Skyrad PSP (downwelling shortwave hemispheric irradiance) had calibration coefficient Rs applied when it should have used Rsc. ARM is using IR corrected Rsc and CFc coefficients for PSPs deployed at all facilities. PSP #32026 should use RSc@45=8.7578 ?V/W/m? and not Rs@45=8.6335. Reprocessed to correct downwelling shortwave hemispheric irradiance (DS) by: DS(new) = (DS(old) / 115.83 ) * 114.18 Reprocessing completed March 2008.
Measurements:	nsaskyrad60sC1.b1: Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max) Down-welling unshaded pyranometer voltage(down_short_hemisp) Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Standard Deviation(down_short_hemisp_std) nsaskyrad20sC1.a0: Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile Voltage(inst_global)

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DQRID : D080107.2

Start Date	Start Time	End Date	End Time
12/16/2007	0000	12/24/2007	2359

Subject:	NSA/SKYRAD/C1 - Instrument cleaning effects
DataStreams:	nsaskyrad20sC1.a0, nsaskyrad60sC1.b1
Description:	Starting Dec 16th the Skyrad PIR1 and PIR2 (down_long_hemispheric)started differing by greater than 30W/m2 at times. This is much greater than expected for these instruments (typical is <10-15 W/m2). NSA OMIS reports and observer comments reveal that PM periodically clean the snow from the IRT and ventilator fans on Skyrad and Gndrad. In the case of the Skyrad PIRs, one lies in the wind shadow of the other and builds up more snow which is periodically cleaned out and then builds up again causing the PIR1 PIR2 discrepancies. Disregard down_long_hemispheric during this time period. However, data suggests PIR2 is most likely at fault - potentially use PIR1 data during this time period.
Measurements:	nsaskyrad60sC1.b1: Downwelling Longwave Hemispheric Irradiance, Pyrgeometer2, Minima(down_long_hemisp2_min) Instantaneous Downwelling Pyrgeometer Thermopile, Pyrgeometer2(inst_down_long_hemisp2_tp) Downwelling Longwave Hemispheric Irradiance, Pyrgeometer2, Standard Deviation(down_long_hemisp2_std) Downwelling Longwave Hemispheric Irradiance, Pyrgeometer1, Standard Deviation(down_long_hemisp1_std) Downwelling Longwave Hemispheric Irradiance, Pyrgeometer2, Maxima(down_long_hemisp2_max) Downwelling Longwave Hemispheric Irradiance, Pyrgeometer1, Minima(down_long_hemisp1_min) Instantaneous Downwelling Pyrgeometer Dome Thermistor Temperature, Pyrgeometer1(inst_down_long_hemisp1_dome_temp) Downwelling Longwave Hemispheric Irradiance, Pyrgeometer2(down_long_hemisp2) Instantaneous Downwelling Pyrgeometer Case Thermistor Temperature, Pyrgeometer1(inst_down_long_hemisp1_case_temp) Instantaneous Downwelling Pyrgeometer Case Thermistor Temperature, Pyrgeometer2(inst_down_long_hemisp2_case_temp) Downwelling Longwave Hemispheric Irradiance, Pyrgeometer1(down_long_hemisp1) Downwelling Longwave Hemispheric Irradiance, Pyrgeometer1, Maxima(down_long_hemisp1_max) Instantaneous Downwelling Pyrgeometer Dome Thermistor Temperature, Pyrgeometer2(inst_down_long_hemisp2_dome_temp) Instantaneous Downwelling Pyrgeometer Thermopile, Pyrgeometer1(inst_down_long_hemisp1_tp) nsaskyrad20sC1.a0: Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Pyrgeometer1(inst_down_long_hemisp1_case_resist) Instantaneous Downwelling Pyrgeometer Thermopile, Pyrgeometer2(inst_down_long_hemisp2_tp) Instantaneous Downwelling Pyrgeometer Thermopile, Pyrgeometer1(inst_down_long_hemisp1_tp) Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Pyrgeometer2(inst_down_long_hemisp2_dome_resist) Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Pyrgeometer2(inst_down_long_hemisp2_case_resist) Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Pyrgeometer1(inst_down_long_hemisp1_dome_resist)

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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) Sky Infra Red Temperature Maxima(sky_ir_temp_max) Standard Deviation of Sky Infra Red Temperature(sky_ir_temp_std) 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: Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp) Shortwave Direct Normal Irradiance, Pyrgeometer, Minima(short_direct_normal_min) Shortwave Direct Normal Irradiance, Pyrgeometer, Standard Deviation(short_direct_normal_std) 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, Maxima(down_short_diffuse_hemisp_max) Shortwave Direct Normal Irradiance, Pyrgeometer(short_direct_normal) nsaskyrad20sC1.a0: Instantaneous Direct Normal Shortwave Irradiance, Pyheliometer Thermopile Voltage(inst_direct_normal) Instantaneous Uncorrected Downwelling Shortwave Diffuse, Shaded Pyranometer Thermopile Voltage(inst_diffuse)

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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, Minima(down_short_diffuse_hemisp_min) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp) Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Standard Deviation(down_short_diffuse_hemisp_std) Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max) nsaskyrad20sC1.a0: Instantaneous Direct Normal Shortwave Irradiance, Pyheliometer Thermopile Voltage(inst_direct_normal) Instantaneous Uncorrected Downwelling Shortwave Diffuse, Shaded Pyranometer Thermopile Voltage(inst_diffuse)

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DQRID : D090209.4

Start Date	Start Time	End Date	End Time
04/01/1999	0000	12/21/2000	1925

Subject:	NSA/SKYRAD/C1 - Reprocess: IRT insufficiently heated
DataStreams:	nsaskyrad60sC1.b1
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. Data will be reprocessed, but users can correct data using the following correction factor: If T_reference < -5?C, then IRT_corrected = (IRT_original - 32.993K)/0.87238 where T_reference can be estimated with the ambient temperature (e.g. inst_down_long_hemisp_dome_temp or inst_down_long_dome_temp)
Measurements:	nsaskyrad60sC1.b1: Sky Infra Red Temperature Minima(sky_ir_temp_min) Sky Infra Red Temperature Maxima(sky_ir_temp_max) Standard Deviation of Sky Infra Red Temperature(sky_ir_temp_std) Sky Infra-Red Temperature(sky_ir_temp)

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END OF DATA