Data Quality Reports for Session: 104144 User: motoyoitoh Completed: 02/08/2007


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D010720.1NSA/SKYRAD/C2 - wrong calibration coefficent for PIRd in ATQnsaskyradC2.00, nsaskyrad20sC1.a1, nsaskyrad60sC1.a1, nsaskyrad60sC1.b1
D021111.12NSA/SKYRAD/C1 - PIR data suspectnsaskyrad60sC1.a1, nsaskyrad60sC1.b1
D021111.13NSA/SKYRAD/C1 - Shaded PIR data unreasonablensaskyrad60sC1.a1, nsaskyrad60sC1.b1
D021111.20NSA/SKYRAD/C1 - PIR data suspectnsaskyrad60sC1.a1, nsaskyrad60sC1.b1
D021111.6NSA/SKYRAD/C1 - Unshaded PIR maintenancensaskyrad60sC1.a1, nsaskyrad60sC1.b1
D021111.7NSA/SKYRAD/C1 - Miscalibrated Unshaded PIR datansaskyrad60sC1.a1, nsaskyrad60sC1.b1
D021111.8NSA/SKYRAD/C1 - Noise in Unshaded PIR datansaskyrad60sC1.a1, nsaskyrad60sC1.b1
D021213.2NSA/SKYRAD/C1 - NIP shaded by skyrad stand around local midnightnsaskyrad60sC1.a1, nsaskyrad60sC1.b1
D021213.4NSA/SKYRAD/C1 - PSP shaded by MFRSR after local midnightnsaskyrad60sC1.a1, nsaskyrad60sC1.b1
D030821.2NSA/SKYRAD/C1 - IRT incorrect min/max valuensaskyrad60sC1.b1
D031007.2NSA/SKYRAD/C1 - IRT measurements during precipitation eventsnsaskyrad60sC1.b1
D031226.1NSA/SKYRAD/C1 - NSA B&W nighttime offset in Barrow too largensaskyradC1.00, nsaskyrad60sC1.a1, nsaskyrad60sC1.b1
D060724.2NSA/SKYRAD/C1 - Summer solstice shading of radiometersnsaskyrad60sC1.b1


DQRID : D010720.1
Start DateStart TimeEnd DateEnd Time
07/06/2001230007/19/20010100
Subject:
NSA/SKYRAD/C2 - wrong calibration coefficent for PIRd in ATQ
DataStreams:nsaskyradC2.00, nsaskyrad20sC1.a1, nsaskyrad60sC1.a1, nsaskyrad60sC1.b1
Description:
Due to confusion over ARM calibration policy, a revised calibration was installed
and was in place for the duration of the time period indicated.  When the error
was noted, the original calibration was re-installed.

Users may notice discontinuities in PIRd data at the time boundaries of this
DQR.
Measurements:nsaskyrad20sC1.a1:
  • Instantaneous Downwelling Pyrgeometer Thermopile Voltage, Shaded Pyrgeometer(inst_down_long_hemisp_shaded_tp)

nsaskyrad60sC1.a1:
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Standard
    Deviation(down_long_hemisp_shaded_std)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Minima(down_long_hemisp_shaded_min)

nsaskyrad60sC1.b1:
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Minima(down_long_hemisp_shaded_min)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Standard
    Deviation(down_long_hemisp_shaded_std)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)

nsaskyradC2.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)


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DQRID : D021111.12
Start DateStart TimeEnd DateEnd Time
04/26/2001090004/26/20011800
Subject:
NSA/SKYRAD/C1 - PIR data suspect
DataStreams:nsaskyrad60sC1.a1, nsaskyrad60sC1.b1
Description:
PIR shaded and PIR unshaded show unusual differences during this time period, frosting or 
icing is the most probable explanation but we don't know for sure.
Measurements:nsaskyrad60sC1.a1:
  • PIR1 unshaded standard deviation(pir1_sd)
  • PIR1 unshaded minimum(pir1_min)
  • PIR1 unshaded maximum(pir1_max)
  • PIR1 unshaded mean(pir1_mean)

nsaskyrad60sC1.b1:
  • PIR1 unshaded minimum(pir1_min)
  • PIR1 unshaded maximum(pir1_max)
  • PIR1 unshaded mean(pir1_mean)
  • PIR1 unshaded standard deviation(pir1_sd)


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DQRID : D021111.13
Start DateStart TimeEnd DateEnd Time
11/05/2001000011/07/20012010
Subject:
NSA/SKYRAD/C1 - Shaded PIR data unreasonable
DataStreams:nsaskyrad60sC1.a1, nsaskyrad60sC1.b1
Description:
Scientificly unreasonable data values, the problem disappeared after the datalogger was 
exchanged with the spare. The data logger was exchanged on 11/7 at 20:10 GMT.
Measurements:nsaskyrad60sC1.a1:
  • PIR shaded maximum(pirs_max)
  • PIR shaded standard deviation(pirs_sd)
  • PIR shaded minimum(pirs_min)
  • PIR shaded mean(pirs_mean)

nsaskyrad60sC1.b1:
  • PIR shaded mean(pirs_mean)
  • PIR shaded minimum(pirs_min)
  • PIR shaded maximum(pirs_max)
  • PIR shaded standard deviation(pirs_sd)


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DQRID : D021111.20
Start DateStart TimeEnd DateEnd Time
04/25/2001100004/25/20011900
04/26/2001090004/26/20011800
Subject:
NSA/SKYRAD/C1 - PIR data suspect
DataStreams:nsaskyrad60sC1.a1, nsaskyrad60sC1.b1
Description:
PIR shaded and PIR unshaded show unusual differences during this time period, frosting or 
icing is one possible explanation but we don't know.
Measurements:nsaskyrad60sC1.a1:
  • PIR shaded standard deviation(pirs_sd)
  • PIR1 unshaded maximum(pir1_max)
  • PIR shaded minimum(pirs_min)
  • PIR shaded mean(pirs_mean)
  • PIR1 unshaded standard deviation(pir1_sd)
  • PIR shaded maximum(pirs_max)
  • PIR1 unshaded minimum(pir1_min)
  • PIR1 unshaded mean(pir1_mean)

nsaskyrad60sC1.b1:
  • PIR1 unshaded maximum(pir1_max)
  • PIR shaded mean(pirs_mean)
  • PIR shaded maximum(pirs_max)
  • PIR1 unshaded minimum(pir1_min)
  • PIR1 unshaded mean(pir1_mean)
  • PIR shaded minimum(pirs_min)
  • PIR1 unshaded standard deviation(pir1_sd)
  • PIR shaded standard deviation(pirs_sd)


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DQRID : D021111.6
Start DateStart TimeEnd DateEnd Time
03/15/2001234503/16/20010045
Subject:
NSA/SKYRAD/C1 - Unshaded PIR maintenance
DataStreams:nsaskyrad60sC1.a1, nsaskyrad60sC1.b1
Description:
Unreasonable data from 3/15 23:45 until 3/16 0:45 due to exchange of PIR instrument to the 
PIR spare (32054F3). This was done so the PIR could go to NOAA/CMDL in Boulder for 
calibration as part of the IPARSC II IOP and be included in this work.
Measurements:nsaskyrad60sC1.a1:
  • PIR1 unshaded standard deviation(pir1_sd)
  • PIR1 unshaded minimum(pir1_min)
  • PIR1 unshaded maximum(pir1_max)
  • PIR1 unshaded mean(pir1_mean)

nsaskyrad60sC1.b1:
  • PIR1 unshaded minimum(pir1_min)
  • PIR1 unshaded maximum(pir1_max)
  • PIR1 unshaded mean(pir1_mean)
  • PIR1 unshaded standard deviation(pir1_sd)


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DQRID : D021111.7
Start DateStart TimeEnd DateEnd Time
03/16/2001004503/25/20010235
Subject:
NSA/SKYRAD/C1 - Miscalibrated Unshaded PIR data
DataStreams:nsaskyrad60sC1.a1, nsaskyrad60sC1.b1
Description:
Calibration coefficient for PIR spare (32054F3) was updated on 3/25 2:35 GMT. The old PIR 
cal coefficient was used during this period. The PIR spare (32054F3) was calibrated by 
NOAA/CMDL in Boulder prior to the IOP and replacement on 3/16 when the original station PIR 
was shipped to Boulder for a post IOP calibration.
Measurements:nsaskyrad60sC1.a1:
  • PIR1 unshaded standard deviation(pir1_sd)
  • PIR1 unshaded minimum(pir1_min)
  • PIR1 unshaded maximum(pir1_max)
  • PIR1 unshaded mean(pir1_mean)

nsaskyrad60sC1.b1:
  • PIR1 unshaded minimum(pir1_min)
  • PIR1 unshaded maximum(pir1_max)
  • PIR1 unshaded mean(pir1_mean)
  • PIR1 unshaded standard deviation(pir1_sd)


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DQRID : D021111.8
Start DateStart TimeEnd DateEnd Time
10/06/2001100011/07/20012359
Subject:
NSA/SKYRAD/C1 - Noise in Unshaded PIR data
DataStreams:nsaskyrad60sC1.a1, nsaskyrad60sC1.b1
Description:
Noise increased and an offset from shaded PIR became apparent during this period.
Measurements:nsaskyrad60sC1.a1:
  • PIR1 unshaded standard deviation(pir1_sd)
  • PIR1 unshaded minimum(pir1_min)
  • PIR1 unshaded maximum(pir1_max)
  • PIR1 unshaded mean(pir1_mean)

nsaskyrad60sC1.b1:
  • PIR1 unshaded minimum(pir1_min)
  • PIR1 unshaded maximum(pir1_max)
  • PIR1 unshaded mean(pir1_mean)
  • PIR1 unshaded standard deviation(pir1_sd)


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DQRID : D021213.2
Start DateStart TimeEnd DateEnd Time
05/01/1999000008/10/19990000
05/01/2000000008/10/20000000
05/01/2001000008/10/20010000
05/01/2002000008/10/20020000
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 DateStart TimeEnd DateEnd Time
05/01/1999000008/10/19990000
05/01/2000000008/10/20000000
05/01/2001000008/10/20010000
05/01/2002000008/10/20020000
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 : D030821.2
Start DateStart TimeEnd DateEnd Time
04/01/2001000003/03/20032359
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/Cloud Infra-Red Temperature Minima(sky_ir_temp_min)
  • Sky/Cloud Infra-Red Temperature Maxima(sky_ir_temp_max)
  • Sky/Cloud Infra-Red Temperature(sky_ir_temp)


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DQRID : D031007.2
Start DateStart TimeEnd DateEnd Time
04/01/1999000003/28/20030200
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/Cloud Infra-Red Temperature Minima(sky_ir_temp_min)
  • Sky/Cloud Infra-Red Temperature Maxima(sky_ir_temp_max)
  • Sky/Cloud Infra-Red Temperature Standard Deviation(sky_ir_temp_std)
  • Sky/Cloud Infra-Red Temperature(sky_ir_temp)


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DQRID : D031226.1
Start DateStart TimeEnd DateEnd Time
08/20/2001000001/23/20020000
Subject:
NSA/SKYRAD/C1 - NSA B&W nighttime offset in Barrow too large
DataStreams:nsaskyradC1.00, nsaskyrad60sC1.a1, nsaskyrad60sC1.b1
Description:
This problem only became apparent as NSA C1 nights became long enough for full darkness. 
The shaded global diffuse instrument (Eppley 8-48) showed a negative nighttime offset 
larger than the expected 0 to -4 W/m2. Typically -5 to -8 W/m2. This size of offset is not 
uncommon with Eppley PSPs but not observed with Eppley 8-48s.  The problem was corrected 
with replacement of mounting screws which were creating a ground loop.
Measurements:nsaskyrad60sC1.a1:
  • PSP shaded minimum(psps_min)
  • PSP shaded maximum(psps_max)
  • PSP shaded mean(psps_mean)
  • PSP shaded standard deviation(psps_sd)
  • 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 Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
    Maxima(down_short_diffuse_hemisp_max)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
    Standard Deviation(down_short_diffuse_hemisp_std)

nsaskyradC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

nsaskyrad60sC1.b1:
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
    Minima(down_short_diffuse_hemisp_min)
  • PSP shaded maximum(psps_max)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
    Maxima(down_short_diffuse_hemisp_max)
  • PSP shaded minimum(psps_min)
  • PSP shaded mean(psps_mean)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
  • PSP shaded standard deviation(psps_sd)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
    Standard Deviation(down_short_diffuse_hemisp_std)


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DQRID : D060724.2
Start DateStart TimeEnd DateEnd Time
05/08/1999000008/05/19990000
05/08/2000000008/05/20000000
05/08/2001000008/05/20010000
05/08/2002000008/05/20020000
05/08/2003000008/05/20030000
05/08/2004000008/05/20040000
05/08/2005000008/05/20050000
05/08/2006000008/05/20060000
Subject:
NSA/SKYRAD/C1 - Summer solstice shading of radiometers
DataStreams:nsaskyrad60sC1.b1
Description:
On and around the summer solstice, the NIP (Direct Normal shortwave measurement) and PSP 
(global hemispheic shortwave measurement) radiometers are shaded by other instruments or 
support structures.  Shading azimuths have been determined for this site.  The radiometer 
mentor suggests not using the data from the NIP and PSP radiometers when the sun is 
within the following azimuth bounds (typically from May 8th to August 5th of each year):
Instrmt Obstruction     AzStart     AzEnd     
NIP     rad table       346         358
NIP     met tower       13          15
PSP     mfrsr           6           16
Measurements:nsaskyrad60sC1.b1:
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp)
  • NIP maximum(nip_max)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard
    Deviation(down_short_hemisp_std)
  • NIP standard deviation(nip_sd)
  • NIP minimum(nip_min)
  • PSP1 unshaded minimum(psp1_min)
  • PSP shaded maximum(psps_max)
  • Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
  • NIP mean(nip_mean)
  • PSP shaded minimum(psps_min)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_short_hemisp_min)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
  • PSP shaded mean(psps_mean)
  • PSP1 unshaded maximum(psp1_max)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
  • PSP1 unshaded standard deviation(psp1_sd)
  • PSP shaded standard deviation(psps_sd)
  • PSP1 unshaded mean(psp1_mean)


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