DQR ID | Subject | Data Streams Affected |
---|
D021111.12 | NSA/SKYRAD/C1 - PIR data suspect | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
D021111.13 | NSA/SKYRAD/C1 - Shaded PIR data unreasonable | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
D021111.20 | NSA/SKYRAD/C1 - PIR data suspect | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
D021111.6 | NSA/SKYRAD/C1 - Unshaded PIR maintenance | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
D021111.7 | NSA/SKYRAD/C1 - Miscalibrated Unshaded PIR data | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
D021111.8 | NSA/SKYRAD/C1 - Noise in Unshaded PIR data | nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
D021212.1 | NSA/GNDRAD/C1 - Instrument Maintenance | nsagndrad60sC1.a1, nsagndrad60sC1.b1 |
D021212.2 | NSA/GNDRAD/C1 - PSP erroneously replaced by B&W | nsagndrad60sC1.a1, nsagndrad60sC1.b1 |
D021212.3 | NSA/GNDRAD/C1 - Instrument maintenance | nsagndrad60sC1.a1, nsagndrad60sC1.b1 |
D021212.4 | NSA/GNDRAD/C1 - Bad calibrations applied | nsagndrad60sC1.a1, nsagndrad60sC1.b1 |
D021212.9 | NSA/GNDRAD/C1 - PSP Data corrupted by brief spike | nsagndrad60sC1.a1, nsagndrad60sC1.b1 |
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 |
D030821.2 | NSA/SKYRAD/C1 - IRT incorrect min/max value | nsaskyrad60sC1.b1 |
D031007.2 | NSA/SKYRAD/C1 - IRT measurements during precipitation events | nsaskyrad60sC1.b1 |
D031226.1 | NSA/SKYRAD/C1 - NSA B&W nighttime offset in Barrow too large | nsaskyradC1.00, nsaskyrad60sC1.a1, nsaskyrad60sC1.b1 |
D060724.2 | NSA/SKYRAD/C1 - Summer solstice shading of radiometers | nsaskyrad60sC1.b1 |
D080919.1 | NSA/GNDRAD/C1 - Net radiometer removed | nsagndrad60sC1.a1, nsagndrad60sC1.b1 |
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.b1: - Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
- short_direct_normal_std
- Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
- Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
nsaskyrad60sC1.a1: - nip_max
- nip_sd
- nip_min
- nip_mean
|
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.b1: - Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
- down_short_hemisp_std
- Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
- Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
nsaskyrad60sC1.a1: - psp1_sd
- psp1_mean
- psp1_min
- psp1_max
|
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: | nsaskyradC1.00: - Raw data stream - documentation not supported
nsaskyrad60sC1.b1: - psps_sd
- Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
- psps_mean
- psps_min
- Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
- down_short_diffuse_hemisp_std
- Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
- psps_max
nsaskyrad60sC1.a1: - psps_max
- down_short_diffuse_hemisp_std
- Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
- Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
- Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
- psps_sd
- psps_mean
- psps_min
|
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: - psps_sd
- psp1_sd
- Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
- psps_mean
- psps_min
- Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
- nip_sd
- Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
- psp1_min
- psp1_max
- Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
- nip_mean
- Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
- nip_min
- psps_max
- nip_max
- psp1_mean
- down_short_hemisp_std
- short_direct_normal_std
- Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
|