Description: | Data quality this month is pretty good, with some exceptions. Nighttime offsets in the
Downwelling pyranometer (DS) average about -3 W/m^2 for the month. The Downwelling
Diffuse pyranometer (DD) averages about -4 W/m^2 for its nighttime offset. There are
moderate inconsistencies between the Global (DS), Direct (NIP) and Diffuse (DD)
components for the 6th and 7th in the afternoon and the 4th, 5th, 7th, 11th, 13th, 22nd,
This could be caused by the use of a
constant pyranometer responsivity for all solar zenith angles, or the switchover from
probable factor in the error. It should also be noted that the calibration factors for the
PSP's have a
tolerance of plus or minus 5% and the NIP has a tolerance of plus or minus 3%.
Upwelling Longwave goes below empirical limits on the 4th
from 06:20 to 16:20 GMT and on the 7th from 09:25 to 13:30 GMT. The winter Longwave
empirical limit
of 250 W/m^2 is currently under further review. (A reading of 250 W/m^2 suggests a
temperature
between 5 and 20 degrees Fahrenheit.) Something happens with the Upwelling Shortwave (US)
on the 3rd where
it exceeds its daytime empirical limit. Snowy conditions is the likely cause. US also dips
belows its nighttime empirical limit
for short durations on the local nights of the 15th, 17th, and 22nd. |
Measurements: | sgpsirsE1.a0: - Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
- time_offset
- lat
- short_diffuse
- Observed direct-beam normal solar irradiance(nip)
- up_long_case_resist
- Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
- Irradiance, longwave, downwelling, hemispheric(down_long_hemisp)
- alt
- down_long_case_resist
- up_long_dome_resist
- Radiation, shortwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_short_hemisp)
- lon
- down_long_dome_resist
- base_time
sgpsirsE1.a1: - down_short_diffuse_hemisp_std
- short_direct_normal_std
- Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
- Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Maxima(up_long_hemisp_max)
- Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
- down_short_hemisp_std
- lon
- down_long_hemisp_max
- down_long_hemisp_min
- Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
- down_long_hemisp_std
- Irradiance, longwave, downwelling, hemispheric(down_long_hemisp)
- time_offset
- lat
- Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
- Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
- up_long_hemisp_std
- Radiation, shortwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_short_hemisp)
- Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
- Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
- Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
- alt
- up_short_hemisp_std
- Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
- Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
- base_time
- Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
- Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
- Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
- vBatt
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