DQR ID | Subject | Data Streams Affected |
---|
D110628.2 | SGP/SIRS/C1 - NIP failure | sgpsirs20sC1.a0, sgpsirsC1.b1 |
D110811.1 | SGP/BRS/C1 - SW Direct Normal incorrect | sgpbrs20sC1.a0, sgpbrsC1.b1 |
D110902.4 | SGP/BRS/C1 - Tracker failure | sgpbrs20sC1.a0, sgpbrsC1.b1 |
D111202.1 | SGP/SIRS/C1 - NIP Failure | sgpsirs20sC1.a0, sgpsirsC1.b1 |
D120118.1 | SGP/BRS/C1 - Reprocess: Incorrect calibration coefficient for down_short_diffuse_hemisp | sgpbrs20sC1.a0, sgpbrsC1.b1 |
D120302.2 | SGP/SIRS/C1 - Reprocess: Incorrect downwelling longwave calibration coefficient | sgpsirs20sC1.a0, sgpsirsC1.b1 |
D120420.8 | SGP/QCRAD/C1 - NIP failure | sgpqcrad1longC1.c1, sgpqcrad1longC1.c2, sgpqcrad1longC1.s1, sgpqcrad1longC1.s2 |
Subject: | SGP/SIRS/C1 - NIP failure |
DataStreams: | sgpsirs20sC1.a0, sgpsirsC1.b1
|
Description: | The short_direct_normal (NIP instrument) cable failed during this time period. Data are
not recoverable.
Users can derive an estimate of direct normal values using the following formula:
short_direct_normal = (down_short_hemisp - down_short_diffuse_hemisp)/cos(zenith angle) |
Measurements: | sgpsirs20sC1.a0:
sgpsirsC1.b1: - Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
- short_direct_normal_std
- Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
- Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
|
Subject: | SGP/BRS/C1 - SW Direct Normal incorrect |
DataStreams: | sgpbrs20sC1.a0, sgpbrsC1.b1
|
Description: | Apparent lightning strike in the instrument cluster area resulted in a failed NIP. Data
are missing or incorrect.
The SIRS was due for calibration change outs so the US, DS, DD and NIP were replaced. The
updated program was loaded at approximately 06/14/2011 1739 GMT.
An estimate of direct normal values can be derived using the following formula:
short_direct_normal = (down_short_hemisp - down_short_diffuse_hemisp)/cos(zenith angle) |
Measurements: | sgpbrsC1.b1: - Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
- Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
- short_direct_normal_std
- Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
sgpbrs20sC1.a0:
|
Subject: | SGP/BRS/C1 - Tracker failure |
DataStreams: | sgpbrs20sC1.a0, sgpbrsC1.b1
|
Description: | Apparent lightning strike in the instrument cluster area resulted in a failed tracker.
Site ops found the suntracker at home position, power cycled the suntracker and replaced
fuse. |
Measurements: | sgpbrsC1.b1: - 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)
sgpbrs20sC1.a0:
|
Subject: | SGP/SIRS/C1 - NIP Failure |
DataStreams: | sgpsirs20sC1.a0, sgpsirsC1.b1
|
Description: | The short_direct_normal (NIP instrument) cable failed (broken wire in NIP connector)
during this time period. Data are not recoverable.
An estimate of direct normal values can be derived using the following formula:
short_direct_normal = (down_short_hemisp - down_short_diffuse_hemisp)/cos(zenith angle) |
Measurements: | sgpsirs20sC1.a0:
sgpsirsC1.b1: - Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
- short_direct_normal_std
- Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
- Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
|
Subject: | SGP/BRS/C1 - Reprocess: Incorrect calibration coefficient for down_short_diffuse_hemisp |
DataStreams: | sgpbrs20sC1.a0, sgpbrsC1.b1
|
Description: | Applied calibration coefficient and serial number for down_short_diffuse was incorrect for
the specified period.
Perform the following calculation to correct the data,
DD= downwelling diffuse instrument:
Old Calibration coefficient = 114.74[W/m2\mV]
New Calibration Coefficient = 109.51[W/m2\mV]
DD(new)[W/m2]=( DD(old)[W/m2]/ 114.74 [W/m2\mV] )* 109.51 [W/m2/mV] |
Measurements: | sgpbrsC1.b1: - 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)
sgpbrs20sC1.a0:
|
Subject: | SGP/SIRS/C1 - Reprocess: Incorrect downwelling longwave calibration coefficient |
DataStreams: | sgpsirs20sC1.a0, sgpsirsC1.b1
|
Description: | Calibration coefficient for downwelling longwave was incorrect for the specified period.
To correct the one minute data b1 datastream follow the procedure below:
1) Obtain the following variables from the 20s datastream for each one minute of the
affected time range:
inst_down_long_shaded_dome_resist (Rd)
inst_down_long_shaded_case_resist (Rc)
inst_down_long_hemisp_shaded_tp (tpDIR_mV)
2) using the 20s tp voltage in mV convert to uV.
tpDIR[uV] = inst_down_long_hemisp_shaded_tp[mV]*1000[uV/mV]
3) For each 20s data entry convert Rd and Rc to temperature
Td =1/ (a0 + (a1*LN (Rd*1000) + (a2*LN (Rd*1000)^3)))
Tc = 1/ (a0 + (a1*LN (Rc*1000) + (a2*LN (Rc*1000)^3)))
where a0 = 0.0010295
a1 = 0.0002391
a2 = 0.0000001568
4) Apply for each 20s data entry: (correct k1=0.2762)
WinDIR(W/m2)= [0.2762*tpDIR] + Sigma*Tc^4 -4*Sigma*(Td^4 - Tc^4)
where, Sigma = 5.6704E-8 (Stefan-Boltzman Const)
5) Generate new 1 minute average from the 3 20-second measurements |
Measurements: | sgpsirs20sC1.a0: - inst_down_long_shaded_dome_resist
- inst_down_long_shaded_case_resist
- Irradiance, longwave, downwelling, hemispheric, thermopile (Shaded Pyrgeometer1)(inst_down_long_hemisp_shaded_tp)
sgpsirsC1.b1: - Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
- down_long_hemisp_shaded_std
- Downwelling Longwave Hemispheric Irrad., Shaded Ventilated Pyrgeometer, Minima(down_long_hemisp_shaded_min)
- Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
- inst_down_long_shaded_case_temp
- Downwelling Longwave Hemispheric Irradiance, Shaded Ventilated Pyrgeometer(down_long_hemisp_shaded)
- inst_down_long_shaded_dome_temp
|
Subject: | SGP/QCRAD/C1 - NIP failure |
DataStreams: | sgpqcrad1longC1.c1, sgpqcrad1longC1.c2, sgpqcrad1longC1.s1, sgpqcrad1longC1.s2
|
Description: | The short_direct_normal (NIP instrument) cable failed during this time period. Data are
not recoverable.
Users can derive an estimate of direct normal values using the following formula:
short_direct_normal = (down_short_hemisp - down_short_diffuse_hemisp)/cos(zenith angle)
Documented in instrument DQR D110628.2 |
Measurements: | sgpqcrad1longC1.c1: - Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
sgpqcrad1longC1.c2: - Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
sgpqcrad1longC1.s2: - Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
sgpqcrad1longC1.s1: - Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
|