DQRID : D050809.1
Start DateStart TimeEnd DateEnd Time
08/07/2005012509/21/20051600
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Subject:
SGP/MFRSR/E4 - Erratic head temp and missing irradiance data
DataStreams:sgpmfrsrE4.b1, sgpmfrsrE4.a0, sgpmfrsrE4.00
Description:
This problem started out with erratic/low head temperature, and expanded to include 
missing irradiance data.  Maintenance on 8/24 had the unexpected result of causing channels 870 
and 940 to flat line.  The 8/24 maintenance did not fix the head temp problem.  On 9/21 
maintenance fixed the temp and irradiance issue.

Notwithstanding the low head temps, the irradiance data (when available) look OK.  
However, because the instrument is calibrated and designed to run with temps around 40, be 
cautious about using data covered by this DQR.
Suggestions: 
Measurements:sgpmfrsrE4.a0:
  • Narrowband Hemispheric Irradiance, Filter 6(hemisp_narrowband_filter6_raw)
  • Diffuse narrowband hemispheric irradiance, filter 6(diffuse_hemisp_narrowband_filter6_raw)
  • Narrowband Direct Horizontal Irradiance, Filter 5, cosine corrected(direct_horizontal_narrowband_filter5)
  • Narrowband Direct Horizontal Irradiance, Filter 6, cosine corrected(direct_horizontal_narrowband_filter6)
  • Detector temperature(head_temp)
  • Diffuse Narrowband Hemispheric Irradiance, Filter 6, offset corrected(diffuse_hemisp_narrowband_filter6)
  • Narrowband diffuse hemispheric irradiance, filter 5, offset and cosine corrected(diffuse_hemisp_narrowband_filter5)
  • Narrowband Hemispheric Irradiance, Filter 5, offset corrected(hemisp_narrowband_filter5)
  • Diffuse Narrowband Hemispheric Irradiance, Filter 5(diffuse_hemisp_narrowband_filter5_raw)
  • Narrowband hemispheric irradiance, filter 5(hemisp_narrowband_filter5_raw)
  • Narrowband hemispheric irradiance, filter 6, nominal wavelength is 935 nm(hemisp_narrowband_filter6)
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sgpmfrsrE4.b1:
  • Direct normal narrowband irradiance, filter 6, offset corrected(direct_normal_narrowband_filter6)
  • Narrowband Direct Normal Irradiance, Filter 5(direct_normal_narrowband_filter5)
  • Diffuse Narrowband Hemispheric Irradiance, Filter 6, offset corrected(diffuse_hemisp_narrowband_filter6)
  • Narrowband diffuse hemispheric irradiance, filter 5, offset and cosine corrected(diffuse_hemisp_narrowband_filter5)
  • Narrowband Direct Horizontal Irradiance, Filter 6, cosine corrected(direct_horizontal_narrowband_filter6)
  • Narrowband Direct Horizontal Irradiance, Filter 5, cosine corrected(direct_horizontal_narrowband_filter5)
  • Detector temperature(head_temp)
  • Narrowband hemispheric irradiance, filter 6, nominal wavelength is 935 nm(hemisp_narrowband_filter6)
  • Narrowband Hemispheric Irradiance, Filter 5, offset corrected(hemisp_narrowband_filter5)
more
sgpmfrsrE4.00:
  • (Raw data stream - documentation not supported)
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