DQRID : D960404.4
Start DateStart TimeEnd DateEnd Time Data Quality Metric
03/21/1996000004/02/19962359Suspect
more
Subject:
Unshaded PSP dirty domes
DataStreams:sgpsirosE11.a1, sgpsirosE8.a1
Description:
Subject: Unshaded PSP dirty domes

Platform/Measurement: sgpsiros/unshaded PSP

What location was the data collected at: E8, E11                                

Period of time in question
        Begin Date  03/21/96 
        End Date    04/02/96 

Discussion of Problem:
 
   Large differences between estimates of downwelling hemispheric
   shortwave radiation from the unshaded PSP and the combination
   of the NIP and shaded PSP were observed as early as March 21,
   1996 and lasted through April 2, 1996 when Site Operations
   cleaned the radiometer domes at E8.  The differences were as
   high as 150 W/m^2 during the late afternoon on several days
   within this period. The cause of the differences seems to be
   dirt on the unshaded PSP dome (which was observed before the
   dome was cleaned) causing the estimate from the unshaded PSP
   to be lower than expected.  The dome condition observation
   was obtained by email communication with Site Operatons
   staff and is not know to be logged elsewhere.

   Differences in the downwelling hemispheric shortwave estimates
   at E11 (though not nearly as large as at E8) showed improvement
   after dome cleaning activities on April 2, as well.

   A postscript file attachment depicts the data for E8 on 
   April 2 and the cleaning of the dome can be identified at the time:
   Day of Year 93.82, or at about 1930Z.
Suggestions: 
Measurements:sgpsirosE11.a1:
  • lat
  • up_long_hemisp
  • diffuse_hemisp_broadband
  • down_short_hemisp
  • up_short_hemisp
  • hemisp_broadband
  • alt
  • flag_zero_cosine1-24
  • up_long_case_temp
  • logger_volt
  • time_offset
  • up_long_dome_temp
  • channel
  • hemisp_narrowband
  • diffuse_hemisp_narrowband
  • down_long_case_temp
  • flag_zero_divisor1-24
  • direct_norm_narrowband
  • base_time
  • down_short_diffuse_hemisp
  • down_long_diffuse_hemisp
  • lon
  • logger_temp
  • down_long_dome_temp
  • direct_norm_broadband
  • mfrsr_temp
  • short_direct_normal
  • therm_volt
  • flag_ln_error1-24
  • flag_nighttime1-24
more
sgpsirosE8.a1:
  • down_short_diffuse_hemisp
  • logger_volt
  • lat
  • alt
  • flag_zero_divisor1-24
  • base_time
  • channel
  • down_long_case_temp
  • hemisp_broadband
  • flag_ln_error1-24
  • therm_volt
  • down_long_diffuse_hemisp
  • time_offset
  • diffuse_hemisp_broadband
  • mfrsr_temp
  • up_short_hemisp
  • direct_norm_narrowband
  • up_long_dome_temp
  • hemisp_narrowband
  • diffuse_hemisp_narrowband
  • flag_nighttime1-24
  • flag_zero_cosine1-24
  • down_short_hemisp
  • short_direct_normal
  • up_long_case_temp
  • lon
  • logger_temp
  • up_long_hemisp
  • down_long_dome_temp
  • direct_norm_broadband
more

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