DQRID : D150121.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
03/22/2011000008/19/20142359Suspect
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Subject:
MAO/PGH/PVC/SGP/SASHE/C1 - Reprocess: Stray light contamination at extreme wavelengths
DataStreams:sgpsashemfrC1.b1, sgpsashevislowsunC1.a0, sgpsashevisC1.b1, pvcsashenirhisunM1.a0,
pghsashevislowsunM1.a0, pvcsashemfrM1.b1, maosashevisM1.b1, sgpsashevishisunC1.a0,
pvcsashevislowsunM1.a0, maosashevislowsunM1.a0, pvcsashevisM1.b1, maosashenirM1.b1,
sgpsashenirlowsunC1.a0, sgpsashenirhisunC1.a0, pghsashenirlowsunM1.a0, pvcsashenirM1.b1,
pghsashevishisunM1.a0, pghsashenirhisunM1.a0, maosashevishisunM1.a0, sgpsashenirC1.b1,
maosashenirlowsunM1.a0, maosashenirhisunM1.a0, pvcsashenirlowsunM1.a0, pvcsashevishisunM1.a0
Description:
The irradiance measurements at near the limits of the spectrometer wavelength ranges are 
subject to contamination from stray light within the spectrometer itself. This affects not 
only the basic measurement, but also can affect the calibration such that reported 
values may be either higher or lower than actual. Typically, this yields a high bias for 
measurements at the low wavelength limit and a low bias at the high wavelength limit. This 
causes opposite effects for AOD with a low bias at low wavelength and a high bias for high 
wavelengths.
Suggestions: 
Avoid using the irradiance, atmospheric transmittance, and optical depth data below 

450 nm and above 940 nm for the VIS spectrometer and below 1000 nm or above 1600 nm for 
the NIR spectrometer.
Measurements:pghsashevishisunM1.a0:
  • spectra
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pghsashevislowsunM1.a0:
  • spectra
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sgpsashemfrC1.b1:
  • direct_horizontal_615nm
  • total_hemisp_940nm
  • direct_normal_615nm
  • total_hemisp_415nm
  • direct_normal_415nm
  • diffuse_hemisp_415nm
  • direct_horizontal_500nm
  • direct_horizontal_415nm
  • direct_normal_673nm
  • total_hemisp_615nm
  • diffuse_hemisp_673nm
  • direct_normal_500nm
  • diffuse_hemisp_500nm
  • diffuse_hemisp_870nm
  • total_hemisp_500nm
  • total_hemisp_870nm
  • direct_horizontal_673nm
  • direct_horizontal_940nm
  • direct_normal_870nm
  • diffuse_hemisp_940nm
  • direct_normal_940nm
  • diffuse_hemisp_615nm
  • direct_horizontal_870nm
  • total_hemisp_673nm
more
sgpsashevisC1.b1:
  • direct_normal_spectrometer_vis
  • total_hemisp_spectrometer_vis
  • diffuse_hemisp_spectrometer_vis
  • direct_horizontal_spectrometer_vis
more
sgpsashenirlowsunC1.a0:
  • spectra
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pvcsashenirM1.b1:
  • diffuse_hemisp_spectrometer_nir
  • direct_normal_spectrometer_nir
  • total_hemisp_spectrometer_nir
  • direct_horizontal_spectrometer_nir
more
sgpsashenirhisunC1.a0:
  • spectra
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maosashenirlowsunM1.a0:
  • spectra
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pvcsashenirhisunM1.a0:
  • spectra
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pvcsashemfrM1.b1:
  • direct_normal_415nm
  • total_hemisp_500nm
  • diffuse_hemisp_500nm
  • direct_horizontal_615nm
  • direct_normal_615nm
  • direct_normal_940nm
  • direct_horizontal_870nm
  • diffuse_hemisp_615nm
  • direct_horizontal_940nm
  • diffuse_hemisp_870nm
  • total_hemisp_415nm
  • diffuse_hemisp_940nm
  • direct_horizontal_673nm
  • diffuse_hemisp_415nm
  • direct_normal_870nm
  • total_hemisp_940nm
  • direct_normal_500nm
  • total_hemisp_673nm
  • diffuse_hemisp_673nm
  • direct_horizontal_415nm
  • direct_normal_673nm
  • total_hemisp_615nm
  • direct_horizontal_500nm
  • total_hemisp_870nm
more
maosashenirhisunM1.a0:
  • spectra
more
pghsashenirlowsunM1.a0:
  • spectra
more
sgpsashenirC1.b1:
  • diffuse_hemisp_spectrometer_nir
  • direct_horizontal_spectrometer_nir
  • total_hemisp_spectrometer_nir
  • direct_normal_spectrometer_nir
more
pvcsashevishisunM1.a0:
  • spectra
more
sgpsashevishisunC1.a0:
  • spectra
more
maosashevisM1.b1:
  • direct_horizontal_spectrometer_vis
  • diffuse_hemisp_spectrometer_vis
  • total_hemisp_spectrometer_vis
  • direct_normal_spectrometer_vis
more
pvcsashenirlowsunM1.a0:
  • spectra
more
maosashevishisunM1.a0:
  • spectra
more
pghsashenirhisunM1.a0:
  • spectra
more
maosashenirM1.b1:
  • direct_normal_spectrometer_nir
  • total_hemisp_spectrometer_nir
  • diffuse_hemisp_spectrometer_nir
  • direct_horizontal_spectrometer_nir
more
pvcsashevislowsunM1.a0:
  • spectra
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sgpsashevislowsunC1.a0:
  • spectra
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maosashevislowsunM1.a0:
  • spectra
more
pvcsashevisM1.b1:
  • integration_time_spectrometer_vis
  • direct_horizontal_spectrometer_vis
  • direct_normal_spectrometer_vis
  • diffuse_hemisp_spectrometer_vis
more

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