DQRID : D980731.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
07/10/1998043507/28/19982053Suspect
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Subject:
SGP/AOS/C1 - Aerosol sampling system and nephelometer failure
DataStreams:sgpaosC1.a0, sgpaosauxC1.a0
Description:
The electronic valve that switches the aerosol sampling system from sampling the total 
aerosol (D<10 um) to the submicrometer (D<1 um) aerosol began having intermittent 
positioning problems.  All 3-wavelength nephelometer and light absorption photometer data collected 
during this time period should be viewed as suspect, since we can't be sure what 
particle size range was being sampled at any time.  During this interval, the nephelometer lamp 
became unstable and finally blew, giving no nephelometer data for the end of this period. 
 The period of lamp failure in the AOS data files can be recognized by prolonged periods 
of missing value codes for aerosol scattering and nephelometer housekeeping channels.
Suggestions: 
Measurements:sgpaosauxC1.a0:
  • BluBScatZero_HRH
  • GrnRScatZero_LRH
  • TSINephLV_LRH
  • BluBScatZero_LRH
  • GrnRScatZero_HRH
  • TSINephLV_HRH
  • GrnTScatZero_LRH
  • BluTScatSpn_HRH
  • GrnTScatZero_HRH
  • RedBScatSpn_LRH
  • RedTScatZero_HRH
  • TSINephLC_HRH
  • RedBScatSpn_HRH
  • RedTScatZero_LRH
  • TSINephLC_LRH
  • BapRef
  • BluRScatZero_HRH
  • GrnTScatSpn_LRH
  • GrnBScatSpn_HRH
  • BapSignal
  • BluRScatZero_LRH
  • BluBScatSpn_LRH
  • GrnBScatSpn_LRH
  • GrnTScatSpn_HRH
  • RedRScatZero_LRH
  • BapFiltr
  • RedRScatZero_HRH
  • BapFlow
  • BluBScatSpn_HRH
  • TSISensGrn_HRH
  • TSISensGrn_LRH
  • RedTScatSpn_HRH
  • RedBScatZero_LRH
  • RedTScatSpn_LRH
  • RedBScatZero_HRH
  • BluTScatZero_HRH
  • BluTScatZero_LRH
  • GrnBScatZero_LRH
  • GrnBScatZero_HRH
  • BluTScatSpn_LRH
more
sgpaosC1.a0:
  • TSINephRHSamp_HRH
  • GrnBScatCoef_1um_LRH
  • TSINephTin_HRH
  • GrnTScatCoef_10um_LRH
  • TSINephRHSamp_LRH
  • RedBScatCoef_1um_LRH
  • RedTScatCoef_10um_LRH
  • RedBScatCoef_10um_HRH
  • RedBScatCoef_1um_HRH
  • TSINephTin_LRH
  • Bap_I_1um
  • TSINephTSamp_LRH
  • GrnBScatCoef_10um_LRH
  • TSINephTSamp_HRH
  • GrnBScatCoef_10um_HRH
  • RedTScatCoef_10um_HRH
  • GrnBScatCoef_1um_HRH
  • BluBScatCoef_1um_LRH
  • BluBScatCoef_1um_HRH
  • Bap_I_10um
  • RH530nm
  • BluTScatCoef_1um_HRH
  • BluTScatCoef_1um_LRH
  • TSINephPres_HRH
  • TSINephPres_LRH
  • Pres530nm
  • Neph530Temp
  • GrnTScatCoef_1um_LRH
  • BluTScatCoef_10um_HRH
  • GrnTScatCoef_1um_HRH
  • RedTScatCoef_1um_LRH
  • RedTScatCoef_1um_HRH
  • BluTScatCoef_10um_LRH
  • RedBScatCoef_10um_LRH
  • GrnTScatCoef_10um_HRH
  • BluBScatCoef_10um_LRH
  • BluBScatCoef_10um_HRH
more

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