DQRID : D980731.1
Start DateStart TimeEnd DateEnd Time
07/10/1998043507/28/19982053
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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:  
  • TSI High RH Neph. 450 nm back scattering coefficient for zero gas(BluBScatZero_HRH)
  • TSI Low RH Neph. 550 nm rayleigh scattering coefficient for zero gas(GrnRScatZero_LRH)
  • TSI Low RH Neph. lamp voltage(TSINephLV_LRH)
  • TSI Low RH Neph. 450 nm back scattering coefficient for zero gas(BluBScatZero_LRH)
  • TSI High RH Neph. 550 nm rayleigh scattering coefficient for zero gas(GrnRScatZero_HRH)
  • TSI High RH Neph. lamp voltage(TSINephLV_HRH)
  • TSI Low RH Neph. 550 nm total scattering coefficient for zero gas(GrnTScatZero_LRH)
  • TSI High RH Neph. 450 nm total scattering coefficient for cal. gas(BluTScatSpn_HRH)
  • TSI High RH Neph. 550 nm total scattering coefficient for zero gas(GrnTScatZero_HRH)
  • TSI Low RH Neph. 700 nm back scattering coefficient for cal. gas(RedBScatSpn_LRH)
  • TSI High RH Neph. 700 nm total scattering coefficient for zero gas(RedTScatZero_HRH)
  • TSI High RH Neph. lamp current(TSINephLC_HRH)
  • TSI High RH Neph. 700 nm back scattering coefficient for cal. gas(RedBScatSpn_HRH)
  • TSI Low RH Neph. 700 nm total scattering coefficient for zero gas(RedTScatZero_LRH)
  • TSI Low RH Neph. lamp current(TSINephLC_LRH)
  • CLAP reference signal(BapRef)
  • TSI High RH Neph. 450 nm rayleigh scattering coefficient for zero gas(BluRScatZero_HRH)
  • TSI Low RH Neph. 550 nm total scattering coefficient for cal. gas(GrnTScatSpn_LRH)
  • TSI High RH Neph. 550 nm back scattering coefficient for cal. gas(GrnBScatSpn_HRH)
  • CLAP Signal(BapSignal)
  • TSI Low RH Neph. 450 nm rayleigh scattering coefficient for zero gas(BluRScatZero_LRH)
  • TSI Low RH Neph. 450 nm back scattering coefficient for cal. gas(BluBScatSpn_LRH)
  • TSI Low RH Neph. 550 nm back scattering coefficient for cal. gas(GrnBScatSpn_LRH)
  • TSI High RH Neph. 550 nm total scattering coefficient for cal. gas(GrnTScatSpn_HRH)
  • TSI Low RH Neph. 700 nm rayleigh scattering coefficient for zero gas(RedRScatZero_LRH)
  • Transmittance through CLAP filter(BapFiltr)
  • TSI High RH Neph. 700 nm rayleigh scattering coefficient for zero gas(RedRScatZero_HRH)
  • CLAP flow(BapFlow)
  • TSI High RH Neph. 450 nm back scattering coefficient for cal. gas(BluBScatSpn_HRH)
  • TSI High RH Neph. 550nm reference intensity(TSISensGrn_HRH)
  • TSI Low RH Neph. 550nm reference intensity(TSISensGrn_LRH)
  • TSI High RH Neph. 700 nm total scattering coefficient for cal. gas(RedTScatSpn_HRH)
  • TSI Low RH Neph. 700 nm back scattering coefficient for zero gas(RedBScatZero_LRH)
  • TSI Low RH Neph. 700 nm total scattering coefficient for cal. gas(RedTScatSpn_LRH)
  • TSI High RH Neph. 700 nm back scattering coefficient for zero gas(RedBScatZero_HRH)
  • TSI High RH Neph. 450 nm total scattering coefficient for zero gas(BluTScatZero_HRH)
  • TSI Low RH Neph. 450 nm total scattering coefficient for zero gas(BluTScatZero_LRH)
  • TSI Low RH Neph. 550 nm back scattering coefficient for zero gas(GrnBScatZero_LRH)
  • TSI High RH Neph. 550 nm back scattering coefficient for zero gas(GrnBScatZero_HRH)
  • TSI Low RH Neph. 450 nm total scattering coefficient for cal. gas(BluTScatSpn_LRH)
more

sgpaosC1.a0:  
  • TSI High RH Neph. relative humidity(TSINephRHSamp_HRH)
  • TSI Low RH Neph. 550 nm backscat. coef. at 1 um(GrnBScatCoef_1um_LRH)
  • TSI High RH Neph. inlet temperature(TSINephTin_HRH)
  • TSI Low RH Neph. 550 nm total scat. coef. at 10 um(GrnTScatCoef_10um_LRH)
  • TSI Low RH Neph. relative humidity(TSINephRHSamp_LRH)
  • TSI Low RH Neph. 700 nm backscat. coef. at 1 um(RedBScatCoef_1um_LRH)
  • TSI Low RH Neph. 700 nm total scat. coef. at 10 um(RedTScatCoef_10um_LRH)
  • TSI High RH Neph. 700 nm backscat. coef. at 10 um(RedBScatCoef_10um_HRH)
  • TSI High RH Neph. 700 nm backscat. coef. at 1 um(RedBScatCoef_1um_HRH)
  • TSI Low RH Neph. inlet temperature(TSINephTin_LRH)
  • 1 um Absorption coefficient(Bap_I_1um)
  • TSI Low RH Neph. Sample Temperature(TSINephTSamp_LRH)
  • TSI Low RH Neph. 550 nm backscat. coef. at 10 um(GrnBScatCoef_10um_LRH)
  • TSI High RH Neph. Sample Temperature(TSINephTSamp_HRH)
  • TSI High RH Neph. 550 nm backscat. coef. at 10 um(GrnBScatCoef_10um_HRH)
  • TSI High RH Neph. 700 nm total scat. coef. at 10 um(RedTScatCoef_10um_HRH)
  • TSI High RH Neph. 550 nm backscat. coef. at 1 um(GrnBScatCoef_1um_HRH)
  • TSI Low RH Neph. 450 nm backscat. coef. at 1 um(BluBScatCoef_1um_LRH)
  • TSI High RH Neph. 450 nm backscat. coef. at 1 um(BluBScatCoef_1um_HRH)
  • 10 um Absorption coefficient(Bap_I_10um)
  • Single wave Neph. RH(RH530nm)
  • TSI High RH Neph. 450 nm total scat. coef. at 1 um(BluTScatCoef_1um_HRH)
  • TSI Low RH Neph. 450 nm total scat. coef. at 1 um(BluTScatCoef_1um_LRH)
  • TSI High RH Neph. Pressure(TSINephPres_HRH)
  • TSI Low RH Neph. Pressure(TSINephPres_LRH)
  • Single wave Neph. pressure(Pres530nm)
  • Radiance neph. temperature(Neph530Temp)
  • TSI Low RH Neph. 550 nm total scat. coef. at 1 um(GrnTScatCoef_1um_LRH)
  • TSI High RH Neph. 450 nm total scat. coef. at 10 um(BluTScatCoef_10um_HRH)
  • TSI High RH Neph. 550 nm total scat. coef. at 1 um(GrnTScatCoef_1um_HRH)
  • TSI Low RH Neph. 700 nm total scat. coef. at 1 um(RedTScatCoef_1um_LRH)
  • TSI High RH Neph. 700 nm total scat. coef. at 1 um(RedTScatCoef_1um_HRH)
  • TSI Low RH Neph. 450 nm total scat. coef. at 10 um(BluTScatCoef_10um_LRH)
  • TSI Low RH Neph. 700 nm backscat. coef. at 10 um(RedBScatCoef_10um_LRH)
  • TSI High RH Neph. 550 nm total scat. coef. at 10 um(GrnTScatCoef_10um_HRH)
  • TSI Low RH Neph. 450 nm backscat. coef. at 10 um(BluBScatCoef_10um_LRH)
  • TSI High RH Neph. 450 nm backscat. coef. at 10 um(BluBScatCoef_10um_HRH)
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