SGP/NEPHELOMETER/C1 - Periodic bad backgrounds on filtered air.

The hourly background using filtered air started to go negative, indicating a possible 
valve problem, contaminate inside the scattering volume or electronic problem. Valves were 
checked and found to be be in good working order. Instrument was turned off and shipped 
back to mentor for repair. Wet neph was moved into dry neph position

Use data with caution

• Aerosol backwards-hemispheric light scattering coefficient, blue channel, 10um(Bbs_B_Dry_10um_Neph3W_1)
• Aerosol total light scattering coefficient, Ref. Humidograph nephelometer blue
  channel, 1 um particle diameter(Bs_B_Dry_1um_Neph3W_1)
• Pressure inside reference nephelometer(P_Neph_Dry)
• Temperature at reference nephelometer inlet(T_NephInlet_Dry)
• Aerosol total light scattering coefficient, ref. humidograph nephelometer green
  channel, 1 um particle diameter(Bs_G_Dry_1um_Neph3W_1)
• Aerosol total light scattering coefficient, red channel, 10 um particle size(Bs_R_Dry_10um_Neph3W_1)
• Aerosol backwards-hemispheric light scattering coefficient, reference
  nephelometer red channel, 1 um particle diameter(Bbs_R_Dry_1um_Neph3W_1)
• Aerosol backwards-hemispheric light scattering coefficient, red channel, 10um(Bbs_R_Dry_10um_Neph3W_1)
• Back-scattering coefficient, green wavelength, low RH, 10 um size cut(Bbs_G_Dry_10um_Neph3W_1)
• Aerosol backwards-hemispheric light scattering coefficient, green channel, 1 um
  size cut, reference three wavelength nephelometer(Bbs_G_Dry_1um_Neph3W_1)
• Aerosol total light scattering coefficient, reference nephelometer green
  channel, 10 um particle diameter(Bs_G_Dry_10um_Neph3W_1)
• Relative humidity, reference nephelometer inlet(RH_NephInlet_Dry)
• Aerosol backwards-hemispheric light scattering coefficient, blue channel, 1 um
  size cut, reference three wavelength nephelometer(Bbs_B_Dry_1um_Neph3W_1)
• Aerosol total light scattering coefficient, blue channel, 10 um size cut,
  reference three wavelength nephelometer(Bs_B_Dry_10um_Neph3W_1)
• Temperature inside reference nephelometer(T_NephVol_Dry)
• Relative humidity inside reference nephelometer inlet(RH_NephVol_Dry)
• Aerosol total light scattering coefficient, reference nephelometer red channel,
  1 um particle diameter(Bs_R_Dry_1um_Neph3W_1)

• Aerosol back-hemispheric light scattering coefficient, nominal red wavelength at
  dry or reference RH(Bbs_R_Dry_Neph3W_1)
• Sample temperature inside reference nephelometer(T_Neph_Dry)
• Relative humidity, reference nephelometer(RH_Neph_Dry)
• Impactor setting in terms of aerodynamic diameter cut off(impactor_setting)
• Aerosol total light scattering coefficient, nominal green wavelength at dry or
  reference RH(Bs_G_Dry_Neph3W_1)
• Aerosol back-hemispheric light scattering coefficient, nominal blue wavelength
  at dry or reference RH(Bbs_B_Dry_Neph3W_1)
• Aerosol total light scattering coefficient, nominal red wavelength at dry or
  reference RH(Bs_R_Dry_Neph3W_1)
• Pressure inside reference nephelometer(P_Neph_Dry)
• Aerosol total light scattering coefficient, nominal blue wavelength at dry or
  reference RH(Bs_B_Dry_Neph3W_1)
• Aerosol back-hemispheric light scattering coefficient, nominal green wavelength
  at dry or reference RH(Bbs_G_Dry_Neph3W_1)
• Temperature, reference nephelometer inlet(T_Neph_Inlet_Dry)