SGP/MWR/C1 - Increased noise in 31.4 GHz channel

The 31.4 GHz channel has been showing an increased level of noise which results in 
increased noise in the LWP retrievals. The instrument is tipping and all other parameters seem 
to be in the range. The elevate noise started in May, but it seems to have become slightly 
worse after summer. After November the noise level seems to have gone back to normal.

• 31.4 GHz sky brightness temperature derived from tip curve(tbsky31tip)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)

• Sky brightness temperature at 31.4 GHz(tbsky31)
• Averaged total liquid water along LOS path(liq)

SGP/AOS/C1 - Pump failure and subsequent failure of humidified nephelometer

The pump for the aerosol sampling system failed over a weekend. The humidifier continued 
to operate and soaked the inside of both the reference and wet nephelometers. The 
nephelometers were returned for repair. A replacement neph was installed on 2008-August 5 @1858 
UTC. The nephs were repaired and returned to SGP in December 2008. The humidification 
system was rebuilt and installed on 2009 January 6 at 1912 UTC.

• Aerosol light absorption coefficient, green channel, 10 um size cut(Ba_G_Dry_10um_PSAP1W_1)
• Absorption Coefficient Red, corrected for flow and sample area, 3 wavelength
  PSAP, 10 um size cut(Ba_R_Dry_10um_PSAP3W_1)
• Absorption Coefficient Green, corrected for flow and sample area, 3 wavelength
  PSAP, 10 um size cut(Ba_G_Dry_10um_PSAP3W_1)
• Aerosol backwards-hemispheric light scattering coefficient, green channel, 10 um
  size cut, reference three wavelength nephelometer(Bbs_G_Dry_10um_Neph3W_1)
• Aerosol backwards-hemispheric light scattering coefficient, red channel, 1 um
  size cut, wet three wavelength nephelometer(Bbs_R_Wet_1um_Neph3W_2)
• Absorption Coefficient Red, corrected for flow and sample area, 3 wavelength
  PSAP, 1 um size cut(Ba_R_Dry_1um_PSAP3W_1)
• Aerosol backwards-hemispheric light scattering coefficient, green channel, 1 um
  size cut, wet three wavelength nephelometer(Bbs_G_Wet_1um_Neph3W_2)
• Aerosol total light scattering coefficient, blue channel, 1 um size cut, wet
  three wavelength nephelometer(Bs_B_Wet_1um_Neph3W_2)
• Aerosol total light scattering coefficient, green channel, 10 um size cut, wet
  three wavelength nephelometer(Bs_G_Wet_10um_Neph3W_2)
• Aerosol backwards-hemispheric light scattering coefficient, red channel, 10 um
  size cut, wet three wavelength nephelometer(Bbs_R_Wet_10um_Neph3W_2)
• Aerosol total light scattering coefficient, green channel, 1 um size cut, wet
  three wavelength nephelometer(Bs_G_Wet_1um_Neph3W_2)
• Aerosol total light scattering coefficient, red channel, 1 um size cut, wet
  three wavelength nephelometer(Bs_R_Wet_1um_Neph3W_2)
• Relative humidity of humidograph preheater(RH_preHG)
• Aerosol total light scattering coefficient, red channel, 1 um size cut,
  reference three wavelength nephelometer(Bs_R_Dry_1um_Neph3W_1)
• Temperature of humidograph controller(T_postHG)
• Aerosol total light scattering coefficient, red channel, 10 um size cut, wet
  three wavelength nephelometer(Bs_R_Wet_10um_Neph3W_2)
• Temperature at wet nephelometer inlet(T_NephInlet_Wet)
• Relative humidity of humidograph controller(RH_postHG)
• 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, green channel, 1 um size cut,
  reference three wavelength nephelometer(Bs_G_Dry_1um_Neph3W_1)
• Relative humidity at wet nephelometer inlet(RH_NephInlet_Wet)
• Temperature at reference nephelometer inlet(T_NephInlet_Dry)
• Aerosol backwards-hemispheric light scattering coefficient, blue channel, 10 um
  size cut, wet three wavelength nephelometer(Bbs_B_Wet_10um_Neph3W_2)
• Absorption Coefficient Green, corrected for flow and sample area, 3 wavelength
  PSAP, 1 um size cut(Ba_G_Dry_1um_PSAP3W_1)
• Aerosol backwards-hemispheric light scattering coefficient, blue channel, 10 um
  size cut, reference three wavelength nephelometer(Bbs_B_Dry_10um_Neph3W_1)
• Aerosol backwards-hemispheric light scattering coefficient, blue channel, 1 um
  size cut, reference three wavelength nephelometer(Bbs_B_Dry_1um_Neph3W_1)
• Relative humidity at reference nephelometer inlet(RH_NephInlet_Dry)
• Absorption Coefficient Blue, corrected for flow and sample area, 3 wavelength
  PSAP, 10 um size cut(Ba_B_Dry_10um_PSAP3W_1)
• Aerosol total light scattering coefficient, green channel, 10 um size cut,
  reference three wavelength nephelometer(Bs_G_Dry_10um_Neph3W_1)
• Temperature of humidograph preheater(T_preHG)
• Aerosol total light scattering coefficient, blue channel, 10 um size cut, wet
  three wavelength nephelometer(Bs_B_Wet_10um_Neph3W_2)
• Aerosol backwards-hemispheric light scattering coefficient, blue channel, 1 um
  size cut, wet three wavelength nephelometer(Bbs_B_Wet_1um_Neph3W_2)
• Aerosol light absorption coefficient, green channel, 1 um size cut(Ba_G_Dry_1um_PSAP1W_1)
• Aerosol total light scattering coefficient, blue channel, 1 um size cut,
  reference three wavelength nephelometer(Bs_B_Dry_1um_Neph3W_1)
• Aerosol backwards-hemispheric light scattering coefficient, red channel, 10 um
  size cut, reference three wavelength nephelometer(Bbs_R_Dry_10um_Neph3W_1)
• Aerosol backwards-hemispheric light scattering coefficient, green channel, 10 um
  size cut, wet three wavelength nephelometer(Bbs_G_Wet_10um_Neph3W_2)
• Aerosol total light scattering coefficient, red channel, 10 um size cut,
  reference three wavelength nephelometer(Bs_R_Dry_10um_Neph3W_1)
• Aerosol total light scattering coefficient, blue channel, 10 um size cut,
  reference three wavelength nephelometer(Bs_B_Dry_10um_Neph3W_1)
• Aerosol backwards-hemispheric light scattering coefficient, red channel, 1 um
  size cut, reference three wavelength nephelometer(Bbs_R_Dry_1um_Neph3W_1)
• Absorption Coefficient Blue, corrected for flow and sample area, 3 wavelength
  PSAP, 1 um size cut(Ba_B_Dry_1um_PSAP3W_1)