NIM/AOS/M1 - Mass flow controller failure

The mass flow controller stopped working. A replacement one was installed at the site.

• AOS CCN temperature of the optical particle counter(CCN_T_OPC)
• AOS bin number of lowest channel of OPC include in summation of N_CCN(N_CCN_bin_number)
• AOS CCN temperature at top of column(CCN_T_TEC1)
• AOS CCN volumetric flowrate of sheath air(CCN_Q_sheath)
• AOS CCN temperature of the nafion humidifier(CCN_T_nafion)
• AOS CCN volumetric flowrate of sample air(CCN_Q_sample)
• AOS CCN OPC laser current(CCN_laser_current)
• AOS CCN sample saturation setpoint value reported by instrument(CCN_ss_set)
• AOS CCN temperature of sample air entering the column(CCN_T_sample)
• AOS CCN number concentration by bin(N_CCN_dN)
• AOS CCN sample supersaturation calculated by model)(CCN_ss_calc)
• AOS CCN standard deviation of difference (CCN_T_TEC1 - CCN_T_TEC3)(CCN_dT_TEC3_TEC1_StdDev)
• Hexadecimal flag, non-zero value means instrument is not operating stably(CCN_temp_unstable_flag)
• AOS CCN temperature at middle of column(CCN_T_TEC2)
• Size of upper limit of each CCN bin(CCN_UpperSizeLimit)
• AOS CCN sample pressure(CCN_P_sample)
• AOS CCN temperature of sample air at entrance to instrument(CCN_T_inlet)
• AOS CCN temperature at bottom of column(CCN_T_TEC3)
• AOS number concentration of CCN(N_CCN)

• AOS CLAP or PSAP3W transmittance, green channel(TrG)
• AOS PSAP3W transmittance, red channel(TrR)
• AOS PSAP3W transmittance, blue channel(TrB)

• Temperature of humidograph preheater(T_preHG)
• Relative humidity at wet nephelometer inlet(RH_NephInlet_Wet)
• 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, green channel, 10 um
  size cut, reference three wavelength nephelometer(Bbs_G_Dry_10um_Neph3W_1)
• Aerosol backwards-hemispheric light scattering coefficient, red channel, 10 um
  size cut, reference three wavelength nephelometer(Bbs_R_Dry_10um_Neph3W_1)
• Wind direction(WindDirection)
• Aerosol light absorption coefficient, green channel, 1 um size cut(Ba_G_Dry_1um_PSAP1W_1)
• Relative humidity inside reference nephelometer inlet(RH_NephVol_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 Blue, corrected for flow and sample area, 3 wavelength
  PSAP, 1 um size cut(Ba_B_Dry_1um_PSAP3W_1)
• Absorption Coefficient Green, corrected for flow and sample area, 3 wavelength
  PSAP, 1 um size cut(Ba_G_Dry_1um_PSAP3W_1)
• Relative humidity of humidograph preheater(RH_preHG)
• Absorption Coefficient Blue, corrected for flow and sample area, 3 wavelength
  PSAP, 10 um size cut(Ba_B_Dry_10um_PSAP3W_1)
• Relative humidity inside wet nephelometer inlet(RH_NephVol_Wet)
• Aerosol total light scattering coefficient, blue channel, 1 um size cut, wet
  three wavelength nephelometer(Bs_B_Wet_1um_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 total light scattering coefficient, green channel, 10 um size cut, wet
  three wavelength nephelometer(Bs_G_Wet_10um_Neph3W_2)
• Condensation Nuclei Concentration Number(N_CPC_1)
• Temperature at inlet(T_MainInlet)
• Aerosol backwards-hemispheric light scattering coefficient, blue channel, 1 um
  size cut, reference three wavelength nephelometer(Bbs_B_Dry_1um_Neph3W_1)
• Temperature at reference nephelometer inlet(T_NephInlet_Dry)
• Particle Concentration Number from summation of Optical Particle Counter size
  bins(N_OPC_1)
• Aerosol total light scattering coefficient, blue channel, 10 um size cut,
  reference three wavelength nephelometer(Bs_B_Dry_10um_Neph3W_1)
• Relative humidity at inlet(RH_MainInlet)
• Relative humidity in ambient air(RH_Ambient)
• Aerosol total light scattering coefficient, green channel, 1 um size cut, wet
  three wavelength nephelometer(Bs_G_Wet_1um_Neph3W_2)
• IAP system status(flags_NOAA)
• Aerosol total light scattering coefficient, red channel, 1 um size cut,
  reference three wavelength nephelometer(Bs_R_Dry_1um_Neph3W_1)
• Aerosol backwards-hemispheric light scattering coefficient, green channel, 1 um
  size cut, wet three wavelength nephelometer(Bbs_G_Wet_1um_Neph3W_2)
• Temperature at wet nephelometer inlet(T_NephInlet_Wet)
• Aerosol total light scattering coefficient, red channel, 10 um size cut, wet
  three wavelength nephelometer(Bs_R_Wet_10um_Neph3W_2)
• Aerosol total light scattering coefficient, green channel, 10 um size cut,
  reference three wavelength nephelometer(Bs_G_Dry_10um_Neph3W_1)
• Aerosol total light scattering coefficient, blue channel, 10 um size cut, wet
  three wavelength nephelometer(Bs_B_Wet_10um_Neph3W_2)
• Temperature of humidograph controller(T_postHG)
• Aerosol backwards-hemispheric light scattering coefficient, red channel, 1 um
  size cut, reference three wavelength nephelometer(Bbs_R_Dry_1um_Neph3W_1)
• Pressure inside wet nephelometer(P_Neph_Wet)
• Aerosol backwards-hemispheric light scattering coefficient, red channel, 10 um
  size cut, wet three wavelength nephelometer(Bbs_R_Wet_10um_Neph3W_2)
• Aerosol backwards-hemispheric light scattering coefficient, green channel, 10 um
  size cut, wet three wavelength nephelometer(Bbs_G_Wet_10um_Neph3W_2)
• Temperature inside wet nephelometer inlet(T_NephVol_Wet)
• Aerosol backwards-hemispheric light scattering coefficient, green channel, 1 um
  size cut, reference three wavelength nephelometer(Bbs_G_Dry_1um_Neph3W_1)
• Absorption Coefficient Green, corrected for flow and sample area, 3 wavelength
  PSAP, 10 um size cut(Ba_G_Dry_10um_PSAP3W_1)
• Temperature of ambient air(T_Ambient)
• Wind speed(WindSpeed)
• Aerosol total light scattering coefficient, red channel, 1 um size cut, wet
  three wavelength nephelometer(Bs_R_Wet_1um_Neph3W_2)
• Pressure inside reference nephelometer(P_Neph_Dry)
• Relative humidity at reference nephelometer inlet(RH_NephInlet_Dry)
• Aerosol light absorption coefficient, green channel, 10 um size cut(Ba_G_Dry_10um_PSAP1W_1)
• Aerosol total light scattering coefficient, red channel, 10 um size cut,
  reference three wavelength nephelometer(Bs_R_Dry_10um_Neph3W_1)
• Relative humidity of humidograph controller(RH_postHG)
• Aerosol backwards-hemispheric light scattering coefficient, red channel, 1 um
  size cut, wet three wavelength nephelometer(Bbs_R_Wet_1um_Neph3W_2)
• Temperature inside reference nephelometer inlet(T_NephVol_Dry)
• 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, blue channel, 10 um
  size cut, reference three wavelength nephelometer(Bbs_B_Dry_10um_Neph3W_1)
• Absorption Coefficient Red, corrected for flow and sample area, 3 wavelength
  PSAP, 10 um size cut(Ba_R_Dry_10um_PSAP3W_1)
• Aerosol total light scattering coefficient, green channel, 1 um size cut,
  reference three wavelength nephelometer(Bs_G_Dry_1um_Neph3W_1)
• Pressure of ambient air(P_Ambient)

NIM/AOS/M1 - Bypass valve failure

The flow bypass valve failed which routed flow through the bypass line rather than through 
the instruments. The bypass line was capped the next day. The valve was replaced on 
4/19. Data is considered unusable during the time between the valve failure on 3/22 and the 
capping of the flow line on 3/23.

• AOS CCN temperature of the optical particle counter(CCN_T_OPC)
• AOS bin number of lowest channel of OPC include in summation of N_CCN(N_CCN_bin_number)
• AOS CCN temperature at top of column(CCN_T_TEC1)
• AOS CCN volumetric flowrate of sheath air(CCN_Q_sheath)
• AOS CCN temperature of the nafion humidifier(CCN_T_nafion)
• AOS CCN volumetric flowrate of sample air(CCN_Q_sample)
• AOS CCN OPC laser current(CCN_laser_current)
• AOS CCN sample saturation setpoint value reported by instrument(CCN_ss_set)
• AOS CCN temperature of sample air entering the column(CCN_T_sample)
• AOS CCN number concentration by bin(N_CCN_dN)
• AOS CCN sample supersaturation calculated by model)(CCN_ss_calc)
• AOS CCN standard deviation of difference (CCN_T_TEC1 - CCN_T_TEC3)(CCN_dT_TEC3_TEC1_StdDev)
• Hexadecimal flag, non-zero value means instrument is not operating stably(CCN_temp_unstable_flag)
• AOS CCN temperature at middle of column(CCN_T_TEC2)
• Size of upper limit of each CCN bin(CCN_UpperSizeLimit)
• AOS CCN sample pressure(CCN_P_sample)
• AOS CCN temperature of sample air at entrance to instrument(CCN_T_inlet)
• AOS CCN temperature at bottom of column(CCN_T_TEC3)
• AOS number concentration of CCN(N_CCN)

• AOS CLAP or PSAP3W transmittance, green channel(TrG)
• AOS PSAP3W transmittance, red channel(TrR)
• AOS PSAP3W transmittance, blue channel(TrB)

• Temperature of humidograph preheater(T_preHG)
• Relative humidity at wet nephelometer inlet(RH_NephInlet_Wet)
• 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, green channel, 10 um
  size cut, reference three wavelength nephelometer(Bbs_G_Dry_10um_Neph3W_1)
• Aerosol backwards-hemispheric light scattering coefficient, red channel, 10 um
  size cut, reference three wavelength nephelometer(Bbs_R_Dry_10um_Neph3W_1)
• Wind direction(WindDirection)
• Aerosol light absorption coefficient, green channel, 1 um size cut(Ba_G_Dry_1um_PSAP1W_1)
• Relative humidity inside reference nephelometer inlet(RH_NephVol_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 Blue, corrected for flow and sample area, 3 wavelength
  PSAP, 1 um size cut(Ba_B_Dry_1um_PSAP3W_1)
• Absorption Coefficient Green, corrected for flow and sample area, 3 wavelength
  PSAP, 1 um size cut(Ba_G_Dry_1um_PSAP3W_1)
• Relative humidity of humidograph preheater(RH_preHG)
• Absorption Coefficient Blue, corrected for flow and sample area, 3 wavelength
  PSAP, 10 um size cut(Ba_B_Dry_10um_PSAP3W_1)
• Relative humidity inside wet nephelometer inlet(RH_NephVol_Wet)
• Aerosol total light scattering coefficient, blue channel, 1 um size cut, wet
  three wavelength nephelometer(Bs_B_Wet_1um_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 total light scattering coefficient, green channel, 10 um size cut, wet
  three wavelength nephelometer(Bs_G_Wet_10um_Neph3W_2)
• Condensation Nuclei Concentration Number(N_CPC_1)
• Temperature at inlet(T_MainInlet)
• Aerosol backwards-hemispheric light scattering coefficient, blue channel, 1 um
  size cut, reference three wavelength nephelometer(Bbs_B_Dry_1um_Neph3W_1)
• Temperature at reference nephelometer inlet(T_NephInlet_Dry)
• Particle Concentration Number from summation of Optical Particle Counter size
  bins(N_OPC_1)
• Aerosol total light scattering coefficient, blue channel, 10 um size cut,
  reference three wavelength nephelometer(Bs_B_Dry_10um_Neph3W_1)
• Relative humidity at inlet(RH_MainInlet)
• Relative humidity in ambient air(RH_Ambient)
• Aerosol total light scattering coefficient, green channel, 1 um size cut, wet
  three wavelength nephelometer(Bs_G_Wet_1um_Neph3W_2)
• IAP system status(flags_NOAA)
• Aerosol total light scattering coefficient, red channel, 1 um size cut,
  reference three wavelength nephelometer(Bs_R_Dry_1um_Neph3W_1)
• Aerosol backwards-hemispheric light scattering coefficient, green channel, 1 um
  size cut, wet three wavelength nephelometer(Bbs_G_Wet_1um_Neph3W_2)
• Temperature at wet nephelometer inlet(T_NephInlet_Wet)
• Aerosol total light scattering coefficient, red channel, 10 um size cut, wet
  three wavelength nephelometer(Bs_R_Wet_10um_Neph3W_2)
• Aerosol total light scattering coefficient, green channel, 10 um size cut,
  reference three wavelength nephelometer(Bs_G_Dry_10um_Neph3W_1)
• Aerosol total light scattering coefficient, blue channel, 10 um size cut, wet
  three wavelength nephelometer(Bs_B_Wet_10um_Neph3W_2)
• Temperature of humidograph controller(T_postHG)
• Aerosol backwards-hemispheric light scattering coefficient, red channel, 1 um
  size cut, reference three wavelength nephelometer(Bbs_R_Dry_1um_Neph3W_1)
• Pressure inside wet nephelometer(P_Neph_Wet)
• Aerosol backwards-hemispheric light scattering coefficient, red channel, 10 um
  size cut, wet three wavelength nephelometer(Bbs_R_Wet_10um_Neph3W_2)
• Aerosol backwards-hemispheric light scattering coefficient, green channel, 10 um
  size cut, wet three wavelength nephelometer(Bbs_G_Wet_10um_Neph3W_2)
• Temperature inside wet nephelometer inlet(T_NephVol_Wet)
• Aerosol backwards-hemispheric light scattering coefficient, green channel, 1 um
  size cut, reference three wavelength nephelometer(Bbs_G_Dry_1um_Neph3W_1)
• Absorption Coefficient Green, corrected for flow and sample area, 3 wavelength
  PSAP, 10 um size cut(Ba_G_Dry_10um_PSAP3W_1)
• Temperature of ambient air(T_Ambient)
• Wind speed(WindSpeed)
• Aerosol total light scattering coefficient, red channel, 1 um size cut, wet
  three wavelength nephelometer(Bs_R_Wet_1um_Neph3W_2)
• Pressure inside reference nephelometer(P_Neph_Dry)
• Relative humidity at reference nephelometer inlet(RH_NephInlet_Dry)
• Aerosol light absorption coefficient, green channel, 10 um size cut(Ba_G_Dry_10um_PSAP1W_1)
• Aerosol total light scattering coefficient, red channel, 10 um size cut,
  reference three wavelength nephelometer(Bs_R_Dry_10um_Neph3W_1)
• Relative humidity of humidograph controller(RH_postHG)
• Aerosol backwards-hemispheric light scattering coefficient, red channel, 1 um
  size cut, wet three wavelength nephelometer(Bbs_R_Wet_1um_Neph3W_2)
• Temperature inside reference nephelometer inlet(T_NephVol_Dry)
• 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, blue channel, 10 um
  size cut, reference three wavelength nephelometer(Bbs_B_Dry_10um_Neph3W_1)
• Absorption Coefficient Red, corrected for flow and sample area, 3 wavelength
  PSAP, 10 um size cut(Ba_R_Dry_10um_PSAP3W_1)
• Aerosol total light scattering coefficient, green channel, 1 um size cut,
  reference three wavelength nephelometer(Bs_G_Dry_1um_Neph3W_1)
• Pressure of ambient air(P_Ambient)

NIM/AOS/M1 - Flow controller failure

Following a power outage at the site both a PID controller for the main sample flow as 
well as a circuit board on the reference nephelometer were inoperable. The PID controller 
was replaced on 5/18 and the neph circuit board was replaced on 6/22. On a site visit in 
August the mentor found the PID had not been programmed correctly and was reading erroneous 
flows. The actual flow was at 50% of the recorded flow. Because the sample flow is 
diluted by 50% this makes most if not all of the sample flow from 5/18 to 8/11 from the diluter.

• AOS CCN temperature of the optical particle counter(CCN_T_OPC)
• AOS bin number of lowest channel of OPC include in summation of N_CCN(N_CCN_bin_number)
• AOS CCN temperature at top of column(CCN_T_TEC1)
• AOS CCN volumetric flowrate of sheath air(CCN_Q_sheath)
• AOS CCN temperature of the nafion humidifier(CCN_T_nafion)
• AOS CCN volumetric flowrate of sample air(CCN_Q_sample)
• AOS CCN OPC laser current(CCN_laser_current)
• First stage monitor voltage(CCN_FirstStageMonitorVoltage)
• AOS CCN sample saturation setpoint value reported by instrument(CCN_ss_set)
• AOS CCN temperature of sample air entering the column(CCN_T_sample)
• CCN Propotional valve voltage(CCN_ProportionalValveVoltage)
• AOS CCN sample supersaturation calculated by model)(CCN_ss_calc)
• AOS CCN number concentration by bin(N_CCN_dN)
• AOS CCN standard deviation of difference (CCN_T_TEC1 - CCN_T_TEC3)(CCN_dT_TEC3_TEC1_StdDev)
• Hexadecimal flag, non-zero value means instrument is not operating stably(CCN_temp_unstable_flag)
• AOS CCN temperature at middle of column(CCN_T_TEC2)
• Size of upper limit of each CCN bin(CCN_UpperSizeLimit)
• CCN temperature gradient(CCN_Temperature_Gradient)
• AOS CCN sample pressure(CCN_P_sample)
• AOS CCN temperature of sample air at entrance to instrument(CCN_T_inlet)
• AOS number concentration of CCN(N_CCN)
• AOS CCN temperature at bottom of column(CCN_T_TEC3)

• AOS CLAP or PSAP3W transmittance, green channel(TrG)
• AOS PSAP3W transmittance, red channel(TrR)
• AOS PSAP3W transmittance, blue channel(TrB)

• Relative humidity at wet nephelometer inlet(RH_NephInlet_Wet)
• 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, green channel, 10 um
  size cut, reference three wavelength nephelometer(Bbs_G_Dry_10um_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 light absorption coefficient, green channel, 1 um size cut(Ba_G_Dry_1um_PSAP1W_1)
• Relative humidity inside reference nephelometer inlet(RH_NephVol_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 Blue, corrected for flow and sample area, 3 wavelength
  PSAP, 1 um size cut(Ba_B_Dry_1um_PSAP3W_1)
• Absorption Coefficient Green, corrected for flow and sample area, 3 wavelength
  PSAP, 1 um size cut(Ba_G_Dry_1um_PSAP3W_1)
• Absorption Coefficient Blue, corrected for flow and sample area, 3 wavelength
  PSAP, 10 um size cut(Ba_B_Dry_10um_PSAP3W_1)
• Relative humidity inside wet nephelometer inlet(RH_NephVol_Wet)
• Aerosol total light scattering coefficient, blue channel, 1 um size cut, wet
  three wavelength nephelometer(Bs_B_Wet_1um_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 total light scattering coefficient, green channel, 10 um size cut, wet
  three wavelength nephelometer(Bs_G_Wet_10um_Neph3W_2)
• Condensation Nuclei Concentration Number(N_CPC_1)
• Aerosol backwards-hemispheric light scattering coefficient, blue channel, 1 um
  size cut, reference three wavelength nephelometer(Bbs_B_Dry_1um_Neph3W_1)
• Temperature at reference nephelometer inlet(T_NephInlet_Dry)
• Aerosol total light scattering coefficient, blue channel, 10 um size cut,
  reference three wavelength nephelometer(Bs_B_Dry_10um_Neph3W_1)
• 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,
  reference three wavelength nephelometer(Bs_R_Dry_1um_Neph3W_1)
• Temperature at wet nephelometer inlet(T_NephInlet_Wet)
• 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, red channel, 10 um size cut, wet
  three wavelength nephelometer(Bs_R_Wet_10um_Neph3W_2)
• Aerosol total light scattering coefficient, green channel, 10 um size cut,
  reference three wavelength nephelometer(Bs_G_Dry_10um_Neph3W_1)
• 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, red channel, 1 um
  size cut, reference three wavelength nephelometer(Bbs_R_Dry_1um_Neph3W_1)
• Pressure inside wet nephelometer(P_Neph_Wet)
• Aerosol backwards-hemispheric light scattering coefficient, red channel, 10 um
  size cut, wet three wavelength nephelometer(Bbs_R_Wet_10um_Neph3W_2)
• Aerosol backwards-hemispheric light scattering coefficient, green channel, 10 um
  size cut, wet three wavelength nephelometer(Bbs_G_Wet_10um_Neph3W_2)
• Temperature inside wet nephelometer inlet(T_NephVol_Wet)
• Aerosol backwards-hemispheric light scattering coefficient, green channel, 1 um
  size cut, reference three wavelength nephelometer(Bbs_G_Dry_1um_Neph3W_1)
• Absorption Coefficient Green, corrected for flow and sample area, 3 wavelength
  PSAP, 10 um size cut(Ba_G_Dry_10um_PSAP3W_1)
• Aerosol total light scattering coefficient, red channel, 1 um size cut, wet
  three wavelength nephelometer(Bs_R_Wet_1um_Neph3W_2)
• Pressure inside reference nephelometer(P_Neph_Dry)
• Relative humidity at reference nephelometer inlet(RH_NephInlet_Dry)
• Aerosol light absorption coefficient, green channel, 10 um size cut(Ba_G_Dry_10um_PSAP1W_1)
• Aerosol total light scattering coefficient, red channel, 10 um size cut,
  reference three wavelength nephelometer(Bs_R_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)
• Temperature inside reference nephelometer inlet(T_NephVol_Dry)
• 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, blue channel, 10 um
  size cut, reference three wavelength nephelometer(Bbs_B_Dry_10um_Neph3W_1)
• Absorption Coefficient Red, corrected for flow and sample area, 3 wavelength
  PSAP, 10 um size cut(Ba_R_Dry_10um_PSAP3W_1)
• Aerosol total light scattering coefficient, green channel, 1 um size cut,
  reference three wavelength nephelometer(Bs_G_Dry_1um_Neph3W_1)

NIM/AOS/M1 - CCN failure

The tech noticed that the CCN temperature wasn't stepping correctly and that there wasn't 
much signal. He was able to find and correct the problem by 9/7.

• AOS CCN temperature of the optical particle counter(CCN_T_OPC)
• AOS CCN temperature at middle of column(CCN_T_TEC2)
• AOS bin number of lowest channel of OPC include in summation of N_CCN(N_CCN_bin_number)
• AOS CCN temperature at top of column(CCN_T_TEC1)
• AOS CCN OPC laser current(CCN_laser_current)
• Size of upper limit of each CCN bin(CCN_UpperSizeLimit)
• AOS CCN volumetric flowrate of sheath air(CCN_Q_sheath)
• AOS CCN temperature of the nafion humidifier(CCN_T_nafion)
• AOS CCN number concentration by bin(N_CCN_dN)
• AOS CCN sample supersaturation calculated by model)(CCN_ss_calc)
• AOS CCN sample saturation setpoint value reported by instrument(CCN_ss_set)
• AOS CCN sample pressure(CCN_P_sample)
• AOS CCN volumetric flowrate of sample air(CCN_Q_sample)
• AOS CCN temperature of sample air at entrance to instrument(CCN_T_inlet)
• AOS CCN standard deviation of difference (CCN_T_TEC1 - CCN_T_TEC3)(CCN_dT_TEC3_TEC1_StdDev)
• AOS number concentration of CCN(N_CCN)
• AOS CCN temperature at bottom of column(CCN_T_TEC3)
• Hexadecimal flag, non-zero value means instrument is not operating stably(CCN_temp_unstable_flag)
• AOS CCN temperature of sample air entering the column(CCN_T_sample)

NIM/AOS/M1 - Missing data

Data are missing and unrecoverable.

• AOS CCN temperature of the optical particle counter(CCN_T_OPC)
• AOS bin number of lowest channel of OPC include in summation of N_CCN(N_CCN_bin_number)
• AOS CCN temperature at top of column(CCN_T_TEC1)
• AOS CCN volumetric flowrate of sheath air(CCN_Q_sheath)
• lat(lat)
• AOS CCN temperature of the nafion humidifier(CCN_T_nafion)
• base time(base_time)
• AOS CCN volumetric flowrate of sample air(CCN_Q_sample)
• Time offset of tweaks from base_time(time_offset)
• AOS CCN OPC laser current(CCN_laser_current)
• AOS CCN sample saturation setpoint value reported by instrument(CCN_ss_set)
• AOS CCN temperature of sample air entering the column(CCN_T_sample)
• time(time)
• AOS CCN number concentration by bin(N_CCN_dN)
• AOS CCN sample supersaturation calculated by model)(CCN_ss_calc)
• AOS CCN standard deviation of difference (CCN_T_TEC1 - CCN_T_TEC3)(CCN_dT_TEC3_TEC1_StdDev)
• Hexadecimal flag, non-zero value means instrument is not operating stably(CCN_temp_unstable_flag)
• AOS CCN temperature at middle of column(CCN_T_TEC2)
• Size of upper limit of each CCN bin(CCN_UpperSizeLimit)
• lon(lon)
• AOS CCN sample pressure(CCN_P_sample)
• AOS CCN temperature of sample air at entrance to instrument(CCN_T_inlet)
• AOS number concentration of CCN(N_CCN)
• AOS CCN temperature at bottom of column(CCN_T_TEC3)
• Dummy altitude for Zeb(alt)

• lon(lon)
• time(time)
• Time offset of tweaks from base_time(time_offset)
• lat(lat)
• Dummy altitude for Zeb(alt)
• AOS CLAP or PSAP3W transmittance, green channel(TrG)
• AOS PSAP3W transmittance, red channel(TrR)
• base time(base_time)
• AOS PSAP3W transmittance, blue channel(TrB)

• time(time)
• Temperature of humidograph preheater(T_preHG)
• Relative humidity at wet nephelometer inlet(RH_NephInlet_Wet)
• Aerosol total light scattering coefficient, blue channel, 1 um size cut,
  reference three wavelength nephelometer(Bs_B_Dry_1um_Neph3W_1)
• Dummy altitude for Zeb(alt)
• 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, 10 um
  size cut, reference three wavelength nephelometer(Bbs_R_Dry_10um_Neph3W_1)
• Wind direction(WindDirection)
• Time offset of tweaks from base_time(time_offset)
• Aerosol light absorption coefficient, green channel, 1 um size cut(Ba_G_Dry_1um_PSAP1W_1)
• lat(lat)
• Relative humidity inside reference nephelometer inlet(RH_NephVol_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 Blue, corrected for flow and sample area, 3 wavelength
  PSAP, 1 um size cut(Ba_B_Dry_1um_PSAP3W_1)
• Absorption Coefficient Green, corrected for flow and sample area, 3 wavelength
  PSAP, 1 um size cut(Ba_G_Dry_1um_PSAP3W_1)
• base time(base_time)
• Relative humidity of humidograph preheater(RH_preHG)
• 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, blue channel, 1 um size cut, wet
  three wavelength nephelometer(Bs_B_Wet_1um_Neph3W_2)
• Relative humidity inside wet nephelometer inlet(RH_NephVol_Wet)
• Aerosol backwards-hemispheric light scattering coefficient, blue channel, 1 um
  size cut, wet three wavelength nephelometer(Bbs_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)
• Condensation Nuclei Concentration Number(N_CPC_1)
• Temperature at inlet(T_MainInlet)
• Aerosol backwards-hemispheric light scattering coefficient, blue channel, 1 um
  size cut, reference three wavelength nephelometer(Bbs_B_Dry_1um_Neph3W_1)
• Temperature at reference nephelometer inlet(T_NephInlet_Dry)
• lon(lon)
• Particle Concentration Number from summation of Optical Particle Counter size
  bins(N_OPC_1)
• Aerosol total light scattering coefficient, blue channel, 10 um size cut,
  reference three wavelength nephelometer(Bs_B_Dry_10um_Neph3W_1)
• Relative humidity in ambient air(RH_Ambient)
• Relative humidity at inlet(RH_MainInlet)
• Aerosol total light scattering coefficient, green channel, 1 um size cut, wet
  three wavelength nephelometer(Bs_G_Wet_1um_Neph3W_2)
• IAP system status(flags_NOAA)
• Aerosol total light scattering coefficient, red channel, 1 um size cut,
  reference three wavelength nephelometer(Bs_R_Dry_1um_Neph3W_1)
• Aerosol backwards-hemispheric light scattering coefficient, green channel, 1 um
  size cut, wet three wavelength nephelometer(Bbs_G_Wet_1um_Neph3W_2)
• Temperature at wet nephelometer inlet(T_NephInlet_Wet)
• Aerosol total light scattering coefficient, red channel, 10 um size cut, wet
  three wavelength nephelometer(Bs_R_Wet_10um_Neph3W_2)
• Aerosol total light scattering coefficient, green channel, 10 um size cut,
  reference three wavelength nephelometer(Bs_G_Dry_10um_Neph3W_1)
• Aerosol total light scattering coefficient, blue channel, 10 um size cut, wet
  three wavelength nephelometer(Bs_B_Wet_10um_Neph3W_2)
• Temperature of humidograph controller(T_postHG)
• Aerosol backwards-hemispheric light scattering coefficient, red channel, 1 um
  size cut, reference three wavelength nephelometer(Bbs_R_Dry_1um_Neph3W_1)
• Pressure inside wet nephelometer(P_Neph_Wet)
• Aerosol backwards-hemispheric light scattering coefficient, red channel, 10 um
  size cut, wet three wavelength nephelometer(Bbs_R_Wet_10um_Neph3W_2)
• Aerosol backwards-hemispheric light scattering coefficient, green channel, 10 um
  size cut, wet three wavelength nephelometer(Bbs_G_Wet_10um_Neph3W_2)
• Temperature inside wet nephelometer inlet(T_NephVol_Wet)
• Aerosol backwards-hemispheric light scattering coefficient, green channel, 1 um
  size cut, reference three wavelength nephelometer(Bbs_G_Dry_1um_Neph3W_1)
• Absorption Coefficient Green, corrected for flow and sample area, 3 wavelength
  PSAP, 10 um size cut(Ba_G_Dry_10um_PSAP3W_1)
• Temperature of ambient air(T_Ambient)
• Wind speed(WindSpeed)
• Aerosol total light scattering coefficient, red channel, 1 um size cut, wet
  three wavelength nephelometer(Bs_R_Wet_1um_Neph3W_2)
• Relative humidity at reference nephelometer inlet(RH_NephInlet_Dry)
• Pressure inside reference nephelometer(P_Neph_Dry)
• Aerosol light absorption coefficient, green channel, 10 um size cut(Ba_G_Dry_10um_PSAP1W_1)
• Aerosol total light scattering coefficient, red channel, 10 um size cut,
  reference three wavelength nephelometer(Bs_R_Dry_10um_Neph3W_1)
• Relative humidity of humidograph controller(RH_postHG)
• Aerosol backwards-hemispheric light scattering coefficient, red channel, 1 um
  size cut, wet three wavelength nephelometer(Bbs_R_Wet_1um_Neph3W_2)
• Temperature inside reference nephelometer inlet(T_NephVol_Dry)
• 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, blue channel, 10 um
  size cut, reference three wavelength nephelometer(Bbs_B_Dry_10um_Neph3W_1)
• Absorption Coefficient Red, corrected for flow and sample area, 3 wavelength
  PSAP, 10 um size cut(Ba_R_Dry_10um_PSAP3W_1)
• Aerosol total light scattering coefficient, green channel, 1 um size cut,
  reference three wavelength nephelometer(Bs_G_Dry_1um_Neph3W_1)
• Pressure of ambient air(P_Ambient)

SGP/AOS/C1/ - Pump failure

The ratio of CCN to CN started to noticeably decline around 20070901. After a site visit 
on 20071023, the mentor found a problem with the instrument flows and diaphragm pump.  The 
instrument was return to Boulder, CO for repair. The diaphragm pump was repaired and the 
flows re-calibrated. The instrument was returned to service 20071113. 

The CCN data show qualitative changes in the number of droplets formed with changes in 
supersaturation. Because the pump was not working properly and the flows were likely 
incorrect, the numbers are not quantitative.

• AOS CCN sample supersaturation calculated by model)(CCN_ss_calc)
• CCN temperature gradient(CCN_Temperature_Gradient)
• AOS bin number of lowest channel of OPC include in summation of N_CCN(N_CCN_bin_number)
• AOS CCN sample pressure(CCN_P_sample)
• AOS CCN sample saturation setpoint value reported by instrument(CCN_ss_set)
• AOS CCN volumetric flowrate of sheath air(CCN_Q_sheath)
• AOS number concentration of CCN(N_CCN)
• AOS CCN volumetric flowrate of sample air(CCN_Q_sample)
• AOS CCN number concentration by bin(N_CCN_dN)

HFE/AOS/M1 - CCN missing

A power regulator on the CCN circuit board failed. The mentor replaced it and it was up 
and working on 7/25/2008.

• AOS CCN temperature at middle of column(CCN_T_TEC2)
• Size of upper limit of each CCN bin(CCN_UpperSizeLimit)
• AOS bin number of lowest channel of OPC include in summation of N_CCN(N_CCN_bin_number)
• AOS CCN temperature of the optical particle counter(CCN_T_OPC)
• AOS CCN volumetric flowrate of sample air(CCN_Q_sample)
• AOS CCN temperature of sample air at entrance to instrument(CCN_T_inlet)
• AOS CCN temperature of the nafion humidifier(CCN_T_nafion)
• AOS CCN temperature at bottom of column(CCN_T_TEC3)
• CCN Propotional valve voltage(CCN_ProportionalValveVoltage)
• AOS CCN sample pressure(CCN_P_sample)
• AOS CCN sample supersaturation calculated by model)(CCN_ss_calc)
• CCN temperature gradient(CCN_Temperature_Gradient)
• Hexadecimal flag, non-zero value means instrument is not operating stably(CCN_temp_unstable_flag)
• AOS CCN temperature of sample air entering the column(CCN_T_sample)
• AOS CCN volumetric flowrate of sheath air(CCN_Q_sheath)
• AOS CCN standard deviation of difference (CCN_T_TEC1 - CCN_T_TEC3)(CCN_dT_TEC3_TEC1_StdDev)
• First stage monitor voltage(CCN_FirstStageMonitorVoltage)
• AOS CCN temperature at top of column(CCN_T_TEC1)
• AOS CCN OPC laser current(CCN_laser_current)
• AOS number concentration of CCN(N_CCN)
• AOS CCN sample saturation setpoint value reported by instrument(CCN_ss_set)
• AOS CCN number concentration by bin(N_CCN_dN)