AWR/MET/M1 - PWD Sensor Not Installed

The PWD was not connected during this period.

• pwd_cumul_rain
• PWD 1 minute mean precipitation rate(pwd_precip_rate_mean_1min)
• pwd_pw_code_15min
• pwd_err_code
• PWD 1 minute mean visibility(pwd_mean_vis_1min)
• PWD 10 minute mean visibility(pwd_mean_vis_10min)
• pwd_pw_code_inst
• pwd_pw_code_1hr
• pwd_cumul_snow

AWR/MET/M1 - Temperature, RH, Vapor Pressure Incorrect

Temperature and vapor pressure were missing and the RH was flatlined below 0.

• vapor_pressure_std
• rh_std
• Temperature mean(temp_mean)
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• Vapor pressure mean, calculated(vapor_pressure_mean)
• temp_std

AWR/MET/M1 - PWD Incorrect

The PWD was reporting errors during the setup period and was reporting large amounts of 
precipitation.

• pwd_cumul_rain
• PWD 1 minute mean precipitation rate(pwd_precip_rate_mean_1min)
• pwd_pw_code_15min
• pwd_err_code
• PWD 1 minute mean visibility(pwd_mean_vis_1min)
• PWD 10 minute mean visibility(pwd_mean_vis_10min)
• pwd_pw_code_inst
• pwd_pw_code_1hr
• pwd_cumul_snow

AWR/SONDE/M1 - Suspect Surface Temperature or RH

For the times listed, surface values of either Temperature or Relative Humidity appear to 
be suspect.

• Temperature, dewpoint, at altitude(dp)
• Dry Bulb Temperature(tdry)
• Humidity, relative, on hybrid-b grid, derived from RUC model(rh)

AWR/AOSMET/M1 -  Reprocessed and Corrected: Wind direction offset by 19 degrees

DATA REPROCESSED and CORRECTED: 

The wind direction sensor was not installed to true north. GPS calculation confirmed the 
wind direction was off by 19 degrees, in the positive. The AOSMET data were reprocessed to 
correct the wind direction.

The data were archived in September 2016. Please retrieve the reprocessed data for use in 
your analysis.

You may find these data using the ARM Discovery tool at the following link:
http://www.archive.arm.gov/discovery/#v/results/s/finst::aosmet/fsite::awr/ffac::awr.M1

ORIGINAL DQR CATEGORY: Red( Incorrect)

REPROCESSED and CORRECTED DATA ARCHIVED:2016-09

REPROCESS IDENTIFICATION NUMBER: RID 1431

---------------------------------------------------
--- ORIGINAL DQR DESCRIPTION ---
---------------------------------------------------

The wind direction sensor was not installed to true north. GPS calculation confirmed the 
wind direction was off by 19 degrees, in the positive. The sensor was aligned to true 
north on 2015-12-23. Prior data will be reprocessed by subtracting 19 degrees from wind 
direction.

• Wind direction, relative to true North(WindDirection)

AWR/HTDMA/M1 - HT-DMA CPC zero counts

HT-DMA CPC butanol flooding or contamination. CPC was showing zero counts. Intermittent 
counts from troubleshooting. No valid data.

• Total concentration(total_concentration)
• scan_max_diameter_setting
• bin_width
• bin_center
• num_bins
• bin
• dry_diameter_setting
• dry_rh_setting
• Concentration of aerosol(aerosol_concentration)
• scan_min_diameter_setting

AWR/CCN/M1 - Reprocess: CCN incorrect time

The CCN computer time was ahead by about 3 minutes. See  an attached file 
 for exact numbers. Data quality not affected.

• T_OPC
• size_bin_bounds
• T_set_TEC3
• eta_target
• time_offset
• reported_temperature_gradient
• Q_sheath
• proportional_valve_voltage
• T_set_gradient
• qc_N_CCN
• first_stage_monitor_voltage
• supersaturation_calculated_target
• laser_current
• T_read_gradient
• time
• Mean number concentration of N_CCN(N_CCN)
• AOS bin number of lowest channel of OPC include in summation of N_CCN(N_CCN_bin_number)
• size_bin
• eta_lookup_table
• eta
• T_set_TEC2
• overflow
• T_set_TEC1
• T_sample
• seconds_after_transition
• Q_sample
• supersaturation_set_point
• T_nafion
• T_inlet
• AOS CCN droplet count by bin size(N_CCN_dN)
• temp_unstable
• temperature_std
• base_time
• T_read_TEC3
• dT_target_estimated
• P_sample
• dT_OPC
• T_read_TEC1
• supersaturation_calculated
• T_read_TEC2

• CCN_T_read_TEC3
• CCN_P_sample
• CCN_temp_unstable
• CCN_overflow
• CCN_proportional_valve_voltage
• CCN_T_sample
• CCN_t_read_TEC3
• CCN_super_saturation_calculated
• size_bin_bounds
• CCN_t_read_TEC1
• CCN_t_read_TEC2
• CCN_T_inlet
• time
• CCN_T_OPC
• Mean number concentration of N_CCN(N_CCN)
• CCN_T_inlet_set
• CCN_baseline_monitor
• CCN_temperature_std
• AOS CCN droplet count by bin size(N_CCN_dN)
• size_bin
• CCN_laser_current
• CCN_temp_unstable_flag
• CCN_OPC_set
• CCN_first_stage_monitor_voltage
• CCN_T_nafion
• AOS bin number of lowest channel of OPC include in summation of N_CCN(N_CCN_bin_number)
• CCN_T_nafion_set
• base_time
• CCN_T_set_TEC3
• CCN_supersaturation_set_point
• CCN_Q_sample
• CCN_T_set_TEC1
• CCN_T_set_TEC2
• CCN_Q_sheath
• CCN_alarm_code
• CCN_ss_set
• CCN_temperature_gradient
• CCN_T_read_TEC1
• CCN_T_read_TEC2
• time_offset

AWR/HTDMA/M1 - Low instrument flows

External vacuum was lost, affecting instrument flows. No valid data from the time period.

• scan_max_diameter_setting
• Total concentration(total_concentration)
• scan_time_setting
• bin_width
• num_bins
• dry_diameter_setting
• dry_rh_setting
• sample_flow
• humid_rh
• bin_center
• bin
• atomizer
• scan_type
• scan_min_diameter_setting
• Concentration of aerosol(aerosol_concentration)

AWR/LDIS/MET/S1 - Precipitation Measurements Suspect

Analysis of the PARS2 and the PWD precipitation data indicate that the results are 
suspect, possibly due to frost/blowing snow.  Both instruments reported precipitation for a 
majority of the days.

The TSI movies were reviewed and the days of noticeable precipitation are:

12/26/15
12/31/15 - Potentially just frost buildup
1/6/16
1/11/16
1/12/16
1/13/16

• PWD 1 minute mean precipitation rate(pwd_precip_rate_mean_1min)
• pwd_cumul_snow
• pwd_pw_code_15min
• pwd_cumul_rain
• PWD 1 minute mean visibility(pwd_mean_vis_1min)
• pwd_pw_code_inst
• pwd_pw_code_1hr
• pwd_err_code
• PWD 10 minute mean visibility(pwd_mean_vis_10min)

AWR/HTDMA/M1 - No particle counts

No particle counts after the instrument was turned on. Probably no butanol flow to the 
instrument or possibly a disconnected pump. No meaningful data saved.

• Total concentration(total_concentration)
• Concentration of aerosol(aerosol_concentration)

AWR/HTDMA/M1 - Intermittent zero counts

Particle counts intermittently going to zero. Probably blocked butanol flow to the 
instrument or possibly internal air flow instability.

• scan_max_diameter_setting
• Total concentration(total_concentration)
• scan_time_setting
• bin_width
• num_bins
• dry_diameter_setting
• dry_rh_setting
• sample_flow
• humid_rh
• bin_center
• atomizer
• scan_type
• scan_min_diameter_setting
• Concentration of aerosol(aerosol_concentration)

AWR/AOSMET/M1 - Installation period

During this installation period, there were problems with the data messages being sent 
from the sensor. Some data are missing, and available data experience occasional dropouts.

• Ambient air temperature(T_Ambient)
• heater_temp
• ref_volts
• Wind direction, relative to true North(WindDirection)
• Ambient pressure(P_Ambient)
• heater_volts
• Rain amount(rain_amount)
• Wind speed(WindSpeed)
• Ambient air relative humidity(RH_Ambient)
• Rain Duration(rain_duration)
• Rain intensity(rain_intensity)

AWR/CCN/M1 - Instrument warming up

Instrument warming up. No valid data.

• T_OPC
• T_set_TEC3
• eta_target
• reported_temperature_gradient
• Q_sheath
• proportional_valve_voltage
• T_set_gradient
• supersaturation_calculated_target
• first_stage_monitor_voltage
• laser_current
• T_read_gradient
• Mean number concentration of N_CCN(N_CCN)
• AOS bin number of lowest channel of OPC include in summation of N_CCN(N_CCN_bin_number)
• size_bin
• eta_lookup_table
• eta
• overflow
• T_set_TEC2
• T_set_TEC1
• T_sample
• seconds_after_transition
• Q_sample
• supersaturation_set_point
• T_nafion
• T_inlet
• AOS CCN droplet count by bin size(N_CCN_dN)
• temp_unstable
• temperature_std
• T_read_TEC3
• dT_target_estimated
• P_sample
• dT_OPC
• T_read_TEC1
• T_read_TEC2
• supersaturation_calculated

• CCN_T_read_TEC3
• CCN_P_sample
• CCN_temp_unstable
• CCN_overflow
• CCN_proportional_valve_voltage
• CCN_T_sample
• CCN_t_read_TEC3
• CCN_super_saturation_calculated
• CCN_t_read_TEC1
• CCN_t_read_TEC2
• CCN_T_inlet
• CCN_T_OPC
• Mean number concentration of N_CCN(N_CCN)
• CCN_T_inlet_set
• CCN_baseline_monitor
• CCN_temperature_std
• AOS CCN droplet count by bin size(N_CCN_dN)
• size_bin
• CCN_laser_current
• CCN_temp_unstable_flag
• CCN_OPC_set
• CCN_first_stage_monitor_voltage
• CCN_T_nafion
• AOS bin number of lowest channel of OPC include in summation of N_CCN(N_CCN_bin_number)
• CCN_T_nafion_set
• CCN_T_set_TEC3
• CCN_supersaturation_set_point
• CCN_Q_sample
• CCN_T_set_TEC1
• CCN_T_set_TEC2
• CCN_Q_sheath
• CCN_alarm_code
• CCN_ss_set
• CCN_temperature_gradient
• CCN_T_read_TEC1
• CCN_T_read_TEC2

AWR/CPC/M1 - Failed pump

The pumps that draw air into the instrument for particles to be counted failed.  The 
values reported by the instrument are not representative of the particle number concentration 
in the atmosphere

• AOS number concentration of CN (concentration)(concentration)

• AOS number concentration of CN (concentration)(concentration)

AWR/CPC/M1 - Instrument Startup, No Data Collected

At the instrument startup of the AMF2 deployment, the computers were turned on before the 
instruments were turned on.  The data collection starts automatically on instrument 
startup, but if the instruments are not on and connected, the data text files will contain 
missing data codes such as NaN or -9999.

• ambient_pressure
• cabinet_temp
• condensation_temp
• AOS number concentration of CN (concentration)(concentration)
• fraction_full
• laser_current
• orifice_pressure
• liquid_level
• optics_temp
• nozzle_pressure
• saturation_temp

AWR/RWP/M1 - Reprocess: Missing high power mode

The first hourly file (which is at 03:00 UTC) for some reason has data only for low power 
mode. Ingest seems to have processed this mode, and not encountering the high power mode, 
hasn't handled the subsequent hours of data.

• Radial velocity(radial_velocity)
• qc_num_time_domain
• qc_wind_quality
• qc_averaging_interval
• qc_num_code_bits
• Pressure, associated geometric height, at altitude, NGM model output(height)
• qc_zenith_angle
• beam
• qc_transmit_power_level_setting
• radial_velocity_width
• qc_wind_quality_interval
• mode_name
• qc_fourier_transform_length
• num_code_bits
• qc_height
• wind_quality
• qc_wind_w_std
• mode
• wind_speed_std
• level
• num_azimuth_beams
• qc_radial_velocity_power
• qc_wind_speed_std
• num_frequency_domain
• qc_azimuth
• averaging_interval
• missing_mode
• Wind direction(wind_direction)
• Wind speed, at 10 meters height(wind_speed)
• qc_wind_direction
• zenith_angle
• qc_radial_velocity_width
• qc_radial_velocity_navg
• azimuth
• qc_radial_velocity_snr
• num_time_domain
• mode_number
• pulse_width
• qc_wind_speed
• qc_wind_w
• radial_velocity_power
• num_levels
• qc_wind_u
• qc_wind_v
• num_range_gates
• qc_num_frequency_domain
• qc_pulse_width
• radial_velocity_navg
• wind_quality_interval
• transmit_power_level_setting
• wind_w_std
• qc_radial_velocity
• interpulse_period
• W component of wind velocity(wind_w)
• Wind speed, S-to-N component, at 10-m height, ECMWF model-derived(wind_v)
• 10m wind u-component(wind_u)
• radial_velocity_snr
• fourier_transform_length
• qc_interpulse_period

AWR/AOSMET/M1 - Poor sensitivity to snow

The sensor plate that detects precipitation impact is not sensitive enough to detect snow 
(especially light snow). During the AWR deployment, all precipitation measurements from 
the AOSMETM1 data streams should be carefully considered and compared with colocated 
precipitation measurements.

• Rain amount(rain_amount)
• Rain Duration(rain_duration)
• Rain intensity(rain_intensity)

AWR/CPC/M1 - CPC Flooding

Following a routine flow rate check, the CPC showed signs of flooding with the orifice 
pressure dropping below 10 kPa.  The butanol fill bottle was removed from the system.  After 
two days of continuous running the system dried out and the orifice pressures were 
restored to nominal values.  The data from this period is suspect.

• AOS number concentration of CN (concentration)(concentration)

• AOS number concentration of CN (concentration)(concentration)

AWR/MET/M1  - Missing or suspect PWD data due to heavy snow

Heavy snow interfered with the instrument lenses causing backscatter and missing data. 
Data from the present weather detector during this time is suspect or missing.

• pwd_cumul_rain
• PWD 1 minute mean precipitation rate(pwd_precip_rate_mean_1min)
• pwd_pw_code_15min
• PWD 1 minute mean visibility(pwd_mean_vis_1min)
• PWD 10 minute mean visibility(pwd_mean_vis_10min)
• pwd_pw_code_inst
• pwd_pw_code_1hr
• pwd_cumul_snow

AWR/AOSMET/M1 - Icing event

Significant icing was noted during this time. For most of the period, wind data are 
missing due to ice buildup on the sensor. Available data for temperature, humidity, pressure, 
precipitation, and winds during this time should not be used.

• Ambient air temperature(T_Ambient)
• Wind direction, relative to true North(WindDirection)
• Ambient pressure(P_Ambient)
• Rain amount(rain_amount)
• Wind speed(WindSpeed)
• Ambient air relative humidity(RH_Ambient)
• Rain Duration(rain_duration)
• Rain intensity(rain_intensity)

AWR/MET/M1 - Probable instrument icing

The temperature and relative humidity sensor behaved suspiciously during this time. 
Temperature and relative humidity readings did not trend inversely, as expected. Ice buildup on 
the instrument is the probable cause.

• Temperature mean(temp_mean)
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• Vapor pressure mean, calculated(vapor_pressure_mean)

AWR/CPC/NEPHELOMETER/PSAP/M1 - Low impactor flow

CPC inlet not properly connected to the sample lines. Flow through the impactor below 
nominal. Instruments sampling cabin air at least part of the time.

• ambient_pressure
• condensation_temp
• liquid_level
• dilution_valve_position
• dilution_flow_setpoint
• fraction_full
• orifice_pressure
• nozzle_pressure
• dilution_flow_reading
• cabinet_temp
• AOS number concentration of CN (concentration)(concentration)
• laser_current
• optics_temp
• saturation_temp

• saturation_temp
• fraction_full
• dilution_slope
• AOS number concentration of CN (concentration)(concentration)
• dilution_flow_setpoint
• optics_temp
• cabinet_temp
• nozzle_pressure
• orifice_pressure
• dilution_intercept
• dilution_valve_position
• dilution_flow_reading
• laser_current
• aerosol_flow_calibrated
• ambient_pressure
• dilution_correction_factor
• condensation_temp
• liquid_level

AWR/CCN/CPC/M1 - Concentration difference

Various tests performed to understand why the CCN counts sometimes exceed those of a 
co-located CPC. Instrument functioning normally, but occasionally sampling cabin air during 
this period or running with internal flow lines opened for flow measurements.

• T_OPC
• reported_temperature_gradient
• T_set_gradient
• laser_current
• Mean number concentration of N_CCN(N_CCN)
• eta_lookup_table
• T_set_TEC2
• T_set_TEC1
• T_sample
• T_inlet
• AOS CCN droplet count by bin size(N_CCN_dN)
• temp_unstable
• temperature_std
• T_read_TEC3
• dT_OPC
• T_read_TEC1
• T_read_TEC2
• size_bin_bounds
• T_set_TEC3
• eta_target
• Q_sheath
• proportional_valve_voltage
• supersaturation_calculated_target
• first_stage_monitor_voltage
• T_read_gradient
• AOS bin number of lowest channel of OPC include in summation of N_CCN(N_CCN_bin_number)
• size_bin
• eta
• overflow
• seconds_after_transition
• Q_sample
• supersaturation_set_point
• T_nafion
• dT_target_estimated
• P_sample
• supersaturation_calculated

• CCN_T_read_TEC3
• CCN_temp_unstable
• CCN_overflow
• CCN_T_sample
• CCN_super_saturation_calculated
• CCN_T_inlet
• Mean number concentration of N_CCN(N_CCN)
• CCN_T_OPC
• CCN_T_inlet_set
• CCN_baseline_monitor
• AOS CCN droplet count by bin size(N_CCN_dN)
• size_bin
• CCN_laser_current
• CCN_temp_unstable_flag
• CCN_OPC_set
• CCN_T_nafion
• AOS bin number of lowest channel of OPC include in summation of N_CCN(N_CCN_bin_number)
• CCN_T_set_TEC3
• CCN_Q_sample
• CCN_T_set_TEC1
• CCN_T_set_TEC2
• CCN_alarm_code
• CCN_ss_set
• CCN_temperature_gradient
• CCN_T_read_TEC1
• CCN_T_read_TEC2
• CCN_P_sample
• CCN_proportional_valve_voltage
• CCN_t_read_TEC3
• CCN_t_read_TEC1
• CCN_t_read_TEC2
• CCN_temperature_std
• CCN_first_stage_monitor_voltage
• CCN_T_nafion_set
• CCN_supersaturation_set_point
• CCN_Q_sheath

• cabinet_temp
• ambient_pressure
• dilution_flow_setpoint
• fraction_full
• nozzle_pressure
• dilution_flow_reading
• AOS number concentration of CN (concentration)(concentration)
• orifice_pressure
• optics_temp
• condensation_temp
• liquid_level
• dilution_valve_position
• laser_current
• saturation_temp

• saturation_temp
• fraction_full
• dilution_slope
• cabinet_temp
• dilution_flow_reading
• dilution_correction_factor
• condensation_temp
• optics_temp
• orifice_pressure
• dilution_intercept
• laser_current
• aerosol_flow_calibrated
• dilution_flow_setpoint
• nozzle_pressure
• ambient_pressure
• AOS number concentration of CN (concentration)(concentration)
• dilution_valve_position
• liquid_level

AWR/AOSMET/M1 - Loose cable

A loose cable caused an instrument communication failure during these times. All data are 
missing.

• Ambient air temperature(T_Ambient)
• supply_volts
• heater_temp
• ref_volts
• Wind direction, relative to true North(WindDirection)
• Ambient pressure(P_Ambient)
• heater_volts
• Rain amount(rain_amount)
• Wind speed(WindSpeed)
• Ambient air relative humidity(RH_Ambient)
• Rain Duration(rain_duration)
• Rain intensity(rain_intensity)

AWR/RWP/M1 - Data collection

Instrument computer was put on stand by since it had reached 90% storage capacity. 
Therefore, data is missing/was not recorded during the DQPR period.

• Radial velocity(radial_velocity)
• qc_num_time_domain
• qc_wind_quality
• qc_averaging_interval
• qc_num_code_bits
• Pressure, associated geometric height, at altitude, NGM model output(height)
• East longitude(lon)
• qc_zenith_angle
• beam
• qc_transmit_power_level_setting
• radial_velocity_width
• qc_wind_quality_interval
• mode_name
• qc_fourier_transform_length
• num_code_bits
• qc_height
• wind_quality
• qc_wind_w_std
• mode
• wind_speed_std
• level
• num_azimuth_beams
• qc_radial_velocity_power
• qc_wind_speed_std
• num_frequency_domain
• time_offset
• qc_azimuth
• averaging_interval
• missing_mode
• Wind direction(wind_direction)
• Wind speed, at 10 meters height(wind_speed)
• qc_wind_direction
• zenith_angle
• qc_radial_velocity_width
• qc_radial_velocity_navg
• azimuth
• qc_radial_velocity_snr
• num_time_domain
• Altitude above mean sea level(alt)
• mode_number
• pulse_width
• radial_velocity_power
• time
• qc_wind_w
• qc_wind_speed
• num_levels
• qc_wind_u
• qc_wind_v
• num_range_gates
• qc_num_frequency_domain
• qc_pulse_width
• radial_velocity_navg
• wind_quality_interval
• transmit_power_level_setting
• wind_w_std
• qc_radial_velocity
• base_time
• interpulse_period
• W component of wind velocity(wind_w)
• Wind speed, S-to-N component, at 10-m height, ECMWF model-derived(wind_v)
• 10m wind u-component(wind_u)
• radial_velocity_snr
• qc_time
• fourier_transform_length
• qc_interpulse_period
• North latitude(lat)

AWR/AOSMET/M1 - Heavy frost on wind sensor

A period of heavy frost on the wind transducers prevented wind data from being recorded.

• Wind direction, relative to true North(WindDirection)
• Wind speed(WindSpeed)

AWR/CPC/M1 - Communication problem

The configuration file used for LabVIEW to communicate with the instrument was changed 
causing a communication problem.  The file was replaced and the instrument is now 
functioning properly.

• ambient_pressure
• time
• condensation_temp
• liquid_level
• time_offset
• dilution_valve_position
• base_time
• dilution_flow_setpoint
• East longitude(lon)
• Altitude above mean sea level(alt)
• fraction_full
• orifice_pressure
• nozzle_pressure
• dilution_flow_reading
• cabinet_temp
• AOS number concentration of CN (concentration)(concentration)
• laser_current
• North latitude(lat)
• optics_temp
• saturation_temp

• fraction_full
• saturation_temp
• time_offset
• dilution_slope
• qc_concentration
• AOS number concentration of CN (concentration)(concentration)
• dilution_flow_setpoint
• optics_temp
• cabinet_temp
• nozzle_pressure
• base_time
• orifice_pressure
• dilution_intercept
• dilution_valve_position
• Altitude above mean sea level(alt)
• dilution_flow_reading
• laser_current
• North latitude(lat)
• East longitude(lon)
• aerosol_flow_calibrated
• time
• ambient_pressure
• dilution_correction_factor
• condensation_temp
• liquid_level