NSA/METTWR/C1 - power outage at 40m level

40m level lost power so no data was collected from this level.

• Standard Deviation of 40m Temperature(T40M_STD)
• Standard Deviation of 40m Calculated Vapor Pressure(VP40M_STD)
• 40m Average QLI Reference Voltage(Volt40M_AVG)
• 40m Vector Averaged Wind Direction(WD40M_DU_WVT)
• Standard Deviation of 40m Vector Averaged Wind Direction(WD40M_SDU_WVT)
• 40m Arithmetic Mean Wind Speed(WS40M_S_WVT)
• 40m Average Temperature(T40M_AVG)
• Standard Deviation of 40m Calculated Dew Point(DP40M_STD)
• 40m Average Relative Humidity(RH40M_AVG)
• 40m Average Calculated Dew Point(DP40M_AVG)
• 40m Average Calculated Vapor Pressure(VP40M_AVG)
• Standard Deviation of 40m Relative Humidity(RH40M_STD)
• 40m Vector Averaged Wind Speed(WS40M_U_WVT)
• 40m Average QLI Reference Temperature(RefT40M_AVG)

NSA/METTWR/C1 - Chilled Mirror transmit logic board chipset unsuited for Arctic 
temperatures

Data missing due to problems with manufacturer's transmit logic board chipset.  They were 
generic chips not rated for Arctic temperatures.

• Chilled Mirror Calculated Relative Humidity(CMHRH)
• Chilled Mirror Dew Point(CMHDP)
• Chilled Mirror Temperature(CMHTemp)
• Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)

NSA/METTWR/C1 - CMH Dew Point and RH data Incorrect

The Chilled Mirror Dew Point reported negative dew point values.  This caused the RH to be 
much lower than reality also.  Compared to the 2m level the RH and dew point from the 
CMH are incorrect.  Mirror was dirty, it was removed, cleaned and recalibrated.

• Chilled Mirror Calculated Relative Humidity(CMHRH)
• Chilled Mirror Dew Point(CMHDP)

NSA/METTWR/C1 - Instrument problem, Contamination, False signal

Heavy, wet and blowing snow and ice caused measurement problems with the sonic anemometer 
mounted at the 2m level.  Erroneous readings caused both the wind speed and direction 
values to be reported anomolously.  Once the heavy, wet snow and ice stopped the readings 
returned to normal.

• Sonic Arithmetic Mean Wind Speed(SonicWS_S_WVT)
• Sonic Vector Averaged Wind Direction(SonicWD_DU_WVT)
• Average Y Component of Sonic Wind Speed(SonicY_AVG)
• Standard Deviation of Sonic Vector Averaged Wind Direction(SonicWD_SDU_WVT)
• Average Sonic Static Speed of Sound(SonicS_AVG)
• Sonic Vector Averaged Wind Speed(SonicWS_U_WVT)
• Average X Component of Sonic Wind Speed(SonicX_AVG)

NSA/METTWR/C1 - 20m Temperature/RH Sensor Failing

The 20m temperature and RH sensor began reading high on 20040719.
Aspirator fan failure caused a portion of the high reading.  New fan
failed to correct for all errors.  Sensor replaced on 20040908 with
recently calibrated sensor.

• Standard Deviation of 20m Calculated Dew Point(DP20M_STD)
• Standard Deviation of 20m Calculated Vapor Pressure(VP20M_STD)
• 20m Average Temperature(T20M_AVG)
• Standard Deviation of 20m Relative Humidity(RH20M_STD)
• 20m Average Relative Humidity(RH20M_AVG)
• 20m Average Calculated Vapor Pressure(VP20M_AVG)
• 20m Average Calculated Dew Point(DP20M_AVG)
• Standard Deviation of 20m Temperature(T20M_STD)

NSA/METTWR/C1 - Sonic - Instrument problem, Contamination, False signal

Heavy, wet and blowing snow and ice caused measurement problems with the sonic anemometer 
mounted at the 2m level.  Erroneous readings caused both the wind speed and direction 
values to be reported anomolously.	Once the heavy, wet snow and ice stopped the readings 
returned to normal.

• Sonic Arithmetic Mean Wind Speed(SonicWS_S_WVT)
• Sonic Vector Averaged Wind Direction(SonicWD_DU_WVT)
• Average Y Component of Sonic Wind Speed(SonicY_AVG)
• Standard Deviation of Sonic Vector Averaged Wind Direction(SonicWD_SDU_WVT)
• Average Sonic Static Speed of Sound(SonicS_AVG)
• Sonic Vector Averaged Wind Speed(SonicWS_U_WVT)
• Average X Component of Sonic Wind Speed(SonicX_AVG)

NSA/METTWR/C1 - Instrument problem, Frosting/Condensation

The 2m T & RH values were not in very good agreement with the CMH data or the other tower 
levels.  A failed aspirator fan caused the readings to be incorrect.

• 2m Average Calculated Vapor Pressure(VP2M_AVG)
• Standard Deviation of 2m Calculated Dew Point(DP2M_STD)
• Standard Deviation of 2m Relative Humidity(RH2M_STD)
• 2m Average Relative Humidity(RH2M_AVG)
• Standard Deviation of 2m Calculated Vapor Pressure(VP2M_STD)
• 2m Average Temperature(T2M_AVG)
• Standard Deviation of 2m Temperature(T2M_STD)
• 2m Average Calculated Dew Point(DP2M_AVG)

NSA/METTWR/C1 - All 10m level Data Missing

After prolonged power outage and many power spikes during the outage all data from the 10m 
level are missing.  Blown fuse on the power supply was replaced once the temperatures 
warmed enough to allow the lowering of the tower carriages.

• 10m Average Calculated Dew Point(DP10M_AVG)
• 10m Average QLI Reference Temperature(RefT10m_AVG)
• Standard Deviation of 10m Calculated Vapor Pressure(VP10M_STD)
• 10m Average Relative Humidity(RH10M_AVG)
• 10m Vector Averaged Wind Speed(WS10M_U_WVT)
• 10m Average Calculated Vapor Pressure(VP10M_AVG)
• 10m Average QLI Input Voltage(Volt10M_AVG)
• Standard Deviation of 10m Vector Averaged Wind Direction(WD10M_SDU_WVT)
• 10m Average Temperature(T10M_AVG)
• Standard Deviation of 10m Relative Humidity(RH10M_STD)
• 10m Arithmetic Mean Wind Speed(WS10M_S_WVT)
• 10m Vector Averaged Wind Direction(WD10M_DU_WVT)
• Standard Deviation of 10m Calculated Dew Point(DP10M_STD)
• Standard Deviation of 10m Temperature(T10M_STD)

NSA/METTWR/C1 - Instrument problem

2m wind direction reporting only 236 degrees.  Sensor failure.

• Standard Deviation of 2m Vector Averaged Wind Direction(WD2M_SDU_WVT)
• 2m Vector Averaged Wind Direction(WD2M_DU_WVT)

NSA/METTWR/C1 - Reprocess: Incorrect windspeed units

Power fluctuations caused the Ultrasonic wind sensor to revert to default setting of 
reporting wind speed in mph.  Setting was changed back to m/s.

• Sonic Arithmetic Mean Wind Speed(SonicWS_S_WVT)
• Average Y Component of Sonic Wind Speed(SonicY_AVG)
• Average Sonic Static Speed of Sound(SonicS_AVG)
• Sonic Vector Averaged Wind Speed(SonicWS_U_WVT)
• Average X Component of Sonic Wind Speed(SonicX_AVG)

NSA/METTWR/C1 - Instrument problem, Contamination, False signal

Data in error due to heavy snow during blizzard conditions.

• Sonic Arithmetic Mean Wind Speed(SonicWS_S_WVT)
• Sonic Vector Averaged Wind Direction(SonicWD_DU_WVT)
• Average Y Component of Sonic Wind Speed(SonicY_AVG)
• Standard Deviation of Sonic Vector Averaged Wind Direction(SonicWD_SDU_WVT)
• Average Sonic Static Speed of Sound(SonicS_AVG)
• Sonic Vector Averaged Wind Speed(SonicWS_U_WVT)
• Average X Component of Sonic Wind Speed(SonicX_AVG)

NSA/C1 - Site-wide power failure

The Barrow facility experienced a site-wide power failure on 12/13.  Power was restored to 
most instruments between 2250 and 2330 GMT.

• Elevation angle of Beam 4 for WINDS data(elevation4)
• Power offset(power)
• Average Interval(avgint)
• east longitude for all the input platforms.(lon)
• Number of Values Required for Consensus, Beam 4(nrcns4)
• Number of values that passed consensus, beam 2(ncns2)
• Azimuth of Beam 2 for WINDS data(azimuth2)
• Elevation angle of Beam 0 for WINDS data(elevation0)
• Beam 1 radial wind speed(vel1)
• Sample Rate(sampr)
• Rx bandwidth switch code(bswitch)
• Height Index(range_gate)
• Signal to Noise Ratio, Beam 4(snr4)
• Azimuth of Beam 4 for WINDS data(azimuth4)
• Number of Values Required for Consensus, Beam 0(nrcns0)
• Number of spectra/ave int, Beam 2(nrec2)
• Signal to Noise Ratio, Beam 0(snr0)
• Azimuth of Beam 0 for WINDS data(azimuth0)
• Array of heights for each sample time(height_p)
• Number of Values Required for Consensus, Beam 1(nrcns1)
• Time offset of tweaks from base_time(time_offset)
• altitude above sea levelaltunits(alt)
• Azimuth of Beam 1 for WINDS data(azimuth1)
• Number of valid heights for each power(nheight)
• Oblique FFT Bandwidth(oband)
• Elevation angle of Beam 1 for WINDS data(elevation1)
• Number of Individual Spectra/Average Spectrum(nspc)
• Beam 0 radial wind speed(vel0)
• Oblique Velocity Spectral Resolution(ovsr)
• Number of values that passed consensus, beam 1(ncns1)
• Beam 4 radial wind speed(vel4)
• copolar signal to noise ratio(snr1)
• Number of Coherent Samples/spectral point(ncoh)
• Number of spectra/ave int, Beam 1(nrec1)
• Horizontal wind speed(spd)
• Elevation angle of Beam 2 for WINDS data(elevation2)
• model zonal wind velocity(u_wind)
• Vertical Velocity Spectral Resolution(vvsr)
• north latitude for all the input platforms.(lat)
• Number of values that passed consensus, beam 0(ncns0)
• model meridional wind velocity(v_wind)
• Height of Center of First Range Gate(rgf)
• Number of Values Required for Consensus, Beam 2(nrcns2)
• Interpulse Period(ipp)
• Number of spectra/ave int, Beam 0(nrec0)
• Number of spectra/ave int, Beam 4(nrec4)
• Beam 3 radial wind speed(vel3)
• Number of Pulse Code Bits(pcbits)
• Number of values that passed consensus, beam 4(ncns4)
• Signal to Noise Ratio, Beam 2(snr2)
• Elevation angle of Beam 3 for WINDS data(elevation3)
• Range Gate Spacing(rgs)
• Individual Spectrum Integration Time(sitime)
• Time offset from base_time(base_time)
• Height of Center of Last Range Gate(rgl)
• Number of Values Required for Consensus, Beam 3(nrcns3)
• Delay Time to 1st Gate(dly)
• Time Domain Integration Time(tditime)
• Vertical FFT Bandwidth(vband)
• Pulse Repetition Frequency(prf)
• Horizontal wind direction(dir)
• Azimuth of Beam 3 for WINDS data(azimuth3)
• Ave Time per Average Spectra. Also known as dwell.(spcavetim)
• Number of values that passed consensus, beam 3(ncns3)
• Beam 2 radial wind speed(vel2)
• Pulse Length(plen)
• Signal to Noise Ratio, Beam 3(snr3)
• Number of spectra/ave int, Beam 3(nrec3)

• JPG data stream - documentation not supported(JPEG data stream - documentation not yet available)

• north latitude for all the input platforms.(lat)
• altitude above sea levelaltunits(alt)
• Number of Values Required for Consensus, Beam 0(nrcns)
• Number of Values that Passed Consensus, Beam 0 Virtual Temperature(ncns_virtual_temp)
• Corrected Beam 0 Virtual Temperature(virtual_temp_corr)
• Time offset from base_time(base_time)
• east longitude for all the input platforms.(lon)
• Height of bins above ground level for the temperature, retrieved water vapor,
  and pressure profile(height)
• Signal to Noise Ratio, Corrected Beam 0 Virtual Temperature(snr_virtual_temp_corr)
• RASS virtual temperature (1st moment)(virtual_temp)
• Number of Values that Passed Consensus, Corrected Beam 0 Virtual Temperature(ncns_virtual_temp_corr)
• Number of Average Spectra/Average Int, Beam 0(nrec)
• Sample Rate(sampr)
• Vertical wind velocity(vert_v)
• Signal to Noise Ratio, Vertical wind velocity(snr_vert_v)
• Time offset of tweaks from base_time(time_offset)
• Signal to Noise Ratio, Beam 0 Virtual Temperature(snr_virtual_temp)
• Average Interval(avgint)
• Range Gate Spacing(rgs)
• Number of Values that Passed Consensus, Vertical wind velocity(ncns_vert_v)

• Individual Spectrum Integration Time(sitime)
• Time Domain Integration Time(tditime)
• Oblique FFT Bandwidth(oband)
• Vertical FFT Bandwidth(vband)
• Signal to Noise Ratio of the RASS Signal(snr)
• Number of valid heights for each power(nheight)
• Radial Velocity Spectral Resolution(vsr)
• Mean atmospheric vertical velocity(mdf)
• Height of Center of Last Range Gate(rgl)
• north latitude for all the input platforms.(lat)
• Number of Pulse Code Bits(pcbits)
• Beam Number(beam)
• Time offset of tweaks from base_time(time_offset)
• east longitude for all the input platforms.(lon)
• Number of Coherent Samples/spectral point(ncoh)
• Time offset from base_time(base_time)
• Number of Individual Spectra/Average Spectrum(nspc)
• Elevation angle of Beam 0(elevation)
• Rx bandwidth switch code(bswitch)
• Sample Rate(sampr)
• Delay Time to 1st Gate(dly)
• Range Gate Spacing(rgs)
• Array of heights for each sample time(height_t)
• 1000 * log10(noise signal level: vert vel)(noise)
• Pulse Repetition Frequency(prf)
• Spectral Width: vert velocity(specw)
• Height Index(range_gate)
• Pulse Length(plen)
• altitude above sea levelaltunits(alt)
• Ave Time per Average Spectra. Also known as dwell.(spcavetime)
• Height of Center of First Range Gate(rgf)
• Interpulse Period(ipp)

• Repetition rate, or Trigger Frequency of the laser(trigger_freq)
• Time offset from base_time(base_time)
• Amount of time the actual laser pulse lags behind the sync trigger(laser_sync_offset)
• Distance from leading edge of first range bin to the center of each bin .(range_bins)
• effective range offset due to poor sync between laser firing and A/D trigger.(range_offset)
• Preliminary cloud base height above ground level(preliminary_cbh)
• Laser temperature(laser_temp)
• Time offset from midnight of date of file. For CO data, this is identical to
  time_offset and is included for compatibility.(time)
• east longitude for all the input platforms.(lon)
• Angle of orientation with respect to true geographic north(transceiver_azimuth_angle)
• Number of laser pulses summed during measurement interval(shots_summed)
• Background signal(background_signal)
• value represents date when configuration is first applicable as YYYYMMDD(property)
• Repetition rate, or Trigger Frequency of the laser(pulse_rep)
• Detector temperature(detector_temp)
• altitude above sea levelaltunits(alt)
• Amount of time the scalar lags behind the sync trigger(scalar_sync_offset)
• Voltage level which operates the thermistor(voltage_10)
• Number of laser pulses summed during measurement interval(shots_sum)
• Time in nanoseconds for each range bin of multichannel scalar card.(range_bin_time)
• Filter temperature(filter_temp)
• Width of range-bins calculated from range_bin_time(range_bin_width)
• Voltage level which operates the A/D card and the detector(voltage_05)
• distance to center of range bin after correcting for offset in sync(range)
• Maximum altitude retrieved from multichannel scalar card.(max_altitude)
• Energy output per pulse of transmitted laser beam at 532 nm (Doubled Nd -YLF)(energy_monitor)
• Height of bins above ground level for the temperature, retrieved water vapor,
  and pressure profile(height)
• Voltage level which operates the energy monitor(voltage_15)
• Instrument temperature(instrument_temp)
• Angle of inclination with respect to horizontal(transceiver_altitude_angle)
• required to correct raw counts for detector deadtime prior to all other
  corrections.(deadtime_correction)
• Sum of raw backscatter counts per bin prior to ANY corrections.(total_counts)
• Time offset of tweaks from base_time(time_offset)
• Amount of time laser pulse lags behind the scalar trigger(laser_scalar_sync_offset)
• north latitude for all the input platforms.(lat)
• Aerosol volume backscattering coefficient at 355 nm(backscatter)

• Filter temperature(filter_temp)
• Time offset from midnight of date of file. For CO data, this is identical to
  time_offset and is included for compatibility.(time)
• Energy output per pulse of transmitted laser beam at 532 nm (Doubled Nd -YLF)(energy_monitor)
• Laser temperature(laser_temp)
• distance to center of range bin after correcting for offset in sync(range)
• Background signal(background_signal)
• Height of bins above ground level for the temperature, retrieved water vapor,
  and pressure profile(height)
• Preliminary cloud base height above ground level(preliminary_cbh)
• Maximum altitude retrieved from multichannel scalar card.(max_altitude)
• Time offset from base_time(base_time)
• Instrument temperature(instrument_temp)
• Voltage level which operates the A/D card and the detector(voltage_05)
• effective range offset due to poor sync between laser firing and A/D trigger.(range_offset)
• Time offset of tweaks from base_time(time_offset)
• east longitude for all the input platforms.(lon)
• Voltage level which operates the energy monitor(voltage_15)
• Attenuated backscatter(detector_counts)
• Voltage level which operates the thermistor(voltage_10)
• north latitude for all the input platforms.(lat)
• Detector temperature(detector_temp)
• Number of laser pulses summed during measurement interval(shots_summed)
• Time in nanoseconds for each range bin of multichannel scalar card.(range_bin_time)
• Repetition rate, or Trigger Frequency of the laser(pulse_rep)
• Width of range-bins calculated from range_bin_time(range_bin_width)
• altitude above sea levelaltunits(alt)
• Distance from leading edge of first range bin to the center of each bin .(range_bins)

• Expected root-mean-square error in precipitable water retrieval using only
  23.835 and 30.0 GHz(totalPrecipitableWater2RmsError)
• Flag indicating moisture sensor status(wetWindowFlag)
• Retrieved cloud liquid water content(liquidWaterContent)
• altitude above sea levelaltunits(alt)
• Cloud-base height, from Micropulse LIDAR or Belfort LIDAR ceilometer(cloudBaseHeight)
• Expected root-mean-square error in liquid water path retrieval using only 23.835
  and 30.0 GHz(liquidWaterPath2RmsError)
• Expected root-mean-square error in temperature retrieval(temperatureRmsError)
• Retrieved liquid water path using only 23.835 and 30.0 GHz(liquidWaterPath2)
• Surface absolute temperature at instrument(surfaceTemperature)
• Surface water vapor density at instrument(surfaceWaterVaporDensity)
• Lifting condensation level(liftingCondensationLevel)
• Interpolated dewpoint temperature(dewpointTemperature)
• Retrieved liquid water path(liquidWaterPath)
• Equilibrium level pressure(equilibriumLevelPres)
• Lifting condensation level pressure(liftingCondensationLevelPres)
• east longitude for all the input platforms.(lon)
• Retrieved total precipitable water vapor using only 23.835 and 30.0 GHz(totalPrecipitableWater2)
• Surface air temperature for last 5 minutes of previous hour(temperature)
• Expected root-mean-square error in water vapor density retrieval(waterVaporDensityRmsError)
• Retrieved water vapor density(waterVaporDensity)
• Time offset from midnight of date of file. For CO data, this is identical to
  time_offset and is included for compatibility.(time)
• Expected root-mean-square error in liquid water path retrieval(liquidWaterPathRmsError)
• Level of free convection pressure(levelFreeConvectionPres)
• Microwave brightness temperature(brightnessTemperature)
• Data quality flags(dataQualityFlags)
• Internal blackbody reference temperature(blackbodyTemperature)
• atmospheric pressure at mean sea level and at tropopause (NGM250 predicted)(pressure)
• Derived virtual temperature(virtualTemperature)
• Zenith-pointing infrared temperature at 10um(infraredTemperature)
• Total precipitable water vapor, from microwave radiometer(totalPrecipitableWater)
• Frequency(frequency)
• Time offset from base_time(base_time)
• Expected root-mean-square error in precipitable water retrieval(totalPrecipitableWaterRmsError)
• north latitude for all the input platforms.(lat)
• Convective available potential energy(cape)
• Expected root-mean-square error in liquid water content retrieval(liquidWaterContentRmsError)
• Level of free convection(levelFreeConvection)
• Surface pressure at instrument(surfacePressure)
• Height of bins above ground level for the temperature, retrieved water vapor,
  and pressure profile(height)
• Surface relative humidity at instrument(surfaceRelativeHumidity)
• Elevation angle of Beam 0(elevation)
• Time offset of tweaks from base_time(time_offset)
• Derived relative humidity(relativeHumidity)
• Solar azimuth referenced to the Central Facility.(azimuth)
• Equilibrium level(equilibriumLevel)
• Interpolated water vapor mixing ratio(waterVaporMixingRatio)

• Time offset of tweaks from base_time(time_offset)
• Spectral Data (signal strength/freq int)(spc_amp)
• altitude above sea levelaltunits(alt)
• east longitude for all the input platforms.(lon)
• Time offset from base_time(base_time)
• Sample Rate(sampr)
• Range Gate Spacing(rgs)
• Height of bins above ground level for the temperature, retrieved water vapor,
  and pressure profile(height)
• north latitude for all the input platforms.(lat)
• Particle radius at logarithmic center of bin(bins)

• Mean acoustic speed(smdf)
• altitude above sea levelaltunits(alt)
• east longitude for all the input platforms.(lon)
• Time offset from base_time(base_time)
• RASS virtual temperature (1st moment)(virtual_temp)
• Signal to Noise Ratio: acoustic(ssnr)
• Spectral Width: vert velocity(specw)
• Mean atmospheric vertical velocity(mdf)
• Sample Rate(sampr)
• Range Gate Spacing(rgs)
• Signal to Noise Ratio of the RASS Signal(snr)
• Height of bins above ground level for the temperature, retrieved water vapor,
  and pressure profile(height)
• 1000 * log10(noise signal level: vert vel)(noise)
• north latitude for all the input platforms.(lat)
• Acoustic Spectral Width(sspecw)
• Time offset of tweaks from base_time(time_offset)

• 40m Average QLI Reference Temperature(RefT40M_AVG)
• Standard Deviation of 10m Calculated Vapor Pressure(VP10M_STD)
• 15 minute Present Weather Code(PwCod15mi)
• Chilled Mirror Calculated Vapor Pressure(VPCMH)
• Chilled Mirror Temperature(CMHTemp)
• Standard Deviation of 40m Calculated Dew Point(DP40M_STD)
• 2m Arithmetic Mean Wind Speed(WS2M_S_WVT)
• 10m Vector Averaged Wind Speed(WS10M_U_WVT)
• east longitude for all the input platforms.(lon)
• north latitude for all the input platforms.(lat)
• 10m Arithmetic Mean Wind Speed(WS10M_S_WVT)
• 2m Average QLI Input Voltage(Volt2M_AVG)
• 2m Vector Averaged Wind Direction(WD2M_DU_WVT)
• 10m Average Relative Humidity(RH10M_AVG)
• Present Weather Sensor Alarm(PWSAlarm)
• altitude above sea levelaltunits(alt)
• 20m Average Relative Humidity(RH20M_AVG)
• 10m Average Calculated Vapor Pressure(VP10M_AVG)
• 1 minute Average Visibility(AvgVis1mi)
• Standard Deviation of Sonic Vector Averaged Wind Direction(SonicWD_SDU_WVT)
• 10m Average Temperature(T10M_AVG)
• Instant Present Weather Code(InstPwCod)
• Standard Deviation of 2m Relative Humidity(RH2M_STD)
• Standard Deviation of 10m Relative Humidity(RH10M_STD)
• Standard Deviation of 10m Temperature(T10M_STD)
• 40m Average Calculated Dew Point(DP40M_AVG)
• Standard Deviation of 2m Calculated Vapor Pressure(VP2M_STD)
• 1 hour Present Weather Code(PwCod1hr)
• Standard Deviation of 20m Relative Humidity(RH20M_STD)
• 40m Vector Averaged Wind Speed(WS40M_U_WVT)
• 10m Average Calculated Dew Point(DP10M_AVG)
• 20m Arithmetic Mean Wind Speed(WS20M_S_WVT)
• Standard Deviation of 20m Vector Averaged Wind Direction(WD20M_SDU_WVT)
• 2m Average Temperature(T2M_AVG)
• 2m Average Calculated Dew Point(DP2M_AVG)
• Cumulative Snow Sum(CumSnow)
• 20m Vector Averaged Wind Direction(WD20M_DU_WVT)
• 20m Average Calculated Dew Point(DP20M_AVG)
• Average X Component of Sonic Wind Speed(SonicX_AVG)
• 20m Average QLI Reference Temperature(RefT20M_AVG)
• Sonic Vector Averaged Wind Direction(SonicWD_DU_WVT)
• Standard Deviation of 2m Temperature(T2M_STD)
• Time offset from base_time(base_time)
• Standard Deviation of 10m Vector Averaged Wind Direction(WD10M_SDU_WVT)
• 10 minute Average Visibility(AvgVis10m)
• 2m Average Relative Humidity(RH2M_AVG)
• Standard Deviation of 10m Calculated Dew Point(DP10M_STD)
• Standard Deviation of 2m Vector Averaged Wind Direction(WD2M_SDU_WVT)
• 10m Average QLI Input Voltage(Volt10M_AVG)
• 20m Average Temperature(T20M_AVG)
• 40m Vector Averaged Wind Direction(WD40M_DU_WVT)
• Standard Deviation of 2m Calculated Dew Point(DP2M_STD)
• Cumulative Water Sum(CumH2O)
• 10m Average QLI Reference Temperature(RefT10m_AVG)
• 40m Average Relative Humidity(RH40M_AVG)
• 40m Arithmetic Mean Wind Speed(WS40M_S_WVT)
• 40m Average Temperature(T40M_AVG)
• Precipitation Rate(PcpRate)
• 10m Vector Averaged Wind Direction(WD10M_DU_WVT)
• Sonic Arithmetic Mean Wind Speed(SonicWS_S_WVT)
• 2m Average Calculated Vapor Pressure(VP2M_AVG)
• Average Y Component of Sonic Wind Speed(SonicY_AVG)
• Sonic Vector Averaged Wind Speed(SonicWS_U_WVT)
• Standard Deviation of 40m Temperature(T40M_STD)
• 20m Average Calculated Vapor Pressure(VP20M_AVG)
• 2m Vector Averaged Wind Speed(WS2M_U_WVT)
• Time offset of tweaks from base_time(time_offset)
• Time offset from midnight of date of file. For CO data, this is identical to
  time_offset and is included for compatibility.(time)
• 2m Average QLI Reference Temperature(RefT2M_AVG)
• Average Sonic Static Speed of Sound(SonicS_AVG)
• Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)
• Standard Deviation of 20m Calculated Vapor Pressure(VP20M_STD)
• Standard Deviation of 40m Relative Humidity(RH40M_STD)
• 20m Average QLI Input Voltage(Volt20M_AVG)
• Standard Deviation of 40m Vector Averaged Wind Direction(WD40M_SDU_WVT)
• Datalogger Battery Voltage(Batt_Volt)
• Standard Deviation of 20m Calculated Dew Point(DP20M_STD)
• 40m Average QLI Reference Voltage(Volt40M_AVG)
• Chilled Mirror Dew Point(CMHDP)
• 20m Vector Averaged Wind Speed(WS20M_U_WVT)
• 40m Average Calculated Vapor Pressure(VP40M_AVG)
• Standard Deviation of 20m Temperature(T20M_STD)
• Standard Deviation of 40m Calculated Vapor Pressure(VP40M_STD)
• Chilled Mirror Calculated Relative Humidity(CMHRH)
• Atmospheric Pressure(AtmPress)

• Imaginary radiance during sky view averaged over (700_705 cm-1)(skyViewImaginaryRadiance700_705)
• Weight factor for top used in calculating ambient blackbody temperature average(ABBtopTempWeight)
• Hot blackbody temperature - apex(HBBapexTemp)
• Interferometer window temperature measured on the outside of the aluminum window
  flange(interferometerWindowTemp)
• Resistive temperature of 97 Kohm fixed resistor located in SCE-P4 shell(fixed97KohmResistor)
• Shortwave window brightness temperature from radiance average (2510_2515 cm^-1)(shortwaveWindowAirTemp2510_2515)
• Coadditions count Number of complete(forward+backward) interferogram scans in a
  sample average.(coadditionsCount)
• Imaginary radiance during sky view averaged over (2282_2287 cm-1)(skyViewImaginaryRadiance2282_2287)
• Characteristic value representing overall longwave channel responsivity(LWresponsivity)
• Motor step value given to motor controller to achieve proper mirror positioning(sceneMirrorMotorStep)
• Radiance standard deviation during sky view averaged over (985_990 cm^-1)(skyViewStdDevRadiance985_990)
• Ambient air temperature at hatch opening(outsideAirTemp)
• Hot blackbody temperature - rim top(HBBtopTemp)
• Hatch status indicator, boolean with negative error conditions: 1:Open 0:Closed
  -1:Fault -2:Outside Valid Range -3:Neither Open Nor Closed(hatchOpen)
• Version number of Operational Software(systemReleaseNumber)
• Weight factor for bottom used in calculating ambient blackbody temperature
  average(ABBbottomTempWeight)
• Imaginary radiance during sky view averaged over (2295_2300 cm-1)(skyViewImaginaryRadiance2295_2300)
• Radiance standard deviation during ambient blackbody view averaged over (700_705
  cm-1)(ABBviewStdDevRadiance700_705)
• Logical flag indicating that a data record is missing (true/false)(missingDataFlag)
• Corrective offset for final hot blackbody average temperature(HBBtempOffset)
• Weight factor for top used in calculating hot blackbody temperature average(HBBtopTempWeight)
• Radiance standard deviation during ambient blackbody view averaged over (985_990
  cm-1)(ABBviewStdDevRadiance985_990)
• Logical flag indicating whether HBB temperature is stable (true) or not stable
  (false). Determined using HBBtempDrift and HBBtempDriftLimit.(HBBstable)
• Duration of scene view(sceneViewDuration)
• Ambient temperature used in calibration(calibrationAmbientTemp)
• Ambient air temperature near the interferometer(airNearInterferometerTemp)
• Scene mirror temperature as measured at the center of the back of the mirror(sceneMirrorTemp)
• Resistive temperature of 2500 Ohm fixed resistor - banana plug mounted(fixed2500ohmResistor)
• Longwave window radiance average (985_990 cm^-1)(longwaveWindowRadiance985_990)
• The noise equivalent radiance observed in the longwave channel during a sky view
  at 1000 cm^-1(LWskyNEN)
• Rain sensor analog output: the rain sensor is located inside the hatch near the
  sky aperture and is used to flag the critical condition of rain falling on
  the AERI s(rainSensorIntensity)
• Imaginary radiance during sky view averaged over (2510_2515 cm-1)(skyViewImaginaryRadiance2510_2515)
• Shortwave radiance average (2295_2300 cm^-1) Surface Air(surfaceLayerRadiance2295_2300)
• Shortwave radiance average (2282_2287 cm^-1) Elevated Air(elevatedLayerRadiance2282_2287)
• Scene Mirror Position Count Number of viewers in a sequence(sceneMirPosCount)
• Noise-equivalent Radiance in Hot Blackbody at 1000 cm-1(LW_HBB_NEN)
• Temperature of the AERI blackbody support structure(BBsupportStructureTemp)
• Maximum departure from ideal of the mirror position over the course of all
  contributing views. Typically two hot, two ambient, and one scene view are
  examine(sceneMirPosEncoderMaxDrift)
• Longwave elevated air brightness temperature from radiance average (700_705
  cm^-1)(elevatedLayerAirTemp700_705)
• Observation longitude(Longitude)
• Radiance standard deviation during hot blackbody view averaged over (700_705
  cm-1)(HBBviewStdDevRadiance700_705)
• Laser wavenumber used in definition of output wavenumber scale(outputLaserWavenumber)
• Imaginary radiance during sky view averaged over (675_680 cm-1)(skyViewImaginaryRadiance675_680)
• Longwave window brightness temperature from radiance average (985_990 cm^-1)(longwaveWindowAirTemp985_990)
• Characteristic value representing overall shortwave channel responsivity(SWresponsivity)
• Sun sensor analog output: The sun sensor has a view angle to the sky slightly
  larger than the interferometer FOV and is aligned to the interferometer
  line-of-sight. I(sunSensorIntensity)
• Detector temperature sensed via diode near detector(detectorTemp)
• Radiance standard deviation during ambient blackbody view averaged over
  (2295_2300 cm-1)(ABBviewStdDevRadiance2295_2300)
• Radiance standard deviation during sky view averaged over (2510_2515 cm^-1)(skyViewStdDevRadiance2510_2515)
• Maximum Temperature Difference Between ABB Thermistors(ABBmaxTempDiff)
• Interferometer front end fan airflow unheated temperature: used with heated
  temperature as measure of airflow.(frontEndFanAirUnheatedTemp)
• Relative humidity measured near Blackbodies. Use with Air Temperature Near BBs
  only.(atmosphericRelativeHumidity)
• Limit applied to LWskyNEN in determination of LWskyNENacceptable(LWskyNENlimit)
• Scene mirror motor driver heat sink temperature(motorDriverTemp)
• Radiance standard deviation during hot blackbody view averaged over (675_680
  cm-1)(HBBviewStdDevRadiance675_680)
• Shortwave surface air brightness temperature from radiance average (2295_2300
  cm^-1)(surfaceLayerAirTemp2295_2300)
• Longwave radiance average (675-680 cm^-1) Surface Air(surfaceLayerRadiance675_680)
• Factor used to convert single-scan noise to two-minute equivalent(twoMinuteNoiseEstimateFactor)
• Observation date(dateYYMMDD)
• Radiance standard deviation during sky view averaged over (700_705 cm^-1)(skyViewStdDevRadiance700_705)
• Blackbody controller Unit 2 power supply temperature(BBcontroller2temp)
• Stirling cooler compressor temperature measured at compressor heatsink(coolerCompressorTemp)
• Size of buffer holding initial spectrum(originalInterferogramSize)
• Time at center of AERI sky observation period(timeHHMMSS)
• Longwave radiance average (700_705 cm^-1) Elevated Air(elevatedLayerRadiance700_705)
• Radiance standard deviation during ambient blackbody view averaged over
  (2510_2515 cm-1)(ABBviewStdDevRadiance2510_2515)
• Size of buffer holding expanded spectrum before interpolation(expandedInterferogramSize)
• Radiance standard deviation during ambient blackbody view averaged over
  (2282_2287 cm-1)(ABBviewStdDevRadiance2282_2287)
• Weight factor for apex used in calculating hot blackbody temperature average(HBBapexTempWeight)
• Original laser wavenumber assumed for this instrument(originalLaserWavenumber)
• Signal conditioning electronics inside air temperature(SCEtemp)
• The maximum excursion of hot-blackbody temperature over 5 consecutive scenes,
  centered on the sky view(HBBtempDrift)
• Limit applied to HBBtempDrift in determination of HBBstable flag(HBBtempDriftLimit)
• Radiance standard deviation during sky view averaged over (2295_2300 cm^-1)(skyViewStdDevRadiance2295_2300)
• Scene mirror motor case temperature(mirrorMotorTemp)
• The noise equivalent radiance observed in the shortwave channel during a sky
  view at 2500 cm^-1(SWskyNEN)
• Logical flag indicating whether longwave channel noise equivalent radiance is
  acceptable in sky view (true/false). Determined using LWskyNEN and
  LWskyNENlimit.(LWskyNENacceptable)
• Cold blackbody temperature used in calibration(calibrationCBBtemp)
• Shortwave elevated air brightness temperature from radiance average (2282_2287
  cm^-1)(elevatedLayerAirTemp2282_2287)
• Character string containing instrument name(instrumentUnitNumber)
• Time at center of AERI sky observation period(Time_UTC_hours)
• Spare temperature sensor (location TBD)(spareTemp)
• Radiance standard deviation during sky view averaged over (2282_2287 cm^-1)(skyViewStdDevRadiance2282_2287)
• Radiance standard deviation during hot blackbody view averaged over (2510_2515
  cm-1)(HBBviewStdDevRadiance2510_2515)
• Field of view half angle used in finite FOV correction(FFOVhalfAngle)
• Julian Day including day and fraction of day(JulianDay)
• Radiance standard deviation during hot blackbody view averaged over (2282_2287
  cm-1)(HBBviewStdDevRadiance2282_2287)
• Stirling cycle cooler expander temperature(coolerExpanderTemp)
• Ambient air temperature near blackbodies(airNearBBsTemp)
• Logical flag indicating whether shortwave channel noise equivalent radiance is
  acceptable in sky view (true/false). Determined using SWskyNEN and
  SWskyNENlimit.(SWskyNENacceptable)
• Blackbody controller Unit 1 power supply temperature(BBcontroller1temp)
• Observation atmospheric pressure in AERI electronics(atmosphericPressure)
• north latitude for all the input platforms.(lat)
• Interferometer front end fan airflow heated temperature: used with unheated
  temperature as measure of airflow.(frontEndFanAirHeatedTemp)
• Stirling cooler power supply temperature measured at power supply frame(coolerPowerSupplyTemp)
• Difference between frontEndFanAirHeatedTemp and frontEndFanAirUnheatedTemp
  indicative of front end air flow.(frontEndFanAirTempDiff)
• Weight factor for apex used in calculating ambient blackbody temperature average(ABBapexTempWeight)
• Scene mirror view angle in non-negative degrees, measured clockwise looking into
  interferometer window.(sceneMirrorAngle)
• Hot blackbody temperature - rim bottom(HBBbottomTemp)
• Relative Humidity measured in the Interferometer Enclosure(interferometerEnclosureRelativeHumidity)
• Observation Altitude(Altitude)
• Blackbody cavity geometry factor(BBcavityFactor)
• Resistive temperature of 12 Kohm fixed resistor located in SCE-P3 shell(fixed12KohmResistor)
• AERI instrument data channel number(channelNumber)
• AERI instrument unit serial number(AERIunitNumber)
• Time offset from midnight of date of file. For CO data, this is identical to
  time_offset and is included for compatibility.(time)
• Noise-equivalent Radiance in Hot Blackbody at 2500 cm-1(SW_HBB_NEN)
• Electronics rack ambient temperature measured at inside top of rack(rackAmbientTemp)
• Type of scene that has been calibrated (ASCII character as float)(calibratedSceneID)
• Difference between actual and ideal motor encoder values for current view
  indicative of quality of the mirror positioning.(sceneMirPosEncoderDrift)
• east longitude for all the input platforms.(lon)
• Radiance standard deviation during ambient blackbody view averaged over (675_680
  cm-1)(ABBviewStdDevRadiance675_680)
• AERI interferometer temperature at second port(interferometerSecondPortTemp)
• Limit applied to SWskyNEN in determination of SWskyNENacceptable(SWskyNENlimit)
• Imaginary radiance during sky view averaged over (985_990 cm-1)(skyViewImaginaryRadiance985_990)
• Logical flag indicating whether any data is available at current time
  (true/false)(dataAvailable)
• Time offset from base_time(base_time)
• altitude above sea levelaltunits(alt)
• Radiance standard deviation during sky view averaged over (675_680 cm^-1)(skyViewStdDevRadiance675_680)
• Maximum Temperature Difference Between HBB Thermistors(HBBmaxTempDiff)
• Number of terms used in finite field of view correction(numberOfTerms)
• Ambient blackbody temperature(ABBbottomTemp)
• Hot blackbody temperature used in calibration(calibrationHBBtemp)
• Weight factor for bottom used in calculating hot blackbody temperature average(HBBbottomTempWeight)
• Longwave surface air brightness temperature from radiance average (675_680
  cm^-1)(surfaceLayerAirTemp675_680)
• Shortwave window radiance average (2510_2515 cm^-1)(shortwaveWindowRadiance2510_2515)
• Corrective offset for final ambient blackbody average temperature(ABBtempOffset)
• Scene mirror position encoder value(sceneMirPosEncoder)
• Time offset of tweaks from base_time(time_offset)
• Ambient blackbody temperature - apex(ABBapexTemp)
• Radiance standard deviation during hot blackbody view averaged over (2295_2300
  cm-1)(HBBviewStdDevRadiance2295_2300)
• Observation latitude(Latitude)
• Ambient blackbody temperature - rim top(ABBtopTemp)
• Maximum Standard Deviation in Thermistor Channels 0..7(maxSampleStdDev)
• Stirling cycle cooler current(coolerCurrent)
• Radiance standard deviation during hot blackbody view averaged over (985_990
  cm-1)(HBBviewStdDevRadiance985_990)
• Instrument scene mirror position identifier(sceneMirrorPosition)
• AERI ingest computer temperature measured at back panel of computer(computerTemp)
• Relative humidity measured in the optics compartment atop the interferometer.(opticsCompartmentRelativeHumidity)

• north latitude for all the input platforms.(lat)
• Relative humidity measured near Blackbodies. Use with Air Temperature Near BBs
  only.(atmosphericRelativeHumidity)
• Maximum departure from ideal of the mirror position over the course of all
  contributing views. Typically two hot, two ambient, and one scene view are
  examine(sceneMirPosEncoderMaxDrift)
• Scene mirror view angle in non-negative degrees, measured clockwise looking into
  interferometer window.(sceneMirrorAngle)
• Julian Day including day and fraction of day(JulianDay)
• wavenumbers for standard deviation of radiance spectra(wnum2)
• east longitude for all the input platforms.(lon)
• Cold blackbody temperature used in calibration(calibrationCBBtemp)
• AERI instrument unit serial number(AERIunitNumber)
• Observation latitude(Latitude)
• Character string containing instrument name(instrumentUnitNumber)
• Time at center of AERI sky observation period(Time_UTC_hours)
• Version number of Operational Software(systemReleaseNumber)
• Difference between the sky view\'s radiance variance and the hot black body
  view\'s variance(standard_dev_mean_rad)
• Type of scene that has been calibrated (ASCII character as float)(calibratedSceneID)
• Hatch status indicator, boolean with negative error conditions: 1:Open 0:Closed
  -1:Fault -2:Outside Valid Range -3:Neither Open Nor Closed(hatchOpen)
• Hot blackbody temperature used in calibration(calibrationHBBtemp)
• Time offset of tweaks from base_time(time_offset)
• Time offset from base_time(base_time)
• Ambient temperature used in calibration(calibrationAmbientTemp)
• AERI instrument data channel number(channelNumber)
• Observation Altitude(Altitude)
• Logical flag indicating that a data record is missing (true/false)(missingDataFlag)
• wavenumbers for mean radiance spectra(wnum)
• Ambient air temperature at hatch opening(outsideAirTemp)
• Time at center of AERI sky observation period(timeHHMMSS)
• altitude above sea levelaltunits(alt)
• Temperature of the AERI blackbody support structure(BBsupportStructureTemp)
• Time offset from midnight of date of file. For CO data, this is identical to
  time_offset and is included for compatibility.(time)
• Downwelling radiance interpolated to standard wavenumber scale(mean_rad)
• Duration of scene view(sceneViewDuration)
• Observation longitude(Longitude)
• Observation atmospheric pressure in AERI electronics(atmosphericPressure)
• Observation date(dateYYMMDD)

• AERI LW Responsivity Spectral Averages (Ch1)(ResponsivitySpectralAveragesCh1)
• Time at center of AERI sky observation period(timeHHMMSS)
• Longwave window brightness temperature from radiance average (985_990 cm^-1)(longwaveWindowAirTemp985_990)
• Shortwave surface air brightness temperature from radiance average (2295_2300
  cm^-1)(surfaceLayerAirTemp2295_2300)
• AERI SW Scene NESR Spectral Averages (Ch2)(SkyNENCh2)
• Averaged Wave number in inverse centimeters(wnumsum3)
• Longwave elevated air brightness temperature from radiance average (700_705
  cm^-1)(elevatedLayerAirTemp700_705)
• Logical flag indicating whether longwave channel noise equivalent radiance is
  acceptable in sky view (true/false). Determined using LWskyNEN and
  LWskyNENlimit.(LWskyNENacceptable)
• Characteristic value representing overall longwave channel responsivity(LWresponsivity)
• Time offset of tweaks from base_time(time_offset)
• AERI LW Scene Brightness Temp Spectral Averages (Ch1)(SkyBrightnessTempSpectralAveragesCh1)
• Longwave radiance average (700_705 cm^-1) Elevated Air(elevatedLayerRadiance700_705)
• north latitude for all the input platforms.(lat)
• Averaged Wave number in inverse centimeters(wnumsum7)
• Difference between actual and ideal motor encoder values for current view
  indicative of quality of the mirror positioning.(sceneMirPosEncoderDrift)
• Maximum Temperature Difference Between HBB Thermistors(HBBmaxTempDiff)
• Averaged Wave number in inverse centimeters(wnumsum6)
• Cold blackbody temperature used in calibration(calibrationCBBtemp)
• The noise equivalent radiance observed in the longwave channel during a sky view
  at 1000 cm^-1(LWskyNEN)
• Averaged Wave number in inverse centimeters(wnumsum13)
• Radiance standard deviation during sky view averaged over (675_680 cm^-1)(skyViewStdDevRadiance675_680)
• Observation longitude(Longitude)
• Logical flag indicating whether any data is available at current time
  (true/false)(dataAvailable)
• AERI LW Scene NESR Spectral Averages (Ch1)(SkyNENCh1)
• Radiance standard deviation during sky view averaged over (2282_2287 cm^-1)(skyViewStdDevRadiance2282_2287)
• Averaged Wave number in inverse centimeters(wnumsum2)
• Observation latitude(Latitude)
• Longwave window radiance average (985_990 cm^-1)(longwaveWindowRadiance985_990)
• Shortwave radiance average (2295_2300 cm^-1) Surface Air(surfaceLayerRadiance2295_2300)
• AERI SW Scene Radiance Spectral Averages (Ch2)(SkyRadianceSpectralAveragesCh2)
• Characteristic value representing overall shortwave channel responsivity(SWresponsivity)
• Type of scene that has been calibrated (ASCII character as float)(calibratedSceneID)
• Longwave radiance average (675-680 cm^-1) Surface Air(surfaceLayerRadiance675_680)
• AERI SW HBB 2min NESR Estimate #1 derived from variance during HBB view (Ch2)(HBB2minNENestimateNo1Ch2)
• Noise-equivalent Radiance in Hot Blackbody at 2500 cm-1(SW_HBB_NEN)
• Rain sensor analog output: the rain sensor is located inside the hatch near the
  sky aperture and is used to flag the critical condition of rain falling on
  the AERI s(rainSensorIntensity)
• Averaged Wave number in inverse centimeters(wnumsum12)
• Time offset from midnight of date of file. For CO data, this is identical to
  time_offset and is included for compatibility.(time)
• Averaged Wave number in inverse centimeters(wnumsum1)
• Shortwave window radiance average (2510_2515 cm^-1)(shortwaveWindowRadiance2510_2515)
• Radiance standard deviation during sky view averaged over (985_990 cm^-1)(skyViewStdDevRadiance985_990)
• AERI instrument data channel number(channelNumber)
• Averaged Wave number in inverse centimeters(wnumsum9)
• Ambient air temperature at hatch opening(outsideAirTemp)
• The maximum excursion of hot-blackbody temperature over 5 consecutive scenes,
  centered on the sky view(HBBtempDrift)
• Relative humidity measured near Blackbodies. Use with Air Temperature Near BBs
  only.(atmosphericRelativeHumidity)
• Scene mirror view angle in non-negative degrees, measured clockwise looking into
  interferometer window.(sceneMirrorAngle)
• Shortwave elevated air brightness temperature from radiance average (2282_2287
  cm^-1)(elevatedLayerAirTemp2282_2287)
• Julian Day including day and fraction of day(JulianDay)
• Radiance standard deviation during sky view averaged over (700_705 cm^-1)(skyViewStdDevRadiance700_705)
• AERI LW Scene Variability Spectral Averages (Ch1)(SkyUniformityCh1)
• Logical flag indicating that a data record is missing (true/false)(missingDataFlag)
• Difference between frontEndFanAirHeatedTemp and frontEndFanAirUnheatedTemp
  indicative of front end air flow.(frontEndFanAirTempDiff)
• Hot blackbody temperature used in calibration(calibrationHBBtemp)
• Ambient temperature used in calibration(calibrationAmbientTemp)
• Time offset from base_time(base_time)
• Longwave surface air brightness temperature from radiance average (675_680
  cm^-1)(surfaceLayerAirTemp675_680)
• Averaged Wave number in inverse centimeters(wnumsum5)
• AERI SW Scene Variability Spectral Averages (Ch2)(SkyUniformityCh2)
• AERI LW HBB 2min NESR Estimate #1 derived from variance during HBB view (Ch1)(HBB2minNENestimateNo1Ch1)
• AERI SW HBB 2min NESR Estimate #2 derived from sequential HBB views (Ch2)(HBB2minNENestimateNo2Ch2)
• Logical flag indicating whether HBB temperature is stable (true) or not stable
  (false). Determined using HBBtempDrift and HBBtempDriftLimit.(HBBstable)
• AERI instrument unit serial number(AERIunitNumber)
• Observation atmospheric pressure in AERI electronics(atmosphericPressure)
• Radiance standard deviation during sky view averaged over (2510_2515 cm^-1)(skyViewStdDevRadiance2510_2515)
• Noise-equivalent Radiance in Hot Blackbody at 1000 cm-1(LW_HBB_NEN)
• Observation date(dateYYMMDD)
• Sun sensor analog output: The sun sensor has a view angle to the sky slightly
  larger than the interferometer FOV and is aligned to the interferometer
  line-of-sight. I(sunSensorIntensity)
• Version number of Operational Software(systemReleaseNumber)
• Logical flag indicating whether shortwave channel noise equivalent radiance is
  acceptable in sky view (true/false). Determined using SWskyNEN and
  SWskyNENlimit.(SWskyNENacceptable)
• Maximum departure from ideal of the mirror position over the course of all
  contributing views. Typically two hot, two ambient, and one scene view are
  examine(sceneMirPosEncoderMaxDrift)
• AERI LW Scene Radiance Spectral Averages (Ch1)(SkyRadianceSpectralAveragesCh1)
• Averaged Wave number in inverse centimeters(wnumsum11)
• The noise equivalent radiance observed in the shortwave channel during a sky
  view at 2500 cm^-1(SWskyNEN)
• east longitude for all the input platforms.(lon)
• Observation Altitude(Altitude)
• AERI SW Responsivity Spectral Averages (Ch2)(ResponsivitySpectralAveragesCh2)
• Maximum Temperature Difference Between ABB Thermistors(ABBmaxTempDiff)
• Maximum Standard Deviation in Thermistor Channels 0..7(maxSampleStdDev)
• Averaged Wave number in inverse centimeters(wnumsum4)
• Duration of scene view(sceneViewDuration)
• Averaged Wave number in inverse centimeters(wnumsum8)
• AERI LW HBB 2min NESR Estimate #2 derived from sequential HBB views (Ch1)(HBB2minNENestimateNo2Ch1)
• altitude above sea levelaltunits(alt)
• Shortwave radiance average (2282_2287 cm^-1) Elevated Air(elevatedLayerRadiance2282_2287)
• Hatch status indicator, boolean with negative error conditions: 1:Open 0:Closed
  -1:Fault -2:Outside Valid Range -3:Neither Open Nor Closed(hatchOpen)
• AERI SW Scene Brightness Temp Spectral Averages (Ch2)(SkyBrightnessTempSpectralAveragesCh2)
• Averaged Wave number in inverse centimeters(wnumsum14)
• Shortwave window brightness temperature from radiance average (2510_2515 cm^-1)(shortwaveWindowAirTemp2510_2515)
• Averaged Wave number in inverse centimeters(wnumsum10)
• Time at center of AERI sky observation period(Time_UTC_hours)
• Radiance standard deviation during sky view averaged over (2295_2300 cm^-1)(skyViewStdDevRadiance2295_2300)
• Character string containing instrument name(instrumentUnitNumber)

• Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
• 23.8 GHz Blackbody signal(bb23)
• 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)
• 31.4 GHz goodness-of-fit coefficient(r31)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Noise diode mount temperature(tknd)
• Actual Azimuth(actaz)
• Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
• Blackbody kinetic temperature(tkbb)
• Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Time offset from base_time(base_time)
• 23.8 GHz goodness-of-fit coefficient(r23)
• 31.4 GHz Blackbody signal(bb31)
• Mixer kinetic (physical) temperature(tkxc)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
• east longitude for all the input platforms.(lon)
• altitude above sea levelaltunits(alt)
• 31.4 GHz sky signal(tipsky31)
• 31.4 GHz blackbody+noise injection signal(bbn31)
• Actual elevation angle(actel)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• 31.8 GHz sky brightness temperature derived from tip curve(tbskytip31)
• 23.8 GHz sky signal(tipsky23)
• Ambient temperature(tkair)
• north latitude for all the input platforms.(lat)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• Time offset of tweaks from base_time(time_offset)

• Percentage of nominal factory setting (0 to 999%)(receiver_sensitivity)
• Third cloud base height(third_cbh)
• Time offset of tweaks from base_time(time_offset)
• altitude above sea levelaltunits(alt)
• Flag indicating aeri retrieval status(status_flag)
• Aerosol volume backscattering coefficient at 355 nm(backscatter)
• Millivolts at internal ADC input (0 to 2500)(background_light)
• distance to center of range bin after correcting for offset in sync(range)
• Vertical visibility(vertical_visibility)
• east longitude for all the input platforms.(lon)
• Degrees from vertical (-15 to +90)(tilt_angle)
• Altitude of highest signal(alt_highest_signal)
• Lowest cloud base height detected.(first_cbh)
• SUM of detected and normalized backscatter(sum_backscatter)
• north latitude for all the input platforms.(lat)
• Percentage of nominal factory setting (0 to 999%)(laser_pulse_energy)
• Detection status. See details(detection_status)
• Warning and alarm status bits(status_string)
• 6 character string describing instrument measurement parameters(measurement_parameters)
• Time offset from base_time(base_time)
• Second lowest cloud base height(second_cbh)
• Laser temperature(laser_temperature)
• GPS raw data filename(filename)
• Millivolts at internal ADC input(window_contamination)

• Number of valid heights for each power(nheight)
• Rx bandwidth switch code(bswitch)
• Range Gate Spacing(rgs)
• Ave Time per Average Spectra. Also known as dwell.(spcavetim)
• Delay Time to 1st Gate(dly)
• Elevation angle of Beam 0(elevation)
• Spectral Data (signal strength/freq int)(spc_amp)
• Interpulse Period(ipp)
• Radial Velocity Spectral Resolution(vsr)
• east longitude for all the input platforms.(lon)
• Height of Center of Last Range Gate(rgl)
• Time offset of tweaks from base_time(time_offset)
• Time Domain Integration Time(tditime)
• Time offset from base_time(base_time)
• Vertical FFT Bandwidth(vband)
• Sample Rate(sampr)
• Height of Center of First Range Gate(rgf)
• altitude above sea levelaltunits(alt)
• Pulse Repetition Frequency(prf)
• Array of heights for each sample time(height_t)
• Oblique FFT Bandwidth(oband)
• Number of Pulse Code Bits(pcbits)
• Number of Coherent Samples/spectral point(ncoh)
• Number of Individual Spectra/Average Spectrum(nspc)
• Individual Spectrum Integration Time(sitime)
• Particle radius at logarithmic center of bin(bins)
• Height Index(range_gate)
• north latitude for all the input platforms.(lat)
• Beam Number(beam)
• Pulse Length(plen)

• Mean IR brightness temperature(ir_temp)
• Ambient temperature(tkair)
• Mean total water vapor amount along LOS path(vap)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• 23.8 GHz sky signal(sky23)
• Mean 23.8 GHz sky brightness temperature(tbsky23)
• Mean 31.4 GHz sky brightness temperature(tbsky31)
• Time offset from base_time(base_time)
• Blackbody kinetic temperature(tkbb)
• Temperature correction coefficient at 23.8 GHz(tc23)
• 31.4 GHz Blackbody signal(bb31)
• 31.4 GHz sky signal(sky31)
• altitude above sea levelaltunits(alt)
• Noise diode mount temperature(tknd)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Actual Azimuth(actaz)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• 23.8 GHz Blackbody signal(bb23)
• 31.4 GHz blackbody+noise injection signal(bbn31)
• Time offset of tweaks from base_time(time_offset)
• east longitude for all the input platforms.(lon)
• Mean total liquid water amount along LOS path(liq)
• north latitude for all the input platforms.(lat)
• Mixer kinetic (physical) temperature(tkxc)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Actual elevation angle(actel)
• Sky/Cloud Infra-Red Temperature(sky_ir_temp)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• Temperature correction coefficient at 31.4 GHz(tc31)

• wavenumbers for mean radiance spectra(wnum)
• Logical flag indicating that a data record is missing (true/false)(missingDataFlag)
• Ambient air temperature at hatch opening(outsideAirTemp)
• Time offset of tweaks from base_time(time_offset)
• Version number of Operational Software(systemReleaseNumber)
• Ambient temperature used in calibration(calibrationAmbientTemp)
• Maximum departure from ideal of the mirror position over the course of all
  contributing views. Typically two hot, two ambient, and one scene view are
  examine(sceneMirPosEncoderMaxDrift)
• Time at center of AERI sky observation period(Time_UTC_hours)
• Hot blackbody temperature used in calibration(calibrationHBBtemp)
• Time offset from midnight of date of file. For CO data, this is identical to
  time_offset and is included for compatibility.(time)
• Time offset from base_time(base_time)
• Hatch status indicator, boolean with negative error conditions: 1:Open 0:Closed
  -1:Fault -2:Outside Valid Range -3:Neither Open Nor Closed(hatchOpen)
• Type of scene that has been calibrated (ASCII character as float)(calibratedSceneID)
• Observation atmospheric pressure in AERI electronics(atmosphericPressure)
• wavenumbers for standard deviation of radiance spectra(wnum2)
• altitude above sea levelaltunits(alt)
• Time at center of AERI sky observation period(timeHHMMSS)
• east longitude for all the input platforms.(lon)
• Cold blackbody temperature used in calibration(calibrationCBBtemp)
• Temperature of the AERI blackbody support structure(BBsupportStructureTemp)
• Observation longitude(Longitude)
• Character string containing instrument name(instrumentUnitNumber)
• AERI instrument data channel number(channelNumber)
• Observation Altitude(Altitude)
• Relative humidity measured near Blackbodies. Use with Air Temperature Near BBs
  only.(atmosphericRelativeHumidity)
• AERI instrument unit serial number(AERIunitNumber)
• Julian Day including day and fraction of day(JulianDay)
• north latitude for all the input platforms.(lat)
• Downwelling radiance interpolated to standard wavenumber scale(mean_rad)
• Difference between the sky view\'s radiance variance and the hot black body
  view\'s variance(standard_dev_mean_rad)
• Scene mirror view angle in non-negative degrees, measured clockwise looking into
  interferometer window.(sceneMirrorAngle)
• Observation date(dateYYMMDD)
• Duration of scene view(sceneViewDuration)
• Observation latitude(Latitude)

• Delay to First Range Gate(StartGateDelay)
• Time offset of tweaks from base_time(time_offset)
• Receiver Cal Time Stamp(RxCalTimeStamp)
• Number of Coherent Integrations(NumCoherentIntegrations)
• Max. height of clutter removal(ClutterHeight)
• Circular Depolarization Ratio(CircularDepolarizationRatio)
• DC Filtering ON-OFF Status(DCFilterONOFF)
• Average Noise Level (S/N<0)(AvgNoiseLevel)
• Pulse Width(PulseWidth)
• Current Receiver Number(ReceiverNumber)
• Receiver Gain(RxGain)
• RadarWaveLength(m) / [4 * InterPulsePeriod(s) * NumCoherentIntegrations](NyquistVelocity)
• Windowing ON-OFF Status(WindowingONOFF)
• MMCR Spectral Width(SpectralWidth)
• Time Spacing Between Gates(GateSpacing)
• Mean Noise Level(NoiseLevel)
• Receiver 290K Level(Rx290KLevel)
• Number of Receiver(NumReceivers)
• Minimum detectable reflectivity(MinimumDetectableReflectivity)
• TWT Status Code, details forthcoming from MMCR vendor(TWTStatusCode)
• MMCR Reflectivity(Reflectivity)
• Receiver Cal Check Level(CalCheckLevel)
• Receiver Cal Check Time Stamp(CalCheckTime)
• Number of Code Bits(NumCodeBits)
• east longitude for all the input platforms.(lon)
• Inter-Pulse Period(InterPulsePeriod)
• Range Corrected Calibrated Power(RangeCorrectedPower)
• altitude above sea levelaltunits(alt)
• Receiver Sky Noise(SkyNoiseLevel)
• Time associated with hourly averaged values(TimeAvg)
• Data Quality Status(DataQualityStatus)
• north latitude for all the input platforms.(lat)
• Operating Set for this Record(ModeNum)
• Radar Constant(RadarConstant)
• radar mode char identifier(ModeDescription)
• Power (uncalibrated)(Power)
• Receiver Mode(ReceiverMode)
• Number of Spectral Averages(NumSpectralAverages)
• MMCR Mean Doppler Velocity(MeanDopplerVelocity)
• Time offset from base_time(base_time)
• Number of Gate Heights(NumHeights)
• Number of Points in FFT(NumFFT)
• Range Heights (center of radar sample volume)(heights)
• Peak tranmitted power, averaged over the course of the hour(PeakTransmittedPowerAvg)
• Time offset from midnight of date of file. For CO data, this is identical to
  time_offset and is included for compatibility.(time)
• Signal to noise ratio(SignalToNoiseRatio)

NSA/METTWR/C1 - CMH data intermittently poor

CMH aspirator fan intermittently failed causing higher than actual 
             temperature and dew point readings.

• Chilled Mirror Calculated Vapor Pressure(VPCMH)
• Chilled Mirror Calculated Relative Humidity(CMHRH)
• Chilled Mirror Dew Point(CMHDP)
• Chilled Mirror Temperature(CMHTemp)
• Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)

NSA/METTWR/C1 - Incorrect Maximum for Precip Values

The max values for cumulative rain sum of 99 mm and the rain rate of 999 mm/hr are 
incorrect.  In communication with the manufacturer it has been found that the manual was in 
error.  The actual max values of the cumulative rain sum is 99.99 mm and the rain rate is 
999.99 mm/hr.

• Precipitation Rate(PcpRate)
• Cumulative Water Sum(CumH2O)

NSA/METTWR/C1 - CMH mirror dirty

The CMH mirror was in need of cleaning.  The data is suspect from 05/28/05 through 
07/04/05 as intermittently poor readings occurred.  After 07/04/05 the data was incorrect as the 
mirror was excessively dirty.

• Chilled Mirror Calculated Vapor Pressure(VPCMH)
• Chilled Mirror Calculated Relative Humidity(CMHRH)
• Chilled Mirror Dew Point(CMHDP)
• Chilled Mirror Temperature(CMHTemp)
• Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)

NSA/METTWR/C1 - Tower Maintenance

The booms of the tower were lowered for sensor replacement, calibration, and tower 
maintenance.  During the maintenance and sensor replacement data are frequently missing.  Where 
data are available, they are not or may not be representative because the booms were at 
the base of the tower during the time period listed.

The chilled mirror measurements were not affected by the maintenance.

• Standard Deviation of 40m Temperature(T40M_STD)
• 15 minute Present Weather Code(PwCod15mi)
• 20m Average Temperature(T20M_AVG)
• Sonic Arithmetic Mean Wind Speed(SonicWS_S_WVT)
• 40m Vector Averaged Wind Direction(WD40M_DU_WVT)
• 20m Average Relative Humidity(RH20M_AVG)
• Sonic Vector Averaged Wind Direction(SonicWD_DU_WVT)
• 2m Average Temperature(T2M_AVG)
• Standard Deviation of 20m Temperature(T20M_STD)
• 2m Average Calculated Dew Point(DP2M_AVG)
• 10m Average Calculated Vapor Pressure(VP10M_AVG)
• 20m Average Calculated Vapor Pressure(VP20M_AVG)
• Average Sonic Static Speed of Sound(SonicS_AVG)
• Cumulative Water Sum(CumH2O)
• 40m Average QLI Reference Temperature(RefT40M_AVG)
• Standard Deviation of 20m Calculated Dew Point(DP20M_STD)
• Standard Deviation of 40m Calculated Vapor Pressure(VP40M_STD)
• 1 minute Average Visibility(AvgVis1mi)
• 2m Average Calculated Vapor Pressure(VP2M_AVG)
• Standard Deviation of 2m Calculated Dew Point(DP2M_STD)
• 10m Average QLI Reference Temperature(RefT10m_AVG)
• 2m Average Relative Humidity(RH2M_AVG)
• 2m Vector Averaged Wind Speed(WS2M_U_WVT)
• 10m Average Relative Humidity(RH10M_AVG)
• Standard Deviation of Sonic Vector Averaged Wind Direction(SonicWD_SDU_WVT)
• Standard Deviation of 2m Calculated Vapor Pressure(VP2M_STD)
• Standard Deviation of 2m Temperature(T2M_STD)
• Standard Deviation of 40m Calculated Dew Point(DP40M_STD)
• Standard Deviation of 20m Calculated Vapor Pressure(VP20M_STD)
• 10m Average Temperature(T10M_AVG)
• 1 hour Present Weather Code(PwCod1hr)
• 2m Arithmetic Mean Wind Speed(WS2M_S_WVT)
• 20m Vector Averaged Wind Direction(WD20M_DU_WVT)
• Cumulative Snow Sum(CumSnow)
• 40m Average Relative Humidity(RH40M_AVG)
• Average Y Component of Sonic Wind Speed(SonicY_AVG)
• 10m Arithmetic Mean Wind Speed(WS10M_S_WVT)
• Standard Deviation of 40m Relative Humidity(RH40M_STD)
• Standard Deviation of 10m Calculated Dew Point(DP10M_STD)
• Present Weather Sensor Alarm(PWSAlarm)
• 20m Average QLI Input Voltage(Volt20M_AVG)
• Standard Deviation of 2m Vector Averaged Wind Direction(WD2M_SDU_WVT)
• 40m Average QLI Reference Voltage(Volt40M_AVG)
• Instant Present Weather Code(InstPwCod)
• Standard Deviation of 20m Relative Humidity(RH20M_STD)
• Standard Deviation of 2m Relative Humidity(RH2M_STD)
• 2m Average QLI Input Voltage(Volt2M_AVG)
• 20m Average Calculated Dew Point(DP20M_AVG)
• 40m Arithmetic Mean Wind Speed(WS40M_S_WVT)
• 10m Vector Averaged Wind Speed(WS10M_U_WVT)
• 40m Average Temperature(T40M_AVG)
• Standard Deviation of 10m Vector Averaged Wind Direction(WD10M_SDU_WVT)
• Standard Deviation of 10m Relative Humidity(RH10M_STD)
• 40m Vector Averaged Wind Speed(WS40M_U_WVT)
• Precipitation Rate(PcpRate)
• Standard Deviation of 10m Temperature(T10M_STD)
• Average X Component of Sonic Wind Speed(SonicX_AVG)
• 10m Average Calculated Dew Point(DP10M_AVG)
• Standard Deviation of 10m Calculated Vapor Pressure(VP10M_STD)
• Standard Deviation of 40m Vector Averaged Wind Direction(WD40M_SDU_WVT)
• 2m Average QLI Reference Temperature(RefT2M_AVG)
• 20m Average QLI Reference Temperature(RefT20M_AVG)
• 10m Average QLI Input Voltage(Volt10M_AVG)
• 20m Vector Averaged Wind Speed(WS20M_U_WVT)
• 20m Arithmetic Mean Wind Speed(WS20M_S_WVT)
• 2m Vector Averaged Wind Direction(WD2M_DU_WVT)
• Standard Deviation of 20m Vector Averaged Wind Direction(WD20M_SDU_WVT)
• 10 minute Average Visibility(AvgVis10m)
• 40m Average Calculated Dew Point(DP40M_AVG)
• 40m Average Calculated Vapor Pressure(VP40M_AVG)
• Sonic Vector Averaged Wind Speed(SonicWS_U_WVT)
• 10m Vector Averaged Wind Direction(WD10M_DU_WVT)

NSA/METTWR/C1 - CMH and PWS data missing

The CMH and PWS data are missing and unrecoverable.  A GFCI was tripped causing a loss of 
power to these sensors.   The CMH came back online at 1916 GMT and the PWS came back 
online at 1918 GMT.

• 15 minute Present Weather Code(PwCod15mi)
• 1 minute Average Visibility(AvgVis1mi)
• Chilled Mirror Dew Point(CMHDP)
• Instant Present Weather Code(InstPwCod)
• Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)
• Chilled Mirror Calculated Relative Humidity(CMHRH)
• Chilled Mirror Calculated Vapor Pressure(VPCMH)
• 1 hour Present Weather Code(PwCod1hr)
• Cumulative Snow Sum(CumSnow)
• 10 minute Average Visibility(AvgVis10m)
• Chilled Mirror Temperature(CMHTemp)
• Precipitation Rate(PcpRate)
• Cumulative Water Sum(CumH2O)
• Present Weather Sensor Alarm(PWSAlarm)

NSA/METTWR/C1 - CMH Data Missing

Data from CMH was missing due to a corroded RS-232 9-Pin connector.

• Chilled Mirror Calculated Vapor Pressure(VPCMH)
• Chilled Mirror Calculated Relative Humidity(CMHRH)
• Chilled Mirror Dew Point(CMHDP)
• Chilled Mirror Temperature(CMHTemp)
• Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)

NSA/METTWR/C1 - 2m wind Direction Sensor Failed

The 2m cup wind direction flat lined at 236 degrees.  Sensor failed.

• Standard Deviation of 2m Vector Averaged Wind Direction(WD2M_SDU_WVT)
• 2m Vector Averaged Wind Speed(WS2M_U_WVT)
• 2m Vector Averaged Wind Direction(WD2M_DU_WVT)
• 2m Arithmetic Mean Wind Speed(WS2M_S_WVT)

NSA/METTWR/C1 - Data 1-minute behind

Data from the Barometer, Chilled Mirror Hygrometer and the Present Weather Sensor were 
one-minute behind due to timing problems collecting data from the Serial Data Multiplexer 
that handled these sensors.

• 15 minute Present Weather Code(PwCod15mi)
• 1 minute Average Visibility(AvgVis1mi)
• Chilled Mirror Dew Point(CMHDP)
• Instant Present Weather Code(InstPwCod)
• Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)
• Chilled Mirror Calculated Relative Humidity(CMHRH)
• Chilled Mirror Calculated Vapor Pressure(VPCMH)
• 1 hour Present Weather Code(PwCod1hr)
• Cumulative Snow Sum(CumSnow)
• 10 minute Average Visibility(AvgVis10m)
• Chilled Mirror Temperature(CMHTemp)
• Precipitation Rate(PcpRate)
• Cumulative Water Sum(CumH2O)
• Present Weather Sensor Alarm(PWSAlarm)
• Atmospheric Pressure(AtmPress)

NSA/METTWR/C1 - Reprocess: Wind direction data incorrect

Wind direction data is off by 30 degrees for all wind sensors.  The 40-m tower was 
misaligned to true north.

• 40m Vector Averaged Wind Direction(WD40M_DU_WVT)
• 2m Vector Averaged Wind Direction(WD2M_DU_WVT)
• 20m Vector Averaged Wind Direction(WD20M_DU_WVT)
• Sonic Vector Averaged Wind Direction(SonicWD_DU_WVT)
• 10m Vector Averaged Wind Direction(WD10M_DU_WVT)

NSA/METTWR/C1 - CMH Data Not Representative

The intake of the CMH was blocked with hoar frost.  The temperatures measured by the 
chilled mirror and the temperature probe were not representative of the ambient conditions as 
a result.  The RH data calculated from these values is incorrect also.

• Chilled Mirror Calculated Vapor Pressure(VPCMH)
• Chilled Mirror Calculated Relative Humidity(CMHRH)
• Chilled Mirror Dew Point(CMHDP)
• Chilled Mirror Temperature(CMHTemp)
• Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)

NSA/METTWR/C1 - CMH Data missing

CMH dew point and temp data was missing. Since Dew Point and Temp data missing RH% value = 
100% during outage.  Corrosion on power plug was athe problem.

• Chilled Mirror Calculated Vapor Pressure(VPCMH)
• Chilled Mirror Calculated Relative Humidity(CMHRH)
• Chilled Mirror Dew Point(CMHDP)
• Chilled Mirror Temperature(CMHTemp)
• Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)

NSA/METTWR/C1 - Ultrasonic Wind Sensor Values Incorrect

The values collected from the ultrasonic wind sensor were intermittently incorrect.  Heavy 
wet snow during blizzard condition was interfering with the ultrasonic readings.

• Sonic Arithmetic Mean Wind Speed(SonicWS_S_WVT)
• Sonic Vector Averaged Wind Direction(SonicWD_DU_WVT)
• Average Y Component of Sonic Wind Speed(SonicY_AVG)
• Standard Deviation of Sonic Vector Averaged Wind Direction(SonicWD_SDU_WVT)
• Average Sonic Static Speed of Sound(SonicS_AVG)
• Sonic Vector Averaged Wind Speed(SonicWS_U_WVT)
• Average X Component of Sonic Wind Speed(SonicX_AVG)

NSA/METTWR/C1 - PWS data missing due to blizzard

PWS was offline and data was missing.  A blizzard consisting of heavy wet snow and strong 
winds caused snow impaction in the optics.  The PWS reported missing data as it was 
unable to measure anything meaningful.

• 15 minute Present Weather Code(PwCod15mi)
• 1 minute Average Visibility(AvgVis1mi)
• Instant Present Weather Code(InstPwCod)
• 1 hour Present Weather Code(PwCod1hr)
• Cumulative Snow Sum(CumSnow)
• 10 minute Average Visibility(AvgVis10m)
• Precipitation Rate(PcpRate)
• Present Weather Sensor Alarm(PWSAlarm)

NSA/METTWR/C1 - 2m Wind Speed Artificially Low

The 2m wind speed values were artificially low due to snow impaction during a heavy 
blizzard.  The cup anemometer heaters could not keep up with the rapid deposition of snow.

• 2m Vector Averaged Wind Speed(WS2M_U_WVT)
• 2m Arithmetic Mean Wind Speed(WS2M_S_WVT)

NSA/METTWR/C1 - CMH temp inaccurate

The CMH Temperature was consistently 4-7 degrees warmer than the 2M, 40M, 20M, and 10M 
temp. Intake fan failure; fan was replaced.

• Chilled Mirror Calculated Vapor Pressure(VPCMH)
• Chilled Mirror Calculated Relative Humidity(CMHRH)
• Chilled Mirror Dew Point(CMHDP)
• Chilled Mirror Temperature(CMHTemp)
• Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)

NSA/METTWR/C1 - 10m Wind Speed Low

The 10m wind speed values are too low due to ice accumulation on the cup anemometer.

• 10m Arithmetic Mean Wind Speed(WS10M_S_WVT)
• 10m Vector Averaged Wind Speed(WS10M_U_WVT)

NSA/METTWR/C1 - 10m Wind Speed Intermittently Low

The 10m wind speeds are intermittently too low due to ice accumulation on the cup 
anemometer.

• 10m Arithmetic Mean Wind Speed(WS10M_S_WVT)
• 10m Vector Averaged Wind Speed(WS10M_U_WVT)

NSA/METTWR/C1 - 40m Wind Speeds Intermittently Low

The 40m wind speed values were too low due to ice accumulation on the cup anemometer.

• 40m Vector Averaged Wind Speed(WS40M_U_WVT)
• 40m Arithmetic Mean Wind Speed(WS40M_S_WVT)

NSA/METTWR/C1 - 20m Wind Speeds Intermittently Low

The 20m wind speeds were artificially low due to ice accumulation on the cup anemometer.

• 20m Vector Averaged Wind Speed(WS20M_U_WVT)
• 20m Arithmetic Mean Wind Speed(WS20M_S_WVT)

NSA/METTWR/C1 - CMH Data Missing

CMH data was missing due to it being removed for maintenance.

• Chilled Mirror Calculated Vapor Pressure(VPCMH)
• Chilled Mirror Calculated Relative Humidity(CMHRH)
• Chilled Mirror Dew Point(CMHDP)
• Chilled Mirror Temperature(CMHTemp)
• Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)

NSA/METTWR/C1 - CMH Data Suspect

CMH data was suspect due to incorrect calibration caused by procedural errors.  The 
procedures were corrected and a new calibration completed.

• Chilled Mirror Calculated Vapor Pressure(VPCMH)
• Chilled Mirror Calculated Relative Humidity(CMHRH)
• Chilled Mirror Dew Point(CMHDP)
• Chilled Mirror Temperature(CMHTemp)
• Chilled Mirror Calculated Saturation Vapor Pressure(SatVPCMH)

NSA/METTWR/C1 - Wind direction measurements suspect

20m wind direction standard deviation was 0 degrees for extended periods of time.  This 
suggests the wind vane was icing up.

• 20m Vector Averaged Wind Direction(WD20M_DU_WVT)
• Standard Deviation of 20m Vector Averaged Wind Direction(WD20M_SDU_WVT)

NSA/METTWR/C1 - Reprocess: Barometric Data Changed from hPa to kPa

Barometric pressure data was converted from hPa to kPa in order to standardize the 
measurement units among ARM sites and to conform to accepted standard units determined by the 
scientific community.

• Atmospheric Pressure(AtmPress)

NSA/METTWR/C1 - Present Weather Sensor data missing or incorrect due to calibration.

The Present Weather Sensor data was missing or incorrect due to calibration checks.

• 15 minute Present Weather Code(PwCod15mi)
• 1 minute Average Visibility(AvgVis1mi)
• Instant Present Weather Code(InstPwCod)
• 1 hour Present Weather Code(PwCod1hr)
• Cumulative Snow Sum(CumSnow)
• 10 minute Average Visibility(AvgVis10m)
• Precipitation Rate(PcpRate)
• Cumulative Water Sum(CumH2O)
• Present Weather Sensor Alarm(PWSAlarm)