TWP - Switch to new Data Header Formats not timely

On April 1, 2001 at 00:00:00 new data header with consistent variable naming
conventions, etc were to be used for all sites, all data streams.  At the TWP
sites the time of the movement to the new convention did not occur precisely at 00:00:00.  
The following data files contain between 40 seconds and 20 minutes of data from 4/1/02 
in the old format.  The delayed format change did not affect data quality in any way.

twpgndrad60sC2.a1.20010401.000000.cdf
twpgndrad60sC2.b1.20010401.000000.cdf
twpmfrsrC2.a0.20010401.000000.cdf
twpmfrsrC2.b1.20010401.000000.cdf
twpmwrlosC2.a1.20010401.000008.cdf
twpmwrlosC2.b1.20010401.000008.cdf
twpskyrad20sC2.a1.20010401.000001.cdf
twpsmet60sC1.a1.20010401.000001.cdf
twpsmet60sC1.b1.20010401.000001.cdf
twpsmet60sC2.a1.20010401.000000.cdf
twpsmet60sC2.b1.20010401.000000.cdf

• Internal Logger Temperature(logger_temp)
• precipitation minimum(precip_min)
• GPS raw data filename(filename)
• Vapor pressure standard deviation(vappress_sd)
• Wind #1 speed minimum(wind1_spd_min)
• east longitude for all the input platforms.(lon)
• north latitude for all the input platforms.(lat)
• Time offset of tweaks from base_time(time_offset)
• Internal voltage(internal_voltage)
• Time offset from base_time(base_time)
• Wind #2 speed standard deviation(wind2_spd_sd)
• Relative humidity maximum(relh_max)
• Wind #2 speed maximum(wind2_spd_max)
• Wind #1 speed maximum(wind1_spd_max)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Min Temperature at lowest Model Level- 1 hr(temp_min)
• Temperature standard deviation(temp_sd)
• Vapor pressure mean(vappress_mean)
• Wind #2 speed minimum(wind2_spd_min)
• Atmospheric pressure(atmos_pressure)
• Wind #1 direction standard deviation(wind1_dir_sd)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• Precipitation maximum(precip_max)
• Bit data. See details.(bit_data)
• Wind #1 speed standard deviation(wind1_spd_sd)
• altitude above sea levelaltunits(alt)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Precipitation mean(precip_mean)
• Wind #2 direction standard deviation(wind2_dir_sd)
• Precipitation standard deviation(precip_sd)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• External voltage(external_voltage)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Relative humidity minimum(relh_min)
• Mean Air Temperature or Hardware Error(temp_mean)
• Relative humidity mean(relh_mean)
• Max Temperature at lowest Model Level- 1 hr(temp_max)
• Wind #2 direction vector average(wind2_dir_vec_avg)

• altitude above sea levelaltunits(alt)
• Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
  Maxima(up_long_hemisp_max)
• IRT1 standard deviation(irt1_sd)
• Bit data. See details.(bit_data)
• Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer(up_long_hemisp)
• Internal Logger Temperature(logger_temp)
• Net Radiation, Maxima(net_max)
• GPS raw data filename(filename)
• Effective Surface (Skin) Temperature(sfc_ir_temp)
• Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
  Minima(up_long_hemisp_min)
• Net Radiation, Minima(net_min)
• PSP1 unshaded mean(psp1_mean)
• east longitude for all the input platforms.(lon)
• Net Radiation(net)
• External voltage(external_voltage)
• PIR1 unshaded minimum(pir1_min)
• PSP1 unshaded minimum(psp1_min)
• Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)
• IRT1 maximum(irt1_max)
• IRT1 minimum(irt1_min)
• Surface Infra-Red Temperature, Standard Deviation(sfc_ir_temp_std)
• PIR1 unshaded mean(pir1_mean)
• Time offset of tweaks from base_time(time_offset)
• north latitude for all the input platforms.(lat)
• Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
  Maxima(up_short_hemisp_max)
• Net Radiation, Standard Deviation(net_std)
• Time offset from base_time(base_time)
• PIR1 unshaded maximum(pir1_max)
• PIR1 unshaded standard deviation(pir1_sd)
• Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
  Minima(up_short_hemisp_min)
• PSP1 unshaded standard deviation(psp1_sd)
• Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
  Standard Deviation(up_short_hemisp_std)
• Internal voltage(internal_voltage)
• PSP1 unshaded maximum(psp1_max)
• Surface Infra-Red Temperature Minima(sfc_ir_temp_min)
• Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer(up_short_hemisp)
• NET standard deviation(net_sd)
• IRT1 mean(irt1_mean)
• Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
  Standard Deviation(up_long_hemisp_std)
• NET mean(net_mean)

• Raw data stream - documentation not supported(Raw data stream - documentation not supported)

• Narrowband Direct Normal Irradiance, Filter 1, cosine corrected(direct_normal_narrowband_filter1)
• Narrowband Hemispheric Irradiance, Filter 6, offset and cosine corrected(hemisp_narrowband_filter6)
• Direct Normal Broadband Irradiance, cosine corrected, broadband scale applied(direct_normal_broadband)
• Narrowband Hemispheric Irradiance, Filter 3, offset and cosine corrected(hemisp_narrowband_filter3)
• Direct Normal Irradiance, NIMFR(direct_norm_narrowband)
• Narrowband Hemispheric Irradiance, Filter 1, offset and cosine corrected(hemisp_narrowband_filter1)
• MFRSR Detector Temperature(mfrsr_temp)
• Fields flagged by callang: 0 = no flag\n,(callang_flags)
• Narrowband Hemispheric Irradiance, Filter 5, offset and cosine corrected(hemisp_narrowband_filter5)
• Direct Normal Irradiance, Uncalibrated Silicon Detector, NIMFR(direct_norm_broadband)
• Hemispheric Broadband Irradiance (Approximate), MFRSR(total_hemisp_broadband)
• Narrowband Direct Normal Irradiance, Filter 6, cosine corrected(direct_normal_narrowband_filter6)
• Narrowband Diffuse Hemispheric Irradiance, Filter 2, offset and cosine corrected(diffuse_hemisp_narrowband_filter2)
• Narrowband Diffuse Hemispheric Irradiance, Filter 5, offset and cosine corrected(diffuse_hemisp_narrowband_filter5)
• Narrowband Direct Normal Irradiance, Filter 4, cosine corrected(direct_normal_narrowband_filter4)
• Narrowband Diffuse Hemispheric Irradiance, Filter 4, offset and cosine corrected(diffuse_hemisp_narrowband_filter4)
• Diffuse Hemispheric Broadband Irradiance, offset subtracted, cosine corrected,
  broadband scale applied(diffuse_hemisp_broadband)
• Narrowband Direct Normal Irradiance, Filter 2, cosine corrected(direct_normal_narrowband_filter2)
• altitude above sea levelaltunits(alt)
• Time offset from base_time(base_time)
• Hemispheric Irradiance, MFRSR(hemisp_narrowband)
• Narrowband Hemispheric Irradiance, Filter 2, offset and cosine corrected(hemisp_narrowband_filter2)
• Cosine of Apparent Solar Zenith Angle(cosine_solar_zenith_angle)
• east longitude for all the input platforms.(lon)
• Diffuse Hemispheric Irradiance, MFRSR(diffuse_hemisp_narrowband)
• Hemispheric Broadband Irradiance, offset and cosine corrected, broadband scale
  factor applied(hemisp_broadband)
• north latitude for all the input platforms.(lat)
• Narrowband Hemispheric Irradiance, Filter 4, offset and cosine corrected(hemisp_narrowband_filter4)
• Detector Temperature(head_temp)
• Narrowband Direct Normal Irradiance, Filter 5, cosine corrected(direct_normal_narrowband_filter5)
• Narrowband Diffuse Hemispheric Irradiance, Filter 1, offset and cosine corrected(diffuse_hemisp_narrowband_filter1)
• Time offset of tweaks from base_time(time_offset)
• Narrowband Direct Normal Irradiance, Filter 3, cosine corrected(direct_normal_narrowband_filter3)
• Narrowband Diffuse Hemispheric Irradiance, Filter 3, offset and cosine corrected(diffuse_hemisp_narrowband_filter3)
• Narrowband Diffuse Hemispheric Irradiance, Filter 6, offset and cosine corrected(diffuse_hemisp_narrowband_filter6)
• Data Logger Supply Voltage(logger_volt)

• Internal Logger Temperature(logger_temp)
• PIR1 unshaded minimum(pir1_min)
• east longitude for all the input platforms.(lon)
• Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
  Standard Deviation(up_long_hemisp_std)
• north latitude for all the input platforms.(lat)
• NET mean(net_mean)
• Net Radiation, Standard Deviation(net_std)
• IRT1 maximum(irt1_max)
• Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)
• PSP1 unshaded standard deviation(psp1_sd)
• PSP1 unshaded maximum(psp1_max)
• Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer(up_short_hemisp)
• IRT1 minimum(irt1_min)
• Time offset of tweaks from base_time(time_offset)
• Bit data. See details.(bit_data)
• Time offset from base_time(base_time)
• Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
  Maxima(up_short_hemisp_max)
• Internal voltage(internal_voltage)
• PSP1 unshaded minimum(psp1_min)
• altitude above sea levelaltunits(alt)
• Effective Surface (Skin) Temperature(sfc_ir_temp)
• Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer(up_long_hemisp)
• PIR1 unshaded maximum(pir1_max)
• PIR1 unshaded mean(pir1_mean)
• Net Radiation(net)
• IRT1 mean(irt1_mean)
• Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
  Standard Deviation(up_short_hemisp_std)
• NET standard deviation(net_sd)
• External voltage(external_voltage)
• Net Radiation, Minima(net_min)
• Net Radiation, Maxima(net_max)
• PIR1 unshaded standard deviation(pir1_sd)
• GPS raw data filename(filename)
• Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
  Minima(up_short_hemisp_min)
• Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
  Maxima(up_long_hemisp_max)
• Surface Infra-Red Temperature, Standard Deviation(sfc_ir_temp_std)
• Surface Infra-Red Temperature Minima(sfc_ir_temp_min)
• IRT1 standard deviation(irt1_sd)
• Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
  Minima(up_long_hemisp_min)
• PSP1 unshaded mean(psp1_mean)

• Total Horizontal Irradiance, 862 nm(tot6)
• Hemispheric Broadband Irradiance, offset and cosine corrected, broadband scale
  factor applied(hemisp_broadband)
• Diffuse Horizontal Irradiance, Broadband Solar(dif1)
• Data Logger Supply Voltage(logger_volt)
• Time offset of tweaks from base_time(time_offset)
• Diffuse Horizontal Irradiance, 500 nm(dif3)
• Detector Temperature(head_temp)
• Direct-normal Irradiance, 610 nm(dirn4)
• Direct-normal Irradiance, 862 nm(dirn6)
• Narrowband Direct Normal Irradiance, Filter 2, cosine corrected(direct_normal_narrowband_filter2)
• altitude above sea levelaltunits(alt)
• Diffuse Hemispheric Broadband Irradiance, offset subtracted, cosine corrected,
  broadband scale applied(diffuse_hemisp_broadband)
• Fields flagged by callang: 0 = no flag\n,(callang_flags)
• Narrowband Hemispheric Irradiance, Filter 4, offset and cosine corrected(hemisp_narrowband_filter4)
• Narrowband Diffuse Hemispheric Irradiance, Filter 3, offset and cosine corrected(diffuse_hemisp_narrowband_filter3)
• Narrowband Diffuse Hemispheric Irradiance, Filter 1, offset and cosine corrected(diffuse_hemisp_narrowband_filter1)
• Narrowband Direct Normal Irradiance, Filter 5, cosine corrected(direct_normal_narrowband_filter5)
• Narrowband Hemispheric Irradiance, Filter 2, offset and cosine corrected(hemisp_narrowband_filter2)
• Total Horizontal Irradiance, Broadband Solar(tot1)
• Diffuse Horizontal Irradiance, 415 nm(dif2)
• Narrowband Hemispheric Irradiance, Filter 6, offset and cosine corrected(hemisp_narrowband_filter6)
• Narrowband Diffuse Hemispheric Irradiance, Filter 6, offset and cosine corrected(diffuse_hemisp_narrowband_filter6)
• Diffuse Horizontal Irradiance, 862 nm(dif6)
• Total Horizontal Irradiance, 500 nm(tot3)
• Direct-normal Irradiance, 500 nm(dirn3)
• Total Horizontal Irradiance, 665 nm(tot5)
• Direct Normal Broadband Irradiance, cosine corrected, broadband scale applied(direct_normal_broadband)
• Narrowband Direct Normal Irradiance, Filter 1, cosine corrected(direct_normal_narrowband_filter1)
• Diffuse Horizontal Irradiance, 610 nm(dif4)
• Direct-normal Irradiance, 665 nm(dirn5)
• Datalogger supply voltage(supply_voltage)
• Narrowband Direct Normal Irradiance, Filter 3, cosine corrected(direct_normal_narrowband_filter3)
• Detector temperature(detector_temp)
• Time offset from base_time(base_time)
• Direct-normal Irradiance, 940 nm(dirn7)
• Total Horizontal Irradiance, 940 nm(tot7)
• Narrowband Diffuse Hemispheric Irradiance, Filter 2, offset and cosine corrected(diffuse_hemisp_narrowband_filter2)
• Narrowband Hemispheric Irradiance, Filter 5, offset and cosine corrected(hemisp_narrowband_filter5)
• Narrowband Diffuse Hemispheric Irradiance, Filter 4, offset and cosine corrected(diffuse_hemisp_narrowband_filter4)
• Narrowband Diffuse Hemispheric Irradiance, Filter 5, offset and cosine corrected(diffuse_hemisp_narrowband_filter5)
• Narrowband Hemispheric Irradiance, Filter 1, offset and cosine corrected(hemisp_narrowband_filter1)
• east longitude for all the input platforms.(lon)
• Diffuse Horizontal Irradiance, 665 nm(dif5)
• Narrowband Direct Normal Irradiance, Filter 4, cosine corrected(direct_normal_narrowband_filter4)
• Narrowband Direct Normal Irradiance, Filter 6, cosine corrected(direct_normal_narrowband_filter6)
• Narrowband Hemispheric Irradiance, Filter 3, offset and cosine corrected(hemisp_narrowband_filter3)
• Direct-normal Irradiance, 415 nm(dirn2)
• north latitude for all the input platforms.(lat)
• Diffuse Horizontal Irradiance, 940 nm(dif7)
• Total Horizontal Irradiance, 610 nm(tot4)
• Direct-normal Irradiance, Broadband Solar(dirn1)
• Total Horizontal Irradiance, 415 nm(tot2)

• GPS raw data filename(filename)
• Wind #2 speed maximum(wind2_spd_max)
• Time offset of tweaks from base_time(time_offset)
• External voltage(external_voltage)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Relative humidity maximum(relh_max)
• Relative humidity mean(relh_mean)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Wind #1 speed maximum(wind1_spd_max)
• Wind #1 speed standard deviation(wind1_spd_sd)
• Vapor pressure standard deviation(vappress_sd)
• east longitude for all the input platforms.(lon)
• Internal voltage(internal_voltage)
• Wind #2 speed standard deviation(wind2_spd_sd)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• Precipitation maximum(precip_max)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Relative humidity minimum(relh_min)
• Wind #1 speed minimum(wind1_spd_min)
• Atmospheric pressure(atmos_pressure)
• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• north latitude for all the input platforms.(lat)
• Precipitation mean(precip_mean)
• Mean Air Temperature or Hardware Error(temp_mean)
• altitude above sea levelaltunits(alt)
• Wind #2 direction standard deviation(wind2_dir_sd)
• Min Temperature at lowest Model Level- 1 hr(temp_min)
• Wind #2 speed minimum(wind2_spd_min)
• Vapor pressure mean(vappress_mean)
• Temperature standard deviation(temp_sd)
• Wind #1 direction standard deviation(wind1_dir_sd)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Time offset from base_time(base_time)
• precipitation minimum(precip_min)
• Wind #2 direction vector average(wind2_dir_vec_avg)
• Max Temperature at lowest Model Level- 1 hr(temp_max)
• Internal Logger Temperature(logger_temp)
• Bit data. See details.(bit_data)
• Precipitation standard deviation(precip_sd)

• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• Mean 23.8 GHz sky brightness temperature(tbsky23)
• Mean IR brightness temperature(ir_temp)
• Time offset from base_time(base_time)
• Mean total liquid water amount along LOS path(liq)
• east longitude for all the input platforms.(lon)
• Mean 31.4 GHz sky brightness temperature(tbsky31)
• altitude above sea levelaltunits(alt)
• north latitude for all the input platforms.(lat)
• Mean total water vapor amount along LOS path(vap)
• Actual Azimuth(actaz)
• Time offset of tweaks from base_time(time_offset)
• Actual elevation angle(actel)

• north latitude for all the input platforms.(lat)
• Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
  Pyrgeometer(inst_down_long_shaded_dome_resist)
• Instantaneous Downwelling Pyrgeometer Thermopile Voltage, Shaded Pyrgeometer(inst_down_long_hemisp_shaded_tp)
• altitude above sea levelaltunits(alt)
• Instantaneous PIR1 dome thermistor(pir1_dome_therm)
• Instantaneous PIR2 case thermistor(pir2_case_therm)
• Instantaneous Downwelling Ultraviolet Biometer Temperature(inst_down_uvb_temp)
• Instantaneous UVB temperature(uvb_temp)
• Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
  Pyrgeometer(inst_down_long_shaded_case_resist)
• Instantaneous PIR1 uncorrected irradiance(pir1_uncorr_irradiance)
• Instantaneous PIR1 case thermistor(pir1_case_therm)
• Instantaneous PIR2 dome thermistor(pir2_dome_therm)
• Instantaneous UVB uncorrected irradiance(uvb_uncorr_irradiance)
• Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Unshaded
  Pyrgeometer(inst_down_long_unshaded_dome_resist)
• Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Unshaded
  Pyrgeometer(inst_down_long_unshaded_case_resist)
• Time offset from base_time(base_time)
• east longitude for all the input platforms.(lon)
• Time offset of tweaks from base_time(time_offset)
• Instantaneous PIR2 uncorrected irradiance(pir2_uncorr_irradiance)
• GPS raw data filename(filename)
• Instantaneous Uncorrected Downwelling Ultraviolet Irradiance, UV Biometer(inst_down_uvb_irradiance)
• Instantaneous Downwelling Pyrgeometer Thermopile, Unshaded Pyrgeometer(inst_down_long_hemisp_unshaded_tp)

• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• altitude above sea levelaltunits(alt)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Mixer kinetic (physical) temperature(tkxc)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• 23.8 GHz Blackbody signal(bb23)
• 23.8 GHz sky signal(sky23)
• 23.8 GHz noise injection brightness temperature(unoise23)
• Actual elevation angle(actel)
• Noise diode mount temperature(tknd)
• 31.4 GHz sky+noise injection signal(skyn31)
• 31.4 GHz sky signal(sky31)
• north latitude for all the input platforms.(lat)
• Mean 23.8 GHz sky brightness temperature(tbsky23)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Temperature correction coefficient at 31.4 GHz(tc31)
• east longitude for all the input platforms.(lon)
• 23.8 GHz sky plus noise injection signal(skyn23)
• Actual Azimuth(actaz)
• 31.4 GHz Blackbody signal(bb31)
• Blackbody kinetic temperature(tkbb)
• Time offset of tweaks from base_time(time_offset)
• Mean 31.4 GHz sky brightness temperature(tbsky31)
• Ambient temperature(tkair)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Mean total liquid water amount along LOS path(liq)
• 31.4 GHz blackbody+noise injection signal(bbn31)
• Mean IR brightness temperature(ir_temp)
• Mean total water vapor amount along LOS path(vap)
• 31.4 GHz noise injection brightness temperature(unoise31)
• Which LOS configuration(losn)
• Time offset from base_time(base_time)

• Narrowband Hemispheric Irradiance, Filter 1, offset and cosine corrected(hemisp_narrowband_filter1)
• Narrowband Diffuse Hemispheric Irradiance, Filter 6, offset and cosine corrected(diffuse_hemisp_narrowband_filter6)
• Narrowband Hemispheric Irradiance, Filter 3, offset and cosine corrected(hemisp_narrowband_filter3)
• Time offset from base_time(base_time)
• Direct Normal Broadband Irradiance, cosine corrected, broadband scale applied(direct_normal_broadband)
• Narrowband Diffuse Hemispheric Irradiance, Filter 4, offset and cosine corrected(diffuse_hemisp_narrowband_filter4)
• Narrowband Hemispheric Irradiance, Filter 5, offset and cosine corrected(hemisp_narrowband_filter5)
• Hemispheric Broadband Irradiance, offset and cosine corrected, broadband scale
  factor applied(hemisp_broadband)
• Narrowband Diffuse Hemispheric Irradiance, Filter 3, offset and cosine corrected(diffuse_hemisp_narrowband_filter3)
• Fields flagged by callang: 0 = no flag\n,(callang_flags)
• Narrowband Direct Normal Irradiance, Filter 6, cosine corrected(direct_normal_narrowband_filter6)
• Narrowband Direct Normal Irradiance, Filter 4, cosine corrected(direct_normal_narrowband_filter4)
• Narrowband Direct Normal Irradiance, Filter 2, cosine corrected(direct_normal_narrowband_filter2)
• Detector Temperature(head_temp)
• Data Logger Supply Voltage(logger_volt)
• MFRSR Detector Temperature(mfrsr_temp)
• Diffuse Hemispheric Irradiance, MFRSR(diffuse_hemisp_narrowband)
• Hemispheric Irradiance, MFRSR(hemisp_narrowband)
• east longitude for all the input platforms.(lon)
• Narrowband Direct Normal Irradiance, Filter 1, cosine corrected(direct_normal_narrowband_filter1)
• Narrowband Hemispheric Irradiance, Filter 2, offset and cosine corrected(hemisp_narrowband_filter2)
• north latitude for all the input platforms.(lat)
• Narrowband Direct Normal Irradiance, Filter 3, cosine corrected(direct_normal_narrowband_filter3)
• Time offset of tweaks from base_time(time_offset)
• Direct Normal Irradiance, Uncalibrated Silicon Detector, NIMFR(direct_norm_broadband)
• Narrowband Hemispheric Irradiance, Filter 4, offset and cosine corrected(hemisp_narrowband_filter4)
• Narrowband Hemispheric Irradiance, Filter 6, offset and cosine corrected(hemisp_narrowband_filter6)
• Narrowband Diffuse Hemispheric Irradiance, Filter 2, offset and cosine corrected(diffuse_hemisp_narrowband_filter2)
• Narrowband Diffuse Hemispheric Irradiance, Filter 5, offset and cosine corrected(diffuse_hemisp_narrowband_filter5)
• Narrowband Direct Normal Irradiance, Filter 5, cosine corrected(direct_normal_narrowband_filter5)
• Narrowband Diffuse Hemispheric Irradiance, Filter 1, offset and cosine corrected(diffuse_hemisp_narrowband_filter1)
• altitude above sea levelaltunits(alt)
• Cosine of Apparent Solar Zenith Angle(cosine_solar_zenith_angle)
• Direct Normal Irradiance, NIMFR(direct_norm_narrowband)
• Diffuse Hemispheric Broadband Irradiance, offset subtracted, cosine corrected,
  broadband scale applied(diffuse_hemisp_broadband)

• Wind #1 speed maximum(wind1_spd_max)
• Time offset from base_time(base_time)
• Wind #2 speed maximum(wind2_spd_max)
• Relative humidity maximum(relh_max)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #2 direction vector average(wind2_dir_vec_avg)
• Vapor pressure mean(vappress_mean)
• Precipitation maximum(precip_max)
• Precipitation mean(precip_mean)
• Wind #1 direction standard deviation(wind1_dir_sd)
• precipitation minimum(precip_min)
• Min Temperature at lowest Model Level- 1 hr(temp_min)
• External voltage(external_voltage)
• Time offset of tweaks from base_time(time_offset)
• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Relative humidity mean(relh_mean)
• Mean Air Temperature or Hardware Error(temp_mean)
• Max Temperature at lowest Model Level- 1 hr(temp_max)
• Internal voltage(internal_voltage)
• Wind #1 speed minimum(wind1_spd_min)
• Wind #2 speed standard deviation(wind2_spd_sd)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• altitude above sea levelaltunits(alt)
• Wind #1 speed standard deviation(wind1_spd_sd)
• Wind #2 speed minimum(wind2_spd_min)
• north latitude for all the input platforms.(lat)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Bit data. See details.(bit_data)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• Precipitation standard deviation(precip_sd)
• GPS raw data filename(filename)
• Internal Logger Temperature(logger_temp)
• Wind #2 direction standard deviation(wind2_dir_sd)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Atmospheric pressure(atmos_pressure)
• Vapor pressure standard deviation(vappress_sd)
• east longitude for all the input platforms.(lon)
• Temperature standard deviation(temp_sd)
• Relative humidity minimum(relh_min)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Wind #1 speed maximum gust(wind1_spd_max_gust)

• Raw data stream - documentation not supported(Raw data stream - documentation not supported)

• Mean Air Temperature or Hardware Error(temp_mean)
• Relative humidity mean(relh_mean)
• Vapor pressure standard deviation(vappress_sd)
• Wind #1 speed standard deviation(wind1_spd_sd)
• Vapor pressure mean(vappress_mean)
• Precipitation standard deviation(precip_sd)
• Wind #2 speed arithmetic average(wind2_spd_arith_avg)
• Wind #2 direction standard deviation(wind2_dir_sd)
• External voltage(external_voltage)
• Wind #2 speed minimum(wind2_spd_min)
• GPS raw data filename(filename)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #1 speed maximum(wind1_spd_max)
• Temperature standard deviation(temp_sd)
• Time offset from base_time(base_time)
• Wind #2 speed maximum(wind2_spd_max)
• Max Temperature at lowest Model Level- 1 hr(temp_max)
• Wind #2 direction vector average(wind2_dir_vec_avg)
• Wind #2 speed vector average(wind2_spd_vec_avg)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• Time offset of tweaks from base_time(time_offset)
• Min Temperature at lowest Model Level- 1 hr(temp_min)
• precipitation minimum(precip_min)
• Wind #2 speed maximum gust(wind2_spd_max_gust)
• Wind #1 speed minimum(wind1_spd_min)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Precipitation mean(precip_mean)
• Relative humidity maximum(relh_max)
• Internal voltage(internal_voltage)
• Atmospheric pressure(atmos_pressure)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• north latitude for all the input platforms.(lat)
• Wind #2 speed standard deviation(wind2_spd_sd)
• Relative humidity minimum(relh_min)
• east longitude for all the input platforms.(lon)
• altitude above sea levelaltunits(alt)
• Internal Logger Temperature(logger_temp)
• Bit data. See details.(bit_data)
• Precipitation maximum(precip_max)
• Wind #1 direction standard deviation(wind1_dir_sd)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)

TWP/MWR/C2 - Power outage in I-Van resulted in Missing Data

I forgot to put in the daily report that we took the I van down yesterday to replace the 
fans
in the Clary UPS. This was from 2300z on 24May03 to 0010z on 25May03. Instruments affected 
:

MPL
Ceilometer
MWR
WSI
TSI

Rex

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

• Raw data stream - documentation not supported(Raw data stream - documentation not supported)

• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• 23.8 GHz sky signal(sky23)
• 23.8 GHz noise injection brightness temperature(unoise23)
• Mean total liquid water amount along LOS path(liq)
• Actual elevation angle(actel)
• east longitude for all the input platforms.(lon)
• 23.8 GHz sky plus noise injection signal(skyn23)
• altitude above sea levelaltunits(alt)
• Noise diode mount temperature(tknd)
• Actual Azimuth(actaz)
• 31.4 GHz blackbody+noise injection signal(bbn31)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Mean IR brightness temperature(ir_temp)
• Mean total water vapor amount along LOS path(vap)
• 31.4 GHz Blackbody signal(bb31)
• Blackbody kinetic temperature(tkbb)
• 31.4 GHz sky+noise injection signal(skyn31)
• Sky/Cloud Infra-Red Temperature(sky_ir_temp)
• Time offset of tweaks from base_time(time_offset)
• 31.4 GHz noise injection brightness temperature(unoise31)
• Mean 31.4 GHz sky brightness temperature(tbsky31)
• Which LOS configuration(losn)
• 31.4 GHz sky signal(sky31)
• Mixer kinetic (physical) temperature(tkxc)
• Time offset from base_time(base_time)
• Ambient temperature(tkair)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• north latitude for all the input platforms.(lat)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Mean 23.8 GHz sky brightness temperature(tbsky23)
• 23.8 GHz Blackbody signal(bb23)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Temperature correction coefficient at 31.4 GHz(tc31)

• Standard deviation of ensemble average for MWR ir_temp(sdev_ir_temp_mwr)
• Serial number for the sonde used at this time.(sonde_serial_number)
• Ensemble average for MWR vapor in window centered about balloon release(mean_vap_mwr)
• MWR IPM output for 23.8 GHz sky brightness temperature using sonde T,P,RH(model_tbsky23)
• Status of the Instrument Performance Model results(model_status_flag)
• Time offset from base_time(base_time)
• Integrated vapor column from sonde using a direct calculation (external from the
  IPM)(integ_vap_sonde_direct)
• Number of cloudy observations in BLC cloud1 ensemble(num_cloud1_cloudy)
• Ensemble average of first cloud base height from Belfort ceilometer in 40 minute
  window centered upon balloon release (clear observations are excluded)(mean_cloud1)
• east longitude for all the input platforms.(lon)
• Number of clear observations in BLC cloud1 ensemble (not used in ensemble
  average)(num_cloud1_clear)
• Standard deviation of ensemble average of first cloud base height from the
  Belfort ceilometer(sdev_cloud1)
• Ensemble average for MWR IR Brightness Temperature in window centered about
  balloon release(mean_ir_temp_mwr)
• Size of MWR ensemble for mean_tbsky31_mwr field(num_tbsky31_mwr)
• MWR IPM output for atmospheric mean radiating temp using sonde T,P,RH(model_tmr31)
• Standard deviation of ensemble average for MWR vapor(sd_vap_mwr)
• Time offset of tweaks from base_time(time_offset)
• Size of MWR ensemble for mean_vap_mwr field(num_vap_mwr)
• Standard deviation for ensemble average for MWR 31.4 GHz sky brightness
  temperature(sd_tbsky31_mwr)
• Size of MWR ensemble for mean_liq_mwr field(num_liq_mwr)
• ensemble average for MWR 23.8 GHz sky brightness temperature in window centered
  about balloon release(mean_tbsky23_mwr)
• north latitude for all the input platforms.(lat)
• Ensemble average for MWR liquid in window centered about balloon release(mean_liq_mwr)
• (model_tbsky31 - mean_tbsky31)/sd_tbsky31_mwr(sdev_tbsky31_away)
• ensemble average for MWR 31.4 GHz sky brightness temperature in window centered
  about balloon release(mean_tbsky31_mwr)
• Size of MWR ensemble for mean_tbsky23_mwr field(num_tbsky23_mwr)
• Standard deviation for ensemble average for MWR liq(sd_liq_mwr)
• MWR IPM output for 31.4 GHz sky brightness temperature using sonde T,P,RH(model_tbsky31)
• (integ_vap_sonde - mean_vap_mwr) /sd_vap_mwr(sdev_vap_away)
• maximum height attained by the balloon in pressure units(max_height_sonde)
• altitude above sea levelaltunits(alt)
• Integrated vapor column from sonde using MWR Instrument Performance Model (IPM)(integ_vap_sonde)
• denotes whether mean_liq_mwr was above LIQ_WATER_THRESHOLD or whether MWR IPM
  used the cloud model(likely_clouds)
• Standard deviation for ensemble average for MWR 23.8 GHz sky brightness
  temperature(sd_tbsky23_mwr)
• Size of MWR ensemble for mean_ir_temp_mwr field(num_ir_temp_mwr)
• (model_tbsky23 - mean_tbsky23_mwr)/sd_tbsky23_mwr(sdev_tbsky23_away)
• MWR IPM output for atmospheric mean radiating temp using sonde T,P,RH(model_tmr23)

• Standard deviation about the mean for the total water vapor amount(vap_sdev)
• Fraction of data in averaging interval with water on the Teflon window(water_flag_fraction)
• altitude above sea levelaltunits(alt)
• Number of points included in the ir_temp ensemble(num_obs_irt)
• north latitude for all the input platforms.(lat)
• east longitude for all the input platforms.(lon)
• Mean total liquid water amount along LOS path(liq)
• Standard deviation about the mean for the 31.4 GHz sky brightness temperature(tbsky31_sdev)
• Mean IR brightness temperature(ir_temp)
• Time offset of tweaks from base_time(time_offset)
• Number of points included in the ensemble of all the fields except the ir_temp
  fields(num_obs)
• Standard deviation about the mean for the 23.8 GHz sky brightness temperature(tbsky23_sdev)
• Mean 31.4 GHz sky brightness temperature(tbsky31)
• Time offset from base_time(base_time)
• Standard deviation about the mean for the IR brightness temperature(ir_temp_sdev)
• Mean 23.8 GHz sky brightness temperature(tbsky23)
• Mean total water vapor amount along LOS path(vap)
• Standard deviation about the mean for the total liquid water amount(liq_sdev)

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

TWP/MWR/C2 - min/max/delta values incorrect

The values of valid_min, valid_max, and valid_delta for fields tkxc and tknd were 
incorrect. They should be 303, 333, and 0.5 K, respectively.

• Mixer kinetic (physical) temperature(tkxc)
• Noise diode mount temperature(tknd)

TWP/MWR/C2 - Data Loss due to power difficulties

The MWR heater was inadvertently connected to a UPS with the WSI air conditioner. The UPS 
apparently failed when attempting to provide power to both systems, probably when the MWR 
detected rain and turned on the heater. This caused the MWR to lose power and melted the 
power connector to the blower and burned the internal heater wiring. The blower/heater 
was replaced with a new, refurbished unit and a temporary power connection was made to a 
non-UPS source.

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

• Raw data stream - documentation not supported(Raw data stream - documentation not supported)

• Sky/Cloud Infra-Red Temperature(sky_ir_temp)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• 23.8 GHz sky signal(sky23)
• Time offset of tweaks from base_time(time_offset)
• 23.8 GHz noise injection brightness temperature(unoise23)
• Mean total liquid water amount along LOS path(liq)
• 31.4 GHz noise injection brightness temperature(unoise31)
• Actual elevation angle(actel)
• east longitude for all the input platforms.(lon)
• Mean 31.4 GHz sky brightness temperature(tbsky31)
• 23.8 GHz sky plus noise injection signal(skyn23)
• Which LOS configuration(losn)
• 31.4 GHz sky signal(sky31)
• altitude above sea levelaltunits(alt)
• Noise diode mount temperature(tknd)
• Time offset from base_time(base_time)
• Mixer kinetic (physical) temperature(tkxc)
• Actual Azimuth(actaz)
• 31.4 GHz blackbody+noise injection signal(bbn31)
• Ambient temperature(tkair)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• north latitude for all the input platforms.(lat)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Mean IR brightness temperature(ir_temp)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Mean 23.8 GHz sky brightness temperature(tbsky23)
• 31.4 GHz Blackbody signal(bb31)
• Mean total water vapor amount along LOS path(vap)
• 23.8 GHz Blackbody signal(bb23)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Blackbody kinetic temperature(tkbb)
• 31.4 GHz sky+noise injection signal(skyn31)
• Temperature correction coefficient at 31.4 GHz(tc31)

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

TWP/MWR/C2 - thermal instability

The MWR required an unusually long time to reach thermal stability after a 4-day outage 
due to a power failure that damaged the blower/heater assembly. Also during this period, 
the heater, which had been replaced, appears to have been on continously, causing the data 
to be inappropriately flagged.

• 31.4 GHz sky signal(sky31)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Mean 23.8 GHz sky brightness temperature(tbsky23)
• Mean total water vapor amount along LOS path(vap)
• 23.8 GHz sky signal(sky23)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Mean 31.4 GHz sky brightness temperature(tbsky31)
• Mean total liquid water amount along LOS path(liq)

• Raw data stream - documentation not supported(Raw data stream - documentation not supported)

• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• 23.8 GHz sky signal(sky23)
• Mean total liquid water amount along LOS path(liq)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Mean 23.8 GHz sky brightness temperature(tbsky23)
• Mean total water vapor amount along LOS path(vap)
• Mean 31.4 GHz sky brightness temperature(tbsky31)
• 31.4 GHz sky signal(sky31)
• Temperature correction coefficient at 31.4 GHz(tc31)

• 31.4 GHz sky signal(tipsky31)
• Water on Teflon window (1=WET, 0=DRY)(wet_window)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• 23.8 GHz sky signal(tipsky23)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• Temperature correction coefficient at 31.4 GHz(tc31)

TWP/MWR/C2 - Data collection problem

Large, frequent data gaps occurred due to a failing laptop computer. The problem was 
corrected when a new computer was installed.

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

• Raw data stream - documentation not supported(Raw data stream - documentation not supported)

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

TWP/MWR/C2 - Heater problem

When the wiring of the air temperature sensor was checked the heater apparently began 
activating too often.

• Water on Teflon window (1=WET, 0=DRY)(wet_window)

• Fraction of data in averaging interval with water on the Teflon window(water_flag_fraction)

• Water on Teflon window (1=WET, 0=DRY)(wet_window)

TWP/MWR/C2 - mixer temperature

When the wiring of the air temperature sensor was checked the mixer temperature 
unexpectedly decreased 4 degrees. It increased to its normal value when the dielectric window was 
replaced. The problem was probably caused by a loose and/or corroded connection.

• Mixer kinetic (physical) temperature(tkxc)

• Mixer kinetic (physical) temperature(tkxc)

TWP/MWR/C2 - Reprocess: Revised Retrieval Coefficients

IN THE BEGINNING (June 1992), the retrieval coefficients used to derive 
the precipitable water vapor (PWV) and liquid water path (LWP) from the 
MWR brightness temperatures were based on the Liebe and Layton (1987) 
water vapor and oxygen absorption model and the Grant (1957) liquid 
water absorption model.

Following the SHEBA experience, revised retrievals based on the more 
recent Rosenkranz (1998) water vapor and oxygen absorption models and 
the Liebe (1991) liquid waer absorption model were developed.  The 
Rosenkranz water vapor absorption model resulted a 2 percent increase 
in PWV relative to the earlier Liebe and Layton model.  The Liebe 
liquid water absorption model decreased the LWP by 10% relative to the 
Grant model.  However, the increased oxygen absorption caused a 
0.02-0.03 mm (20-30 g/m2) reduction in LWP, which was particularly 
significant for low LWP conditions (i.e. thin clouds encountered at 
SHEBA).

Recently, it has been shown (Liljegren, Boukabara, Cady-Pereira, and 
Clough, TGARS v. 43, pp 1102-1108, 2005) that the half-width of the 
22 GHz water vapor line from the HITRAN compilation, which is 5 percent 
smaller than the Liebe and Dillon (1969) half-width used in Rosenkranz 
(1998), provided a better fit to the microwave brightness temperature 
measurements at 5 frequencies in the range 22-30 GHz, and yielded more 
accurate retrievals. Accordingly, revised MWR retrieval coefficients 
have been developed using MONORTM, which utilizes the HITRAN compilation 
for its spectroscopic parameters.  These new retrievals provide 3 
percent less PWV and 2.6 percent greater LWP than the previous 
retrievals based on Rosenkranz (1998).

Although the MWR data will be reprocessed to apply the new monortm-based 
retrievals, for most purposes it will be sufficient to correct the data 
using the following factors:

PWV_MONORTM = 0.9695 * PWV_ROSENKRANZ
LWP_MONORTM = 1.026  * LWP_ROSENKRANZ

The Rosenkranz-based retrieval coefficients became active at TWP.C2 
20020427.0600.  The MONORTM-based retrieval coefficients became active 
at TWP.C2 20050630.2100.

Note: a reprocessing effort is already underway to apply the 
Rosenkranz-based retrieval coefficients to all MWR prior to April 
2002.  An additional reprocessing task will be undertaken to apply 
the MONORTM retrieval to all MWR data when the first is completed. 
Read reprocessing comments in the netcdf file header carefully to 
ensure you are aware which retrieval is in play.

• Mean total water vapor amount along LOS path(vap)
• Mean total liquid water amount along LOS path(liq)

• Mean total liquid water amount along LOS path(liq)
• Mean total water vapor amount along LOS path(vap)

• Ensemble average for MWR liquid in window centered about balloon release(mean_liq_mwr)
• Ensemble average for MWR vapor in window centered about balloon release(mean_vap_mwr)

• Mean total liquid water amount along LOS path(liq)
• Mean total water vapor amount along LOS path(vap)

TWP/MWR/C2 - New software version (4.15) installed

A problem began with the installation of MWR.EXE version 4.12 in November 2002. The 
software had been upgraded from a "DOS" to a "Windows"-compiled program to address an earlier 
problem.  The software upgrade corrected the earlier problem but introduced a new one that 
caused line-of-sight observing cycles to be skipped, a 15% reduction in the number of 
tip curves, and saturation of CPU usage.  Software versions 4.13 and 4.14 also produced 
these problems.

The new MWR software version (4.15) was installed on 9/15/2005. As a consequence of this 
upgrade, the tip curve frequency increased. The tip cycle time decreased from ~60s to ~50s.

• 31.4 GHz sky signal(sky31)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Mixer kinetic (physical) temperature(tkxc)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• Blackbody kinetic temperature(tkbb)
• 23.8 GHz Blackbody signal(bb23)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Mean 23.8 GHz sky brightness temperature(tbsky23)
• 31.4 GHz Blackbody signal(bb31)
• Mean total water vapor amount along LOS path(vap)
• 23.8 GHz sky signal(sky23)
• Noise diode mount temperature(tknd)
• Ambient temperature(tkair)
• Mean IR brightness temperature(ir_temp)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• 31.4 GHz blackbody+noise injection signal(bbn31)
• Sky/Cloud Infra-Red Temperature(sky_ir_temp)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Mean 31.4 GHz sky brightness temperature(tbsky31)
• Mean total liquid water amount along LOS path(liq)

• 31.4 GHz sky signal(tipsky31)
• Noise diode mount temperature(tknd)
• Blackbody kinetic temperature(tkbb)
• Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
• Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
• Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
• 31.4 GHz goodness-of-fit coefficient(r31)
• 23.8 GHz goodness-of-fit coefficient(r23)
• Temperature correction coefficient at 23.8 GHz(tc23)
• Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
• 23.8 GHz sky signal(tipsky23)
• 31.4 GHz blackbody+noise injection signal(bbn31)
• 31.4 GHz Blackbody signal(bb31)
• Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
• Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
• 23.8 GHz blackbody+noise injection signal(bbn23)
• Temperature correction coefficient at 31.4 GHz(tc31)
• Mixer kinetic (physical) temperature(tkxc)
• Ambient temperature(tkair)