TWP/SMET/C3 - ORG data noisy due to degraded ground

SMET Rain Data began to be noisy during December 2005 and the problem slowly became worse 
over time so that in February 2006 the ORG was reporting with a constant background value 
of around 0.10 mm/hr rain rate.  ORG voltage showed a near constant value above the 85mV 
threshold.  The ground for the ORG had become degraded and was lost due to corrosion.

• Precipitation mean(precip_mean)
• Precipitation maximum(precip_max)
• Precipitation standard deviation(precip_sd)
• precipitation minimum(precip_min)

TWP/SMET/C1 - Upper wind speed sensor failure

The upper wind speed sensor was binding at low wind speeds.  Comparison to the lower wind 
sensor showed that the upper sensor flat-lines for long periods of time.  The upper 
anemometer was replaced.

• Wind #1 speed standard deviation(wind1_spd_sd)
• Wind #1 speed maximum gust(wind1_spd_max_gust)
• Wind #1 direction standard deviation(wind1_dir_sd)
• Wind #1 speed arithmetic average(wind1_spd_arith_avg)
• Wind #1 speed maximum(wind1_spd_max)
• Wind #1 direction vector average(wind1_dir_vec_avg)
• Wind #1 speed vector average(wind1_spd_vec_avg)
• Wind #1 speed minimum(wind1_spd_min)

TWP/MFRSR/C1 - Missing data

The data logger failed resulting in missing data until a replacement was installed on 
9/13/2006.

• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter5(barnard_good_fraction_filter5)
• solar constant corrected for solar distance for the Direct Narrowband Filter5(barnard_solar_constant_sdist_filter5)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter1(michalsky_good_fraction_filter1)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter4(barnard_good_fraction_filter4)
• solar constant corrected for solar distance for the Direct Narrowband Filter4(barnard_solar_constant_sdist_filter4)
• rejection flag for Direct Narrowband Filter2(michalsky_badflag_filter2)
• Angstrom exponent(barnard_angstrom_exponent)
• error in optical depth (slope) of final linear fit for the Direct Narrowband
  Filter2(barnard_error_slope_filter2)
• standard deviation around regression line for the Direct Narrowband Filter3(michalsky_standard_deviation_filter3)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter2(michalsky_good_fraction_filter2)
• error in optical depth (slope) of final linear fit for the Direct Narrowband
  Filter1(barnard_error_slope_filter1)
• standard deviation around regression line for the Direct Narrowband Filter2(michalsky_standard_deviation_filter2)
• solar constant corrected for solar distance for the Direct Narrowband Filter6(barnard_solar_constant_sdist_filter6)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter2(barnard_good_fraction_filter2)
• optical depth for the Direct Narrowband Filter6(michalsky_optical_depth_filter6)
• solar constant corrected for solar distance for the Direct Narrowband Filter2(michalsky_solar_constant_sdist_filter2)
• altitude above sea levelaltunits(alt)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter6(barnard_good_fraction_filter6)
• optical depth for the Direct Narrowband Filter5(michalsky_optical_depth_filter5)
• number of points used in final linear fit for the Direct Narrowband Filter1(michalsky_number_points_filter1)
• percentage of initial points used in final linear fit for the Direct Broadband(barnard_good_fraction_broadband)
• solar constant corrected for solar distance for the Direct Narrowband Filter1(barnard_solar_constant_sdist_filter1)
• rejection flag for Direct Narrowband Filter2(barnard_badflag_filter2)
• rejection flag for Direct Narrowband Filter1(barnard_badflag_filter1)
• rejection flag for Direct Narrowband Filter3(michalsky_badflag_filter3)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter1(barnard_good_fraction_filter1)
• solar constant corrected for solar distance for the Direct Narrowband Filter5(michalsky_solar_constant_sdist_filter5)
• error in optical depth (slope) of final linear fit for the Direct Narrowband
  Filter3(barnard_error_slope_filter3)
• solar constant corrected for solar distance for the Direct Narrowband Filter6(michalsky_solar_constant_sdist_filter6)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter3(barnard_good_fraction_filter3)
• error in final linear fit for the Direct Narrowband Filter5(barnard_error_fit_filter5)
• error in optical depth (slope) of final linear fit for the Direct Narrowband
  Filter5(barnard_error_slope_filter5)
• error in optical depth (slope) of final linear fit for the Direct Narrowband
  Filter4(barnard_error_slope_filter4)
• number of points used in final linear fit for the Direct Broadband(barnard_number_points_broadband)
• rejection flag for Direct Broadband(michalsky_badflag_broadband)
• rejection flag for Direct Narrowband Filter3(barnard_badflag_filter3)
• rejection flag for Direct Narrowband Filter5(michalsky_badflag_filter5)
• solar constant corrected for solar distance for the Direct BroadBand(barnard_solar_constant_sdist_broadband)
• number of points used in final linear fit for the Direct Broadband(michalsky_number_points_broadband)
• number of points used in final linear fit for the Direct Narrowband Filter3(barnard_number_points_filter3)
• optical depth for the Direct BroadBand(barnard_optical_depth_broadband)
• rejection flag for Direct Narrowband Filter4(barnard_badflag_filter4)
• north latitude for all the input platforms.(lat)
• solar constant corrected for solar distance for the Direct Narrowband Filter1(michalsky_solar_constant_sdist_filter1)
• standard deviation around regression line for the Direct BroadBand(michalsky_standard_deviation_broadband)
• rejection flag for Direct Narrowband Filter4(michalsky_badflag_filter4)
• error in optical depth (slope) of final linear fit for the Direct Narrowband
  Filter6(barnard_error_slope_filter6)
• number of points used in final linear fit for the Direct Narrowband Filter3(michalsky_number_points_filter3)
• solar constant corrected for solar distance for the Direct Broadband(michalsky_solar_constant_sdist_broadband)
• number of points used in final linear fit for the Direct Narrowband Filter4(barnard_number_points_filter4)
• number of points used in final linear fit for the Direct Narrowband Filter2(michalsky_number_points_filter2)
• solar constant corrected for solar distance for the Direct Narrowband Filter3(barnard_solar_constant_sdist_filter3)
• error in final linear fit for the Direct Narrowband Filter2(barnard_error_fit_filter2)
• number of points used in final linear fit for the Direct Narrowband Filter5(barnard_number_points_filter5)
• standard deviation around regression line for the Direct Narrowband Filter6(michalsky_standard_deviation_filter6)
• number of points used in final linear fit for the Direct Narrowband Filter4(michalsky_number_points_filter4)
• rejection flag for Direct Narrowband Filter6(michalsky_badflag_filter6)
• solar constant corrected for solar distance for the Direct Narrowband Filter2(barnard_solar_constant_sdist_filter2)
• number of points used in final linear fit for the Direct Narrowband Filter5(michalsky_number_points_filter5)
• east longitude for all the input platforms.(lon)
• number of points used in final linear fit for the Direct Narrowband Filter1(barnard_number_points_filter1)
• optical depth for the Direct Narrowband Filter2(michalsky_optical_depth_filter2)
• error in final linear fit for the Direct Narrowband Filter4(barnard_error_fit_filter4)
• optical depth for the Direct BroadBand(michalsky_optical_depth_broadband)
• solar constant for the Direct Narrowband Filter4(michalsky_solar_constant_filter4)
• optical depth for the Direct Narrowband Filter6(barnard_optical_depth_filter6)
• solar constant for the Direct Narrowband Filter3(michalsky_solar_constant_filter3)
• optical depth for the Direct Narrowband Filter4(barnard_optical_depth_filter4)
• percentage of initial points used in final linear fit for the Direct Broadband(michalsky_good_fraction_broadband)
• error in optical depth (slope) of final linear fit for the Direct Broadband(barnard_error_slope_broadband)
• optical depth for the Direct Narrowband Filter2(barnard_optical_depth_filter2)
• error in final linear fit for the Direct Narrowband Filter3(barnard_error_fit_filter3)
• number of points used in final linear fit for the Direct Narrowband Filter2(barnard_number_points_filter2)
• solar constant for the Direct Narrowband Filter6(michalsky_solar_constant_filter6)
• optical depth for the Direct Narrowband Filter5(barnard_optical_depth_filter5)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter3(michalsky_good_fraction_filter3)
• solar constant for the Direct Narrowband Filter1(michalsky_solar_constant_filter1)
• rejection flag for Direct Narrowband Filter5(barnard_badflag_filter5)
• standard deviation around regression line for the Direct Narrowband Filter5(michalsky_standard_deviation_filter5)
• Angstrom exponent(michalsky_angstrom_exponent)
• rejection flag for Direct Broadband(barnard_badflag_broadband)
• standard deviation around regression line for the Direct Narrowband Filter4(michalsky_standard_deviation_filter4)
• optical depth for the Direct Narrowband Filter3(barnard_optical_depth_filter3)
• error in final linear fit for the Direct Narrowband Filter6(barnard_error_fit_filter6)
• rejection flag for Direct Narrowband Filter6(barnard_badflag_filter6)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter5(michalsky_good_fraction_filter5)
• standard deviation around regression line for the Direct Narrowband Filter1(michalsky_standard_deviation_filter1)
• optical depth for the Direct Narrowband Filter4(michalsky_optical_depth_filter4)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter6(michalsky_good_fraction_filter6)
• Time offset from base_time(base_time)
• number of points used in final linear fit for the Direct Narrowband Filter6(michalsky_number_points_filter6)
• rejection flag for Direct Narrowband Filter1(michalsky_badflag_filter1)
• Time offset of tweaks from base_time(time_offset)
• optical depth for the Direct Narrowband Filter3(michalsky_optical_depth_filter3)
• solar constant for the Direct Narrowband Filter2(michalsky_solar_constant_filter2)
• error in final linear fit for the Direct BroadBand(barnard_error_fit_broadband)
• number of points used in final linear fit for the Direct Narrowband Filter6(barnard_number_points_filter6)
• solar constant for the Direct BroadBand(michalsky_solar_constant_broadband)
• solar constant for the Direct Narrowband Filter5(michalsky_solar_constant_filter5)
• optical depth for the Direct Narrowband Filter1(barnard_optical_depth_filter1)
• optical depth for the Direct Narrowband Filter1(michalsky_optical_depth_filter1)
• solar constant corrected for solar distance for the Direct Narrowband Filter4(michalsky_solar_constant_sdist_filter4)
• error in final linear fit for the Direct Narrowband Filter1(barnard_error_fit_filter1)
• percentage of initial points used in final linear fit for the Direct Narrowband
  Filter4(michalsky_good_fraction_filter4)
• solar constant corrected for solar distance for the Direct Narrowband Filter3(michalsky_solar_constant_sdist_filter3)

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

• rejected points for the final fit for the Direct Narrowband Filter3(barnard_rejected_filter3)
• east longitude for all the input platforms.(lon)
• Time offset from base_time(base_time)
• rejected points for the final fit for the Direct Broadband(michalsky_rejected_broadband)
• Airmasses(barnard_airmass)
• log(irradiance) for the Direct Narrowband Filter6(barnard_lnI_filter6)
• log(irradiance) for the Direct Narrowband Filter5(michalsky_lnI_filter5)
• log(irradiance) for the Direct Broadband(michalsky_lnI_broadband)
• rejected points for the final fit for the Direct Narrowband Filter1(barnard_rejected_filter1)
• rejected points for the final fit for the Direct Narrowband Filter5(barnard_rejected_filter5)
• rejected points for the final fit for the Direct Narrowband Filter6(barnard_rejected_filter6)
• north latitude for all the input platforms.(lat)
• rejected points for the final fit for the Direct Broadband(barnard_rejected_broadband)
• rejected points for the final fit for the Direct Narrowband Filter1(michalsky_rejected_filter1)
• rejected points for the final fit for the Direct Narrowband Filter4(barnard_rejected_filter4)
• rejected points for the final fit for the Direct Narrowband Filter4(michalsky_rejected_filter4)
• rejected points for the final fit for the Direct Narrowband Filter5(michalsky_rejected_filter5)
• rejected points for the final fit for the Direct Narrowband Filter3(michalsky_rejected_filter3)
• log(irradiance) for the Direct Narrowband Filter2(michalsky_lnI_filter2)
• log(irradiance) for the Direct Narrowband Filter2(barnard_lnI_filter2)
• altitude above sea levelaltunits(alt)
• log(irradiance) for the Direct Narrowband Filter1(barnard_lnI_filter1)
• log(irradiance) for the Direct Narrowband Filter1(michalsky_lnI_filter1)
• rejected points for the final fit for the Direct Narrowband Filter2(michalsky_rejected_filter2)
• log(irradiance) for the Direct Narrowband Filter3(michalsky_lnI_filter3)
• log(irradiance) for the Direct Narrowband Filter4(michalsky_lnI_filter4)
• rejected points for the final fit for the Direct Narrowband Filter2(barnard_rejected_filter2)
• log(irradiance) for the Direct Narrowband Filter6(michalsky_lnI_filter6)
• Airmasses(michalsky_airmass)
• rejected points for the final fit for the Direct Narrowband Filter6(michalsky_rejected_filter6)
• log(irradiance) for the Direct Narrowband Filter4(barnard_lnI_filter4)
• Time offset of tweaks from base_time(time_offset)
• log(irradiance) for the Direct Narrowband Filter3(barnard_lnI_filter3)
• log(irradiance) for the Direct Narrowband Filter5(barnard_lnI_filter5)
• log(irradiance) for the Direct Broadband(barnard_lnI_broadband)

• Ozone absorption coefficient used for filter 3(Ozone_absorption_coefficient_filter3)
• Ozone absorption coefficient used for filter 1(Ozone_absorption_coefficient_filter1)
• Ozone absorption coefficient used for filter 2(Ozone_absorption_coefficient_filter2)
• Optical depth from TOMS satellite(TOMS_optical_depth)
• total optical depth direct narrowband filter 3(total_optical_depth_filter3)
• surface pressure(surface_pressure)
• total optical depth direct narrowband filter 4(total_optical_depth_filter4)
• angstrom exponent(angstrom_exponent)
• total optical depth direct narrowband filter 5(total_optical_depth_filter5)
• extraterrestrial spectral irradiance used for optical depth calculations,
  corrected for eccentricity of earth\'s orbit(io_filter2)
• Ozone absorption coefficient used for filter 4(Ozone_absorption_coefficient_filter4)
• extraterrestrial spectral irradiance used for optical depth calculations,
  corrected for eccentricity of earth\'s orbit(io_filter1)
• extraterrestrial spectral irradiance used for optical depth calculations,
  corrected for eccentricity of earth\'s orbit(io_filter3)
• north latitude for all the input platforms.(lat)
• altitude above sea levelaltunits(alt)
• Rayleigh optical thickness computed for filter 3(Rayleigh_optical_thickness_filter3)
• Rayleigh optical thickness computed for filter 2(Rayleigh_optical_thickness_filter2)
• aerosol optical depth filter 2(aerosol_optical_depth_filter2)
• Ozone absorption coefficient used for filter 5(Ozone_absorption_coefficient_filter5)
• Airmasses(airmass)
• Rayleigh optical thickness computed for filter 1(Rayleigh_optical_thickness_filter1)
• aerosol optical depth filter 1(aerosol_optical_depth_filter1)
• Time offset from base_time(base_time)
• extraterrestrial spectral irradiance used for optical depth calculations,
  corrected for eccentricity of earth\'s orbit(io_filter5)
• Indicator of optical depth stability(optical_depth_stability_flag)
• total optical depth direct narrowband filter 1(total_optical_depth_filter1)
• extraterrestrial spectral irradiance used for optical depth calculations,
  corrected for eccentricity of earth\'s orbit(io_filter4)
• east longitude for all the input platforms.(lon)
• Rayleigh optical thickness computed for filter 5(Rayleigh_optical_thickness_filter5)
• Time offset of tweaks from base_time(time_offset)
• aerosol optical depth filter 3(aerosol_optical_depth_filter3)
• Rayleigh optical thickness computed for filter 4(Rayleigh_optical_thickness_filter4)
• aerosol optical depth filter 4(aerosol_optical_depth_filter4)
• aerosol optical depth filter 5(aerosol_optical_depth_filter5)
• totaloptical depth direct narrowband filter 2(total_optical_depth_filter2)

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

TWP/SMET/C1 - Reprocess: Tipping bucket rain gauge added

A tipping bucket rain gauge was added to the TWP.C1 SMET suite of instruments on 20061017. 
 Effective 20060926, two new variables (count and rain amount) were added to the end of 
the twpsmet60sC1.b1 datastream.  Between 9/26 and 10/17, the data for these two variables 
are filled with zeros.  Users should not use the data during this period as the zeros 
are not representative of the rain fall at the site.  When reprocessing of this datastream 
occurs these variables will be added for the 19961009-20060926 and data from 
19961009-20061017 will be filled with -9999 (missing).

• Time offset from base_time(base_time)

TWP/SMET/C2 - Reprocess: Tipping bucket rain gauge added

A tipping bucket rain gauge was added to the TWP.C2 SMET suite of instruments on 20061129. 
Effective 20060926, two new variables (count and rain amount) were added to the end of 
the twpsmet60sC2.b1 datastream.  Between 9/26 and 11/29, the data for these two variables 
are filled with zeros.  Users should not use the data during this period as the zeros are 
not representative of the rain fall at the site.  When reprocessing of this datastream 
occurs these variables will be added for the 19981021-20060926 and data from 
19981021-20061129 will be filled with -9999 (missing).

• Time offset from base_time(base_time)

TWP/SMET/C3 - Reprocess: Tipping bucket rain gauge added

A tipping bucket rain gauge was added to the SMET suite of instruments effective 20060926. 
 Two new variables (count and rain amount) were added at the end of the twpsmet60sC1.b1 
datastream.  When reprocessing of this datastream occurs these variables will be added 
with -9999 (missing) as the value for dates prior to gauge installation.

• Time offset from base_time(base_time)

TWP/SKYRAD/C2 - IRT signal

The IRT exhibited a bias of the analog voltage output that caused problems with the 
signals from the other SKYRAD radiometers. The bias was due to corrosion between the power and 
signal connections in the IRT cable. The IRT was disconnected on 10/18/2006 at 01:20 and 
replaced on 11/6/2006 at 23:00 but it too appeared to have grounding problems due to 
internal corrosion and was disconnected on 11/11/2006 at 11:42 and then intermittently 
reconnected for testing. A second spare was installed on 12/4/2006 which did not cause problems 
with the signals from the other instruments.

• Sky/Cloud Infra-Red Temperature Minima(sky_ir_temp_min)
• Sky/Cloud Infra-Red Temperature Maxima(sky_ir_temp_max)
• Sky/Cloud Infra-Red Temperature(sky_ir_temp)
• Sky/Cloud Infra-Red Temperature Standard Deviation(sky_ir_temp_std)

TWP/SKYRAD/C3 - NIP Failure

Skyrad normal incident shortwave irradiance (NIP) started reporting impossible values for 
direct normal irradiance starting 16 November approx 2100GMT corresponding to a rain 
event at the same time.

The NIP was replaced fixing the problem.

Direct normal data are not recoverable.  However, the NIP data can be calculated from the 
global hemsipherical shortwave and global hemispherical diffuse datastreams by using the 
following relationship:
Global Horizontal = Direct Normal x cos(Z) + Diffuse Horizontal 
where Z is the zenith angle.

• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)

• Instantaneous Direct Normal Shortwave Irradiance, Pyrheliometer Thermopile
  Voltage(inst_direct_normal)

TWP/SKYRAD/C3 - NIP instrument failure

The NIP (Short Direct Normal) was replaced after it displayed symptoms of failure 
associated with either unknown precipitation related issues or a possible lightning strike.

NIP data are not recoverable.  Direct normal data can be reconstructed from global 
hemispheric and global diffuse data using the following relationship:
   global hemispheric = direct*cos(sza) + diffuse hemispheric

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

• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)

• Instantaneous Direct Normal Shortwave Irradiance, Pyrheliometer Thermopile
  Voltage(inst_direct_normal)

TWP/GNDRAD/C2 - IRT signal

When the other GNDRAD radiometers were replaced on 12/3/2006, the quality of the IRT 
signal began to degrade until 12/26 when it became unusable. The instrument was replaced on 
2/4/2007.

• Surface Infra-Red Temperature Minima(sfc_ir_temp_min)
• Surface Infra-Red Temperature, Standard Deviation(sfc_ir_temp_std)
• Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)
• Effective Surface (Skin) Temperature(sfc_ir_temp)

TWP/SKYRAD/C2 - Short direct normal

The short_direct_normal (NIP) data are missing or incorrect due to instrument cable 
failure.  The cable was replaced.

The short_direct_normal can be calculated using the following relationship for shortwave 
radiometers:
global hemispheric = diffuse hemispheric + direct normal *cos (zenith angle)

• Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
• Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
• Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)

• Instantaneous Direct Normal Shortwave Irradiance, Pyrheliometer Thermopile
  Voltage(inst_direct_normal)

TWP/SMET/C3 - Barometer Data Incorrect

The barometer data was incorrect or missing due to water intrusion.

• Atmospheric pressure(atmos_pressure)

TWP/SMET/C3 - Data Incorrect Due to Water Intrusion

Data became erratic and unreasonable after water intrusion into the enclosure.

• Vapor pressure standard deviation(vappress_sd)
• Precipitation maximum(precip_max)
• Relative humidity maximum(relh_max)
• Relative humidity mean(relh_mean)
• Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
• Relative humidity minimum(relh_min)
• precipitation minimum(precip_min)
• Precipitation mean(precip_mean)
• Min Temperature at lowest Model Level- 1 hr(temp_min)
• Mean Air Temperature or Hardware Error(temp_mean)
• Max Temperature at lowest Model Level- 1 hr(temp_max)
• Precipitation standard deviation(precip_sd)
• Vapor pressure mean(vappress_mean)
• Temperature standard deviation(temp_sd)

TWP/SKYRAD/C2 - IRT calibration

The IRT was not properly calibrated and was not able to measure sky temperatures below 
273.2 K. (This instrument was the same one damaged by lightning in November 2005 in Darwin. 
It was returned for repair and received a new lens but was calibrated only down to 0 deg 
C, so the problem was neither detected nor repaired.) The IRT was replaced on 2/22/2007.

• Sky/Cloud Infra-Red Temperature Minima(sky_ir_temp_min)
• Sky/Cloud Infra-Red Temperature Maxima(sky_ir_temp_max)
• Sky/Cloud Infra-Red Temperature(sky_ir_temp)
• Sky/Cloud Infra-Red Temperature Standard Deviation(sky_ir_temp_std)

TWP/GNDRAD/C2 - Reprocess: IRT calibration

The configuration of the IRT was set to that used at TWP/C3. This caused the calibration 
of the data to be wrong. It was corrected by reconfiguring the IRT to match the datalogger 
program.
   
These data can be reprocessed and corrected by adding 10K, i.e. sfc_ir_temp(new) = 
sfc_ir_temp(old) + 10K.

• Surface Infra-Red Temperature Minima(sfc_ir_temp_min)
• Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)
• Effective Surface (Skin) Temperature(sfc_ir_temp)