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/MPL/C1 - Data dropouts

Data dropouts occurred during this period. Problem ended when MPL computer was rebooted.

• Background Signal(background_signal)
• Angle of orientation with respect to true geographic north(tranceiver_azimuth_angle)
• range(range)
• Array of heights for the range gates(height)
• Detector Temperature(detector_temp)
• Dummy altitude for Zeb(alt)
• required to correct raw counts for detector deadtime prior to all other
  corrections.(deadtime_correction)
• Amount of time the actual laser pulse lags behind the sync trigger(laser_sync_offset)
• GPS raw data filename(filename)
• lon(lon)
• Attenuated backscatter(detector_counts)
• Maximum altitude retrieved from multichannel scalar card.(max_altitude)
• Voltage level which operates the thermistor(voltage_10)
• Cloud base height(cbh)
• Repetition Rate, or Trigger Frequency of the laser(pulse_rep)
• Preliminary cloud base height(preliminary_cbh)
• Voltage level which operates the energy monitor(voltage_15)
• value represents date of last configuration change as yyyymmdd(property)
• lat(lat)
• Angle of inclination with respect to horizontal(tranceiver_altitude_angle)
• Number of laser pulses summed during measurement interval(shots_sum)
• Laser Temperature(laser_temp)
• Aerosol backscatter coefficient at 355 nm(backscatter)
• Filter Temperature(filter_temp)
• time(time)
• Sum of raw backscatter counts per bin prior to ANY corrections.(total_counts)
• Distance from leading edge of first range bin to the center of each bin .(range_bins)
• Repetition rate, or Trigger Frequency of the laser(trigger_freq)
• Time offset of tweaks from base_time(time_offset)
• Voltage level which operates the A_D card and the detector(voltage_5)
• Width of range-bins calculated from range_bin_time(range_bin_width)
• Assumed zero-range bin number\(assumed_zero_range_bin)
• Number of laser shots recorded(shots_summed)
• Instrument Temperature(instrument_temp)
• effective range offset due to poor sync between laser firing and A/D trigger.(range_offset)
• base time(base_time)
• Laser output energy per pulse(energy_monitor)
• Amount of time the scalar lags behind the sync trigger(scalar_sync_offset)
• Amount of time laser pulse lags behind the scalar trigger(laser_scalar_sync_offset)
• Voltage level which operates the A/D card and the detector(voltage_05)
• Time in nanoseconds for each range bin of multichannel scalar card.(range_bin_time)

• Time offset of tweaks from base_time(time_offset)
• Height of Center of Each Range Bin(Heights)
• MPL Cloth et al. Algorithm Significance Mask(SigniMaskMplCloth)
• base time(base_time)

• base time(base_time)
• Time offset of tweaks from base_time(time_offset)
• Height of Center of Each Range Bin(Heights)
• MPL Cloth et al. Algorithm Cloud Mask(CloudMaskMplCloth)

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).

• base time(base_time)

TWP/MMCR/C1 - Reprocess: Height Error

A timing error was found in the PIRAQ MMCR's.  It resulted in recorded heights being too 
high for each radar mode by the following amounts: 
Mode 1: 24.8756 m too high
Mode 2: 25.6249 m too high
Mode 3: 33.1176 m too high
Mode 4: 33.1176 m too high
Range gate spacing was not affected.

• Array of heights for each power(heights)

• Height of Center of Each Range Bin(Heights)

• Raw data stream - documentation not supported(raw)

TWP/MMCR/C1 - Error in recorded heights

An error in MMCR configuration resulted in a timing error.  This caused erroneous height 
values (too large) to be recorded in the data files.

• Array of heights for each power(heights)

• Height of Center of Each Range Bin(Heights)

• Raw data stream - documentation not supported(raw)