Subject: | TWP/MPL/C2 - Sun-shade dropping during daytime |
DataStreams: | twpmplC2.00, twpmplC2.a1, twpmplcmask1clothC2.c1, twpmplsmask1clothC2.c1
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Description: | The MPL sunshade began to act erratically on 9/15/2003 dropping frequently throughout day
and night. To reduce data loss, the sunshade was restrained from blocking the MPL during
the night. Thus, cloud detection during the night is satisfactory, but daytime
measurements are frequently interspersed with episodes of beam-block. |
Measurements: | twpmplsmask1clothC2.c1: - Time offset of tweaks from base_time(time_offset)
- Time offset from base_time(base_time)
- MPL Cloth et al. Algorithm Significance Mask(SigniMaskMplCloth)
- Range Heights (center of radar sample volume)(Heights)
twpmplC2.00: - Raw data stream - documentation not supported(Raw data stream - documentation not supported)
twpmplC2.a1: - Time offset from midnight of date of file. For CO data, this is identical to
time_offset and is included for compatibility.(time) - Laser temperature(laser_temp)
- Repetition rate, or Trigger Frequency of the laser(trigger_freq)
- Maximum altitude retrieved from multichannel scalar card.(max_altitude)
- Sum of raw backscatter counts per bin prior to ANY corrections.(total_counts)
- Time in nanoseconds for each range bin of multichannel scalar card.(range_bin_time)
- Angle of inclination with respect to horizontal(transceiver_altitude_angle)
- Background signal(background_signal)
- Energy output per pulse of transmitted laser beam at 523 nm (Doubled Nd-YLF)(energy_monitor)
- Number of laser pulses summed during measurement interval(shots_summed)
- Angle of orientation with respect to true geographic north(transceiver_azimuth_angle)
- Voltage level which operates the A/D card and the detector(voltage_05)
- Amount of time laser pulse lags behind the scalar trigger(laser_scalar_sync_offset)
- Time offset of tweaks from base_time(time_offset)
- Voltage level which operates the thermistor(voltage_10)
- east longitude for all the input platforms.(lon)
- Time offset from base_time(base_time)
- north latitude for all the input platforms.(lat)
- Width of range-bins calculated from range_bin_time(range_bin_width)
- altitude above sea levelaltunits(alt)
- required to correct raw counts for detector deadtime prior to all other
corrections.(deadtime_correction) - Amount of time the scalar lags behind the sync trigger(scalar_sync_offset)
- Distance from leading edge of first range bin to the center of each bin.(range_bins)
- Aerosol volume backscattering coefficient at 355 nm(backscatter)
- Preliminary cloud base height above ground level(preliminary_cbh)
- Number of laser pulses summed during measurement interval(shots_sum)
- Height of bins above ground level for the temperature, retrieved water vapor,
and pressure profile(height) - Detector temperature(detector_temp)
- Instrument temperature(instrument_temp)
- distance to center of range bin after correcting for offset in sync(range)
- Repetition rate, or Trigger Frequency of the laser(pulse_rep)
- Voltage level which operates the energy monitor(voltage_15)
- Filter temperature(filter_temp)
- effective range offset due to poor sync between laser firing and A/D trigger.(range_offset)
- value represents date when configuration is first applicable as YYYYMMDD(property)
- Amount of time the actual laser pulse lags behind the sync trigger(laser_sync_offset)
twpmplcmask1clothC2.c1: - MPL Clothiaux et al. Algorithm Cloud Mask Occurrence(CloudMaskMplCloth)
- Range Heights (center of radar sample volume)(Heights)
- Time offset from base_time(base_time)
- Time offset of tweaks from base_time(time_offset)
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