TWP/MPL/C1 - Missing data

Data are missing and unrecoverable.

• Voltage level which operates the A_D card and the detector(voltage_5)
• Laser Temperature(laser_temp)
• Voltage level which operates the thermistor(voltage_10)
• Preliminary cloud base height above ground level(cbh)
• Aerosol backscatter coefficient at 355 nm(backscatter)
• Number of laser shots recorded(shots_summed)
• Background Signal(background_signal)
• Instrument Temperature(instrument_temp)
• Filter Temperature(filter_temp)
• Repetition Rate, or Trigger Frequency of the laser(pulse_rep)
• Detector Temperature(detector_temp)
• base time(base_time)
• Laser output energy per pulse(energy_monitor)
• Dummy altitude for Zeb(alt)
• Voltage level which operates the energy monitor(voltage_15)
• GPS raw data filename(filename)
• lon(lon)
• lat(lat)
• Time offset of tweaks from base_time(time_offset)

TWP/C1 - Incorrect elevation reported in Manus Data

Bill Clements reports we have been using 6m MSL as the station elevation of Momote 
(Manus).  This was based on information posted near the station barometer in the Momote Weather 
Service Office.  It turns out that the official WMO station elevation for Momote is 4m 
MSL and the upper air elevation is 5m MSL.

All Manus instruments except the sonde station are at 4m MSL. The sonde launching station 
is at 5m MSL.

• Dummy altitude for Zeb(alt)

• Dummy altitude for Zeb(alt)

• Dummy altitude for Zeb(alt)

TWP/MPL/C1 - SunShade timing problem

For an unknown reason, the sun shade was dropping for less then 10 minutes during the 
night at about 19:00 UTC between Dec 14, 2003 and Feb 17, 2004.  Data taken during that ten 
minute interval is not looking at the sky and should be considered as though it were 
missing.

This is a fairly small effect.  Data users can simply average across the interval or block 
the records as "missing".

• Laser Temperature(laser_temp)
• Aerosol backscatter coefficient at 355 nm(backscatter)
• Filter Temperature(filter_temp)
• Background Signal(background_signal)
• Detector Temperature(detector_temp)
• Dummy altitude for Zeb(alt)
• GPS raw data filename(filename)
• lon(lon)
• Time offset of tweaks from base_time(time_offset)
• Voltage level which operates the A_D card and the detector(voltage_5)
• Voltage level which operates the thermistor(voltage_10)
• Preliminary cloud base height above ground level(cbh)
• Number of laser shots recorded(shots_summed)
• Instrument Temperature(instrument_temp)
• Repetition Rate, or Trigger Frequency of the laser(pulse_rep)
• base time(base_time)
• Laser output energy per pulse(energy_monitor)
• Voltage level which operates the energy monitor(voltage_15)
• lat(lat)

• null(Raw data stream - documentation not supported)

• Height of Center of Each Range Bin(Heights)
• MPL Cloth et al. Algorithm Significance Mask(SigniMaskMplCloth)
• Time offset of tweaks from base_time(time_offset)
• 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/MPL/C1 - SP laser diode supply failed

The Spectra Physics laser diode supply failed on March 2, 2004.  A replacement was 
installed April 18. 

Any data between these dates is worthless.

• Laser Temperature(laser_temp)
• Aerosol backscatter coefficient at 355 nm(backscatter)
• Filter Temperature(filter_temp)
• Background Signal(background_signal)
• Detector Temperature(detector_temp)
• Dummy altitude for Zeb(alt)
• GPS raw data filename(filename)
• lon(lon)
• Time offset of tweaks from base_time(time_offset)
• Voltage level which operates the A_D card and the detector(voltage_5)
• Voltage level which operates the thermistor(voltage_10)
• Preliminary cloud base height above ground level(cbh)
• Number of laser shots recorded(shots_summed)
• Instrument Temperature(instrument_temp)
• Repetition Rate, or Trigger Frequency of the laser(pulse_rep)
• base time(base_time)
• Laser output energy per pulse(energy_monitor)
• Voltage level which operates the energy monitor(voltage_15)
• lat(lat)

• null(Raw data stream - documentation not supported)

• Height of Center of Each Range Bin(Heights)
• MPL Cloth et al. Algorithm Significance Mask(SigniMaskMplCloth)
• Time offset of tweaks from base_time(time_offset)
• 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/MPL/C1 - Reprocess: Global metadata error

During the time period specified, the global metadata attribute "averaging_int" is 
reported as 30 seconds when the value for this attribute should be 60 seconds.

• Time offset of tweaks from base_time(time_offset)