SGP/MPL/C1 - Metadata errors

The latitude, longitude and altitude of the Micropulse Lidar
(MPL) were incorrectly entered into the ARM database.  The 
correct location of the SGP.C1 MPL is:
   Lat: 36.606N
   Lon: 97.485W
   Alt:    316m

• lon(lon)
• Dummy altitude for Zeb(alt)
• lat(lat)

Continuing signal degradation

Despite recent efforts (970310-970314) by the instrument mentor, signal 
degradation of the MPL has continued.  The degradation has continued to the 
point that the effective range of the MPL is nearing 10 km.  The instrument mentor and PI 
have 
concluded that an overhaul of the instrument by the vendor is in order.

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

• (Development raw data stream - documentation not supported)

• lat(lat)
• Time offset of tweaks from base_time(time_offset)
• Dummy altitude for Zeb(alt)
• base time(base_time)
• Preliminary cloud base height above ground level(cbh)
• lon(lon)