SGP/RL - Raman lidar out of alignment

The Raman lidar was returned to service after a laser repair on 2/10/2000.
During normal instrument startup, the system attempts to optimize the 
alignment of the outgoing laser beam in the detector's field-of-view.
Occassionally, this routine fails to do this successfully, but subsequent
alignment "tweaks" (which typically occur every three hours) will usually
readjust the system and thus any periods of data related to poor alignment
are kept short.  However, shortly after system startup on the 10th, low
clouds moved in overhead which prevented the system from re-optimizing
itself.  To make matters worse, the system slowly drifted further out
of alignment, and thus when the sky conditions improved the system was
unable to correct its misalignment.  Site operations performed a restart
on Monday morning (2/14 around 1430 UT) which returned the lidar to its
nominal alignment.  Data from this period, especially the narrow field-of-
view data, will be greatly affected by this misalignment and probably 
should not be used.

• east longitude for all the input platforms.(lon)
• Number of photons counted in the high depolarization channel(depolarization_counts_high)
• Number of photons counted in the high elastic (aerosol) channel(elastic_counts_high)
• altitude above sea levelaltunits(alt)
• Number of photons counted in the low elastic (aerosol) channel(elastic_counts_low)
• Time offset of tweaks from base_time(time_offset)
• Time offset from base_time(base_time)
• Number of photons counted in the low nitrogen channel(nitrogen_counts_low)
• north latitude for all the input platforms.(lat)
• Number of photons counted in the high water vapor channel(water_counts_high)
• Number of photons counted in the high nitrogen channel(nitrogen_counts_high)
• Laser pulse energy(pulse_energy)
• Nominal number of seconds of data acquired(acquisition_time)
• Number of laser pulses summed during measurement interval(shots_summed)
• Number of photons counted in the low water vapor channel(water_counts_low)
• Flag indicating the filters (or lack of) added to the instrument(filter)

SGP/RL/C1 - Metadata errors

The latitude, longitude and altitude of the Raman Lidar were
incorrectly entered into the ARM database.  The correct location
of the SGP.C1 Raman Lidar is:
      Lat: 36.609N
      Lon: 97.487W
      Alt:    311m

• east longitude for all the input platforms.(lon)
• north latitude for all the input platforms.(lat)
• altitude above sea levelaltunits(alt)