AWR/MPLCMASK/M1 - Reprocess: Software Error

The MPLCMASK VAP was expecting the MPL to be covered around local solar noon. As a result, 
the algorithm intermittently set much of the data to -9999 during this time period after 
the site transitioned to total darkness during the winter months. During the peak of 
this problem, the impacted fields were set to -9999 from approximately 0:00-2:19 UTC each day.

This information is being provided in a transparent DQR due to the intermittent nature of 
the problem and the fact that the impacted data are already set to -9999 and flagged by 
the automated quality control variables in the VAP. 

A future reprocessing task will correct this problem.

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• Cloud base for each layer(cloud_base_layer)
• Satellite-measured cloud top(cloud_top)
• Cloud mask(cloud_mask)
• Signal to noise ratio of backscatter(backscatter_snr)
• Flag indicating whether the beam was extinguished at indicated cloud top(cloud_top_attenuation_flag)
• Cloud top for each layer(cloud_top_layer)
• Linear depolarization ratio(linear_depol_ratio)
• Number of cloud layers(num_cloud_layers)
• Aerosol volume backscattering coefficient at 355 nm(backscatter)
• Lowest cloud base height(cloud_base)
• Signal to noise ratio for the linear depolarization ratio(linear_depol_snr)
• Number of lidar pulses summed(shots_summed)