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.

Please be aware that this problem will likely impact some statistics computed from 

this data, as there could have been clouds present during the intermittent -9999 periods. 
Please check data from other datastreams such as the awrmplpolfsM1.b1 and awrceilM1.b1 
datastreams for comparison.

• cloud_base_layer
• cloud_top
• cloud_mask
• backscatter_snr
• cloud_top_attenuation_flag
• cloud_top_layer
• linear_depol_ratio
• num_cloud_layers
• backscatter
• cloud_base
• linear_depol_snr
• shots_summed