SGP/VCEIL/B6 - contaminated window

The window was contamined with bird droppings producing a status warning and causing the 
backscatter plot to have a higher than normal amplitude. The problem was corrected when 
the window was cleaned during regular preventative maintenance.

• Lowest cloud base height detected(first_cbh)
• Sum of detected and normalized backscatter(sum_backscatter)
• Second lowest cloud base height(second_cbh)
• Vertical visibility(vertical_visibility)
• Third cloud base height(third_cbh)
• Aerosol volume backscattering coefficient at 355 nm(backscatter)
• Altitude of highest signal(alt_highest_signal)