TWP/CEIL/C1 - Compensation fiber

The VCEIL was reporting a "receiver optical cross-talk compensation is poor" warning. The 
window was cleaned and the instrument was power-cycled. The problem was corrected when 
the compensation fiber was replaced and ants were removed from communication connector.  
Cloud detection was impaired.

Data is suspect when status_flag = W.

• receiver_sensitivity
• alt_highest_signal
• second_cbh
• sum_backscatter
• first_cbh
• laser_pulse_energy
• third_cbh
• backscatter
• background_light
• vertical_visibility