TWP/CEIL/C2 - Nauru Vceil data suspect

During this period the ceilometer began producing a cross-talk warning. Since it is a 
warning, some of the data are OK. However, the instrument began to be limited to detecting 
clouds only about 2 km above the ground.

only use for boundary layer cloud studies.

• range
• receiver_sensitivity
• status_string
• alt_highest_signal
• sum_backscatter
• first_cbh
• second_cbh
• status_flag
• third_cbh
• vertical_visibility
• backscatter