NSA/VCEIL/C1 - Occasional Data Transmission problems

During this period, there were occasional data transmission problems that lead to cut-off 
data packets at times. These disappeared after ceilometer computer were replaced.

• Raw data stream - documentation not supported

• Lowest cloud base height detected.(first_cbh)
• filename
• lat
• laser_pulse_energy
• window_contamination
• laser_temperature
• Second lowest cloud base height(second_cbh)
• tilt_angle
• status_flag
• lon
• sum_backscatter
• status_string
• background_light
• detection_status
• Third cloud base height(third_cbh)
• alt_highest_signal
• receiver_sensitivity
• Vertical visibility(vertical_visibility)
• measurement_parameters
• alt
• time_offset
• range
• base_time
• Backscatter(backscatter)

• range
• time_offset
• lon
• background_light
• Vertical visibility(vertical_visibility)
• laser_temperature
• status_flag
• status_string
• sum_backscatter
• filename
• Lowest cloud base height detected.(first_cbh)
• tilt_angle
• lat
• window_contamination
• detection_status
• measurement_parameters
• base_time
• alt
• Second lowest cloud base height(second_cbh)
• alt_highest_signal
• Backscatter(backscatter)
• laser_pulse_energy
• receiver_sensitivity
• Third cloud base height(third_cbh)

NSA/VCEIL/C1/C2 - Reprocess: Incorrect serial_number and sum_backscatter fields

Attribute serial_number: In most cases, this field is not representative of the actual 
serial number of the instrument because the value did not change when an instrument changed 
locations or was replaced with a spare.
   
Variable sum_backscatter: An out-of-range condition for the "sum of detected and 
normalized backscatter" was reported as 0 instead of missing (-9999). The valid range is 0 - 
0.0999 /srad.
   
This DQR also applies to a1 and b1 level data collected prior to the begin date.

• sum_backscatter

• sum_backscatter