ASI/CEIL/M1 - data communication

The data were intermittent, especially on 7/19/2016, due to poor serial communication. The 
cable was repaired on 7/21 and the serial device server and instrument were power-cycled 
on 7/28.

• (Raw data stream - documentation not supported)

• Flag indicating aeri retrieval status(status_flag)
• Aerosol volume backscattering coefficient at 355 nm(backscatter)
• Percentage of nominal factory setting (0 to 999%)(laser_pulse_energy)
• Second lowest cloud base height(second_cbh)
• Laser temperature(laser_temperature)
• Vertical visibility(vertical_visibility)
• Sum of detected and normalized backscatter(sum_backscatter)
• Warning, alarm, and internal status information(status_string)
• Range cell bounds(range_bounds)
• Lowest cloud base height detected(first_cbh)
• Third cloud base height(third_cbh)
• Window transmission estimate(window_transmission)
• Degrees from vertical (-15 to +90)(tilt_angle)
• 6 character string describing instrument measurement parameters(measurement_parameters)
• Distance to the center of the corresponding range bin(range)
• Altitude of highest signal(alt_highest_signal)
• Detection status.(detection_status)
• Millivolts at internal ADC input (0 to 2500)(background_light)