TWP/VCEIL/C1 - Data dropouts

The Manus ceilometer was not receiving complete data packs from the ceilometer. This 
occurred at irregular intervals up to 3-10 times per hour until an error occurred and the 
computer locked up.  The data were not affected when they were successfully collected.  Days 
on which the data are missing for more than 1 hour are listed below.  Some maintenance 
was done on the ceilometer data computer in November and the computer was ultimately 
replace on 3 January 2005.

year.month.day
2004.09.29
2004.10.03
2004.10.04
2004.10.07
2004.10.10
2004.10.11
2004.10.12
2004.10.13
2004.10.14
2004.10.17
2004.10.18
2004.10.22
2004.10.25
2004.10.26
2004.10.27
2004.10.28
2004.10.29
2004.10.30
2004.11.15

Available data are ok but there are significant gaps.

• (Raw data stream - documentation not supported)

• Flag indicating aeri retrieval status(status_flag)
• -180.0 - +180.0(alt)
• 6 character string describing instrument measurement parameters(measurement_parameters)
• Second lowest cloud base height(second_cbh)
• Percentage of nominal factory setting (0 to 999%)(receiver_sensitivity)
• Third cloud base height(third_cbh)
• Detection status.(detection_status)
• Raw data filename(filename)
• base time in epoch(base_time)
• Vertical visibility(vertical_visibility)
• Laser temperature(laser_temperature)
• Window contamination(window_contamination)
• Sum of detected and normalized backscatter(sum_backscatter)
• Distance to the center of the corresponding range bin(range)
• lon(lon)
• Warning, alarm, and internal status information(status_string)
• Time offset from base_time(time_offset)
• Percentage of nominal factory setting (0 to 999%)(laser_pulse_energy)
• Degrees from vertical (-15 to +90)(tilt_angle)
• Altitude of highest signal(alt_highest_signal)
• Aerosol volume backscattering coefficient at 355 nm(backscatter)
• Lowest cloud base height detected(first_cbh)
• Millivolts at internal ADC input (0 to 2500)(background_light)
• North Latitude(lat)