Subject: | SGP/VCEIL/B4 - Receiver failure |
DataStreams: | sgpvceil25kB4.00, sgpvceil25kB4.b1, sgpvceil25kB4.a1
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Description: | The receiver failed abruptly just a few minutes after 00:00 UTC on Dec. 12, 2002. The
problem was resolved by replacement of the broken ceilometer with a working ceilometer on
Jan. 10, three days after the problem was PIFed. |
Suggestions: | Do not use ceilometer data from this site between 12/21/2002 and 01/09/2003. |
Measurements: | sgpvceil25kB4.a1: - Laser temperature(laser_temperature)
- Degrees from vertical (-15 to +90)(tilt_angle)
- Flag indicating aeri retrieval status(status_flag)
- Detection status.(detection_status)
- Distance to the center of the corresponding range bin(range)
- Raw data filename(filename)
- Percentage of nominal factory setting (0 to 999%)(receiver_sensitivity)
- Warning, alarm, and internal status information(status_string)
- North Latitude(lat)
- Vertical visibility(vertical_visibility)
- -180.0 - +180.0(alt)
- Starting elevations(altitude_tags)
- Lowest cloud base height detected.(lowest_cloud_base_ht)
- Millivolts at internal ADC input (0 to 2500)(background_light)
- Aerosol volume backscattering coefficient at 355 nm(backscatter)
- Third cloud base height(third_cbh)
- base time in epoch(base_time)
- lon(lon)
- Parameter scale(parameter_scale)
- Time offset from base_time(time_offset)
- 6 character string describing instrument measurement parameters(measurement_parameters)
- Second lowest cloud base height(second_cbh)
- Percentage of nominal factory setting (0 to 999%)(laser_pulse_energy)
- Sum of detected and normalized backscatter(sum_backscatter)
- Lowest cloud base height detected(first_cbh)
- Altitude of highest signal(alt_highest_signal)
- Window contamination(window_contamination)
more
sgpvceil25kB4.00: - (Raw data stream - documentation not supported)
more
sgpvceil25kB4.b1: - Degrees from vertical (-15 to +90)(tilt_angle)
- Lowest cloud base height detected(first_cbh)
- Third cloud base height(third_cbh)
- Altitude of highest signal(alt_highest_signal)
- Aerosol volume backscattering coefficient at 355 nm(backscatter)
- Vertical visibility(vertical_visibility)
- Distance to the center of the corresponding range bin(range)
- Millivolts at internal ADC input (0 to 2500)(background_light)
- Flag indicating aeri retrieval status(status_flag)
- lon(lon)
- Window contamination(window_contamination)
- Laser temperature(laser_temperature)
- Warning, alarm, and internal status information(status_string)
- Percentage of nominal factory setting (0 to 999%)(laser_pulse_energy)
- Percentage of nominal factory setting (0 to 999%)(receiver_sensitivity)
- 6 character string describing instrument measurement parameters(measurement_parameters)
- Sum of detected and normalized backscatter(sum_backscatter)
- Second lowest cloud base height(second_cbh)
- Time offset from base_time(time_offset)
- base time in epoch(base_time)
- -180.0 - +180.0(alt)
- Detection status.(detection_status)
- North Latitude(lat)
more
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