Remote sensor observations during WISP90: the use of microwave radiometers, RASS, and ceilometers for detection of aircraft icing conditions
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Remote sensor observations during WISP90: the use of microwave radiometers, RASS, and ceilometers for detection of aircraft icing conditions

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Remote sensor observations during WISP90: the use of microwave radiometers, RASS, and ceilometers for detection of aircraft icing conditions

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  • Description:
    During February and March 1990, the National Center for Atmospheric Research, the NOAA Wave Propagation Laboratory, and the NOAA Forecast Systems Laboratory conducted the Winter Icing and Storms Project (WISP). One of the principal objectives was to determine the utility of unattended microwave radiometers in detecting atmospheric liquid water and providing input to forecasts of aircraft icing. Arrays of microwave radiometers, infrared radiometers, lidar ceilometers, and radio-acoustic sounding systems were used to determine spatial and temporal distribution of supercooled liquid water. Results are presented from four representative cases to demonstrate that the integrated system, which comprises a microwave water substance radiometer, a radio-acoustic sounding system, and a ceilometer, can identify supercooled liquid water. Occasional outages because of enviromental effects on the radiometer antenna were encountered, and quality control procedures were employed to detect erroneous data. Outage statistics are presented; 15% of the data obtained during 10 WISP intensive observation periods were rejected. Recomendations to improve system performance and usage for future experiments are presented.
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