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The NASA Icing Remote Sensing SystemNASA and the U.S. Army Cold Regions Research and Engineering Laboratory (CRREL) have an on-going activity to develop remote sensing technologies for the detection and measurement of icing conditions aloft. A multiple instrument approach is the current emphasis of this activity. Utilizing radar, radiometry, and lidar, a region of supercooled liquid is identified. If the liquid water content (LWC) is sufficiently high, then the region of supercooled liquid cloud is flagged as being an aviation hazard. The instruments utilized for the current effort are an X-band vertical staring radar, a radiometer that measures twelve frequencies between 22 and 59 GHz, and a lidar ceilometer. The radar data determine cloud boundaries, the radiometer determines the sub-freezing temperature heights and total liquid water content, and the ceilometer refines the lower cloud boundary. Data are post-processed with a LabVIEW program with a resultant supercooled LWC profile and aircraft hazard identification. Remotely sensed measurements gathered during the 2003-2004 Alliance Icing Research Study (AIRS II) were compared to aircraft in-situ measurements. Although the comparison data set is quite small, the cases examined indicate that the remote sensing technique appears to be an acceptable approach.
Document ID
20050175843
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Authors
Reehorst, Andrew L.
(NASA Glenn Research Center Cleveland, OH, United States)
Brinker, David J.
(NASA Glenn Research Center Cleveland, OH, United States)
Ratvasky, Thomas P.
(NASA Glenn Research Center Cleveland, OH, United States)
Ryerson, Charles C.
(Army Cold Regions Research and Engineering Lab. Hanover, NH, United States)
Koenig, George G.
(Army Cold Regions Research and Engineering Lab. Hanover, NH, United States)
Date Acquired
September 7, 2013
Publication Date
April 1, 2005
Subject Category
Air Transportation And Safety
Report/Patent Number
Paper -80776
E?15059
NASA/TM?2005-213591
Meeting Information
Meeting: 11th Conference on Aviation, Range, and Aerospace Meteorology
Location: Hyannis, MA
Country: United States
Start Date: October 4, 2004
End Date: October 8, 2004
Sponsors: American Meteorological Society
Funding Number(s)
CONTRACT_GRANT: WBS 22-728-41-05
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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