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Proceedings Paper

Concept, simulation, and instrumentation for radiometric inflight icing detection
Author(s): Charles C. Ryerson; George G. Koenig; Andrew L. Reehorst; Forrest R. Scott
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Paper Abstract

The multi-agency Flight in Icing Remote Sensing Team (FIRST), a consortium of the National Aeronautics and Space Administration (NASA), the Federal Aviation Administration (FAA), the National Center for Atmospheric Research (NCAR), the National Oceanographic and Atmospheric Administration (NOAA), and the Army Corps of Engineers (USACE), has developed technologies for remotely detecting hazardous inflight icing conditions. The USACE Cold Regions Research and Engineering Laboratory (CRREL) assessed the potential of onboard passive microwave radiometers for remotely detecting icing conditions ahead of aircraft. The dual wavelength system differences the brightness temperature of Space and clouds, with greater differences potentially indicating closer and higher magnitude Cloud Liquid Water Content (CLWC). The Air Force RADiative TRANsfer model (RADTRAN) was enhanced to assess the flight track sensing concept, and a "flying" RADTRAN was developed to simulate a radiometer system flying through simulated clouds. Neural network techniques were developed to invert brightness temperatures and obtain integrated cloud liquid water. In addition, a dual wavelength Direct-Detection Polarimeter Radiometer (DDPR) system was built for detecting hazardous drizzle drops. This paper reviews technology development to date and addresses initial polarimeter performance.

Paper Details

Date Published: 25 August 2008
PDF: 14 pages
Proc. SPIE 7088, Remote Sensing Applications for Aviation Weather Hazard Detection and Decision Support, 70880L (25 August 2008); doi: 10.1117/12.794070
Show Author Affiliations
Charles C. Ryerson, Cold Regions Research and Engineering Lab. (United States)
George G. Koenig, Cold Regions Research and Engineering Lab. (United States)
Andrew L. Reehorst, NASA Glenn Research Ctr. (United States)
Forrest R. Scott, Sensor Concepts and Applications, Inc. (United States)

Published in SPIE Proceedings Vol. 7088:
Remote Sensing Applications for Aviation Weather Hazard Detection and Decision Support
Wayne F. Feltz; John J. Murray, Editor(s)

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