Accession Number:

ADA160578

Title:

The Aircraft Icing Environment in Wintertime, Low Ceiling Conditions.

Descriptive Note:

Final rept.,

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC

Report Date:

1985-10-28

Pagination or Media Count:

74.0

Abstract:

Radiosonde Raob temperature and humidity data were used to deduce the vertical distribution of clouds and aircraft icing conditions near Washington, DC when low ceilings - or 1000 ft03 km occurred along with surface temperatures near freezing. Automated predictions of the vertical distribution of icing probability, type, and severity were generated from the Raob data. The technique employs a U.S. Air Force method that has been computerized by one of the authors RKJ for use on Hewlett Packard model 9845 computers. The predictions were compared with pilot reports from the vicinity and reasonable agreement was found. Results Vertical Distribution of Clouds Above Cold, Low Ceilings Effects of Local Topography on Height of Cold, Low Ceilings Vertical Profiles of Icing Conditions Computation of Icing Conditions from Raob Data Comparison of Forecasted Icing Conditions with Pilot Reports.

Subject Categories:

  • Meteorology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE