Accession Number : ADA303307

Title :   A Comparison of Aircraft Icing Forecast Models.

Descriptive Note : Technical note,

Corporate Author : AIR FORCE COMBAT CLIMATOLOGY CENTER SCOTT AFB IL

Personal Author(s) : Cornell, Daniel ; Donahue, Christopher A. ; Keith, Chan

PDF Url : ADA303307

Report Date : DEC 1995

Pagination or Media Count : 39

Abstract : This report documents the results of a study comparing forecasted aircraft icing conditions to pilot reports (PIREPs) of aircraft icing. Of the three operational forecast algorithms validated (AF Global Weather Central's RAOB routine, icing routines in the Navy's NODDS, and TESS software), RAOB had the overall best comparison to the PIREPs and 6% percent of the type forecasts and 42 percent of the intensity forecasts agreeing with the reported icing. These percentages increase to 73 percent (type) and 53 (intensity) when considering only PIREPs from jet aircraft. The greatest degree of error was associated with forecasts of clear and mixed icing and icing of moderate intensity.

Descriptors :   *ICE FORMATION, *WEATHER FORECASTING, *JET AIRCRAFT, COMPUTER PROGRAMS, ALGORITHMS, FREQUENCY, TURBOPROP ENGINES, COMPARISON, PROBABILITY, ATMOSPHERIC TEMPERATURE, INTENSITY, JET ENGINES, METEOROLOGICAL DATA, ERRORS, ADVERSE CONDITIONS, STATISTICAL ANALYSIS, MEAN, CLIMATOLOGY, STANDARD DEVIATION, LAPSE RATE, PISTON ENGINES, DEPRESSION ANGLES, DEW POINT.

Subject Categories : Aircraft
      Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE