Accession Number : AD0757501

Title :   An Investigation of a Vertically Scanning Infrared Radiometer as a Clear Air Turbulence Warning System.

Descriptive Note : Final rept. 1 Oct 71-31 Oct 72,

Corporate Author : EASTERN AIR LINES INC MIAMI FLA ENGINEERING DEPT

Personal Author(s) : Jones,Dale N.

Report Date : DEC 1972

Pagination or Media Count : 103

Abstract : Over 350 flight hours were flown on a specially instrumented DC8-61 in regular passenger-carrying service. The aircraft was instrumented with an Infrared Clear Air Turbulence stabilized remote-temperature sensor and a digital recording system. All flights were accomplished with specially trained research observers occupying a cockpit jump-seat making detailed records of atmospheric conditions and significant events. Approximately 200 hours of cruise-level recordings were obtained and analyzed. It was found that all clear air turbulence encountered during cruise-level flight was associated with measurable horizontal temperature gradients. On the other hand, only half of the observed temperature changes were associated with vertical accelerations of +0.1 'g' or greater. The flight records contain meager evidence that clear air turbulence severity may be associated with the magnitude of horizontal temperature change. (Author Modified Abstract)

Descriptors :   (*METEOROLOGICAL INSTRUMENTS, CLEAR AIR TURBULENCE), (*CLEAR AIR TURBULENCE, WARNING SYSTEMS), AIRCRAFT EQUIPMENT, INFRARED DETECTORS, RADIOMETERS, AVIATION SAFETY, FLIGHT TESTING

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE