An Investigation of a Vertically Scanning Infrared Radiometer as a Clear Air Turbulence Warning System.
Final rept. 1 Oct 71-31 Oct 72,
EASTERN AIR LINES INC MIAMI FLA ENGINEERING DEPT
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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