Conventional immersion aircraft thermometers suffer significant performance limitations, particularly for high- speed aircraft and at high angles-of-attack and side-slip. Moreover, immersion thermometers cannot perform through hot thick aircraft boundary layers and greatly increase the radar cross section of low observable aircraft. OPHIR Corporation has developed passive, remote-sensing thermometers which overcome these significant limitations. In addition, we have developed range-resolved radiometers to provide temperature profiles. Range resolved temperature profiles may enable Clear Air Turbulence, air density fluctuations and other flight hazards to be detected well ahead of the aircraft. A review of OPHIR's radiometer technology is presented. The fundamentals of radiant gas thermometry are introduced. Single wavelength 4.255 micrometer and 15 micrometer radiometers and range- resolved 15 micrometer radiometers are discussed as are data collected from numerous fight test programs. Finally, a laboratory demonstration of the multi-range capabilities of radiometers is discussed.
Airborne air temperature radiometers
Environmental Monitoring and Remediation Technologies II ; 1999 ; Boston,MA,USA
Proc. SPIE ; 3853
1999-12-21
Conference paper
Electronic Resource
English
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