Ground-Based Sensors for the SR-71 Sonic Boom Propagation Experiment
Norris, Stephen R. and Haering Jr., Edward A. and Murray, James E. (1996) Ground-Based Sensors for the SR-71 Sonic Boom Propagation Experiment. In Proceedings 1995 NASA High-Speed Research Program Sonic Boom Workshop 1, pages 199-219, Langley Research Center, Hampton, Virginia.
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Abstract
This paper describes ground-level measurements of sonic boom signatures made as part of the SR-71 sonic boom propagation experiment recently completed at NASA Dryden Flight Research Center, Edwards, California. Ground-level measurements were the final stage of this experiment which also included airborne measurements at near and intermediate distances from an SR-71 research aircraft. Three types of sensors were deployed to three station locations near the aircraft ground track. Pressure data were collected for flight conditions from Mach 1.25 to Mach 1.60 at altitudes from 30,000 to 48,000 ft. Ground-level measurement techniques, comparisons of data sets from different ground sensors, and sensor system strengths and weaknesses are discussed. The well-known N-wave structure dominated the sonic boom signatures generated by the SR-71 aircraft at most of these conditions. Variations in boom shape caused by atmospheric turbulence, focusing effects, or both, were observed for several flights. Peak pressure and boom event duration showed some dependence on aircraft gross weight. The sonic boom signatures collected in this experiment are being compiled in a data base for distribution in support of the High Speed Research Program.
| EPrint Type: | Conference or Meeting Presentation |
|---|---|
| Keywords: | SR-71 aircraft, Sensors, Sonic boom |
| Subjects: | Aircraft/Project: SR-71 Blackbird |
| ID Code: | 1839 |
| Deposited On: | 14 Febuary 2008 |
| Additional Information: | 21 pages. Norris, Haering Jr., Murray, NASA Dryden Flight Research Center. In NASA Conference Publication 3335, Volume 1, Paper 10, pp. 199-219. |
