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Ground-based sensors for the SR-71 sonic boom propagation experimentThis 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.
Document ID
19960008877
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Norris, Stephen R. (NASA Hugh L. Dryden Flight Research Center Edwards, CA, United States)
Haering, Edward A., Jr. (NASA Hugh L. Dryden Flight Research Center Edwards, CA, United States)
Murray, James E. (NASA Hugh L. Dryden Flight Research Center Edwards, CA, United States)
Date Acquired
September 6, 2013
Publication Date
September 1, 1995
Subject Category
Aerodynamics
Report/Patent Number
NAS 1.15:104310
NASA-TM-104310
H-2062
Meeting Information
Meeting: NASA High Speed Research Program Sonic Boom Workshop
Location: Hampton, VA
Country: United States
Start Date: September 11, 1995
End Date: September 13, 1995
Accession Number
96N16043
Funding Number(s)
PROJECT: RTOP 537-03-21
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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