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SCAMP: Rapid Focused Sonic Boom Waypoint Flight Planning Methods, Execution, and ResultsSuccessful execution of the flight phase of the Superboom Caustic Analysis and Measurement Project (SCAMP) required accurate placement of focused sonic booms on an array of prepositioned ground sensors. While the array was spread over a 10,000-ft-long area, this is a relatively small region when considering the speed of a supersonic aircraft and sonic boom ray path variability due to shifting atmospheric conditions and aircraft trajectories. Another requirement of the project was to determine the proper position for a microphone-equipped motorized glider to intercept the sonic boom caustic, adding critical timing to the constraints. Variability in several inputs to these calculations caused some shifts of the focus away from the optimal location. Reports of the sonic booms heard by persons positioned amongst the array were used to shift the focus closer to the optimal location for subsequent passes. This paper describes the methods and computations used to place the focused sonic boom on the SCAMP array and gives recommendations for their accurate placement by future quiet supersonic aircraft. For the SCAMP flights, 67% of the foci were placed on the ground array with measured positions within a few thousand feet of computed positions. Among those foci with large caustic elevation angles, 96% of foci were placed on the array, and measured positions were within a few hundred feet of computed positions. The motorized glider captured sonic booms on 59% of the passes when the instrumentation was operating properly.
Document ID
20130003184
Acquisition Source
Armstrong Flight Research Center
Document Type
Conference Paper
Authors
Haering, Edward A., Jr. (NASA Dryden Flight Research Center Edwards, CA, United States)
Cliatt, Larry J., II (NASA Dryden Flight Research Center Edwards, CA, United States)
Delaney, Michael M., Jr. (NASA Dryden Flight Research Center Edwards, CA, United States)
Plotkin, Kenneth J. (Wyle Labs., Inc. Arlington, VA, United States)
Maglieri, Domenic J. (Eagle Aeronautics, Inc. Newport News, VA, United States)
Brown, Jacob C. (Tybrin Corp. Edwards AFB, CA, United States)
Date Acquired
August 27, 2013
Publication Date
December 19, 2012
Subject Category
Acoustics
Report/Patent Number
DFRC-E-DAA-TN6916
Meeting Information
Meeting: Industry Panel Presentation at the University of Southern California
Location: Los Angeles, CA
Country: United States
Start Date: November 3, 2017
Sponsors: American Inst. of Aeronautics and Astronautics, University of Southern California
Funding Number(s)
TASK: NNL10AB94T
Distribution Limits
Public
Copyright
Public Use Permitted.

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