AIR902A - Determination of Minimum Distance from Ground Observer to Aircraft for Acoustic Tests

Details Not available for purchase at this time. Document Number: AIR902A Project Initiation: 05-08-2012 Project Number: Revision Number: A Sponsor Name: David Senzig Title Determination of Minimum Distance from Ground Observer to Aircraft for Acoustic Tests Scope A photographic technique is described for determining minimum observer-to-aircraft distances during acoustic "fly-over" tests. Possible sources of error are discussed, and it is shown that with ordinary care results are sufficiently accurate to require no correction. Rationale The current standard relies on the use of photographic film. The proposed revision uses methods of determining distances from digital images.

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