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

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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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