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This Defense Intelligence Reference Document from the Defense Intelligence Agency, dated 20 November 2010, was one of a series of advanced technology reports produced in FY 2010 under the Advanced Aerospace Weapon System Applications (AAWSA) Program. It reviews the theory of subsonic, supersonic and hypersonic flow. It then compares electromagnetic, optical, and acoustic and seismic methods for detecting and tracking hypersonic objects, and it makes four recommendations for progress over the next 30 years.
UNCLASSIFIED; ;reR: 9PPll!ltllt '1181! tH•tY Contents Introduction .............................................................................................................. 1 Chapter 1: Theory Governing Objects in Flight ............................................................... 3 Subsonic Flow and Drag .......................................................................................... 3 Supersonic Flow ..................................................................................................... 6 Chapter 2: Hypersonic Compressible Flow Theory ......................................................... 10 Chapter 3: Detection Technologies ............................................................................. 11 Electromagnetic Methods ....................................................................................... 13 RADAR (Reflected Energy) .................................................................................. 13 Doppler RADAR ................................................................................................. 14 Radio Reflection Detection .................................................................................. 15 Optical Methods ................................................................................................... 16 Sky Cameras and Photographic Methods ............................................................... 16 Infrared Detection ............................................................................................. 17 LIDAR .............................................................................................................. 23 Acoustic and Seismic Methods ................................................................................ 25 Infrasound ....................................................................................................... 25 Seismic ............................................................................................................ 27 Chapter 4: Vision of Progress Over the Next 30 Years ................................................... 28 Detectability of New Hypersonic Aircraft ................................................................... 29 Recommendation #1 - Build a Database of the Wake Characteristics for Existing Aircraft ...................................................................................................................... 29 Recommendation #2 - Exploit the Detectability of Hypersonic Aircraft Based on the Features That Allow Them To Fly Efficiently at High Speeds ..................................... 30 Recommendation #3 - Explore the Detection of Vehicles Designed To Be Undetectable30 Recommendation #4 - Explore the Development of Novel Detectors ......................... 31 Summary ............................................................................................................ 31 iii UNCLASSIFIED/ /F8~ QFFICIOI l!SF ANI X
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Report, from the dia collection. The PDF is mirrored here; the original link is above. 46 pages are in the text index: search them above, or from the library's search.