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Doppler radiation sensing of Shuttle angle of attack and TAS during entrySpace Shuttle true airspeed, angle of attack, and sideslip angle are currently derived from inertial guidance information. A new method is proposed which offers a potential improvement in Shuttle safety during entry. Angle of attack, sideslip angle and true airspeed could be measured directly at heights from 120 km down to 20 km by Doppler sensing three independent true airspeeds along the Shuttle body axes. Two types of Doppler measurement sensors, employing either passive detection of atmospheric radiation or coherent detection of scattered laser light are discussed. The proposed technique is essentially solid-state and robust, and is well suited for use in future small hypersonic vehicles that require flight control in the Upper Atmosphere of the earth or in probes destined for the other planets.
Document ID
19840059569
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Foale, C. M.
(NASA Johnson Space Center Payload Operations and Support Branch, Houston, TX, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1984
Subject Category
Spacecraft Instrumentation
Report/Patent Number
AIAA PAPER 84-2111
Accession Number
84A42356
Distribution Limits
Public
Copyright
Other

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