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The processing of IMU data in ENTREE implementation and preliminary resultsIt is demonstrated that the shuttle entry trajectory can be accurately represented in ENTREE with IMU data available postflight. The IMU data consist of platform to body quaternions, and accumulated sensed velocities in mean of fifty (M50) coordinates approximately every second. The preprocessing software required to incorporate the IMU data in ENTREE is described as well as the relatively minor code changes to the ENTREE program itself required to process the IMU data. Code changes to the ENTREE program and input tape data format and content changes are described.
Document ID
19820012296
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Heck, M. L. (Analytical Mechanics Associates, Inc. Hampton, VA, United States)
Date Acquired
September 4, 2013
Publication Date
October 1, 1980
Subject Category
Aircraft Communications And Navigation
Report/Patent Number
AMA-80-23
NAS 1.26:165879
NASA-CR-165879
Accession Number
82N20170
Funding Number(s)
CONTRACT_GRANT: NAS1-16087
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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