Kalman smoother applied to LACE
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Authors
Thorngren, Frank R.
Subjects
Ground-based Doppler resolved measurements
LACE
Kalman filter
Fixed interval smoother
Spacecraft structural dynamics
Heterodyne signal
LACE
Kalman filter
Fixed interval smoother
Spacecraft structural dynamics
Heterodyne signal
Advisors
Burl, Jeffrey B.
Date of Issue
1991-12
Date
December 1991
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
The ability to determine the structural dynamics of space-based platforms from ground-based radar resolved Doppler measurements will aid in the study of control/structure interaction. The Naval Research Laboratory and Lincoln Laboratory conducted an experiment to determine the feasibility of this method. To accomplish this experiment the LACE satellite was equipped with retroreflectors and the ground-based Firepond laser radar facility was employed. Vibrational information is found from the difference between the reflected Doppler frequencies of the retroreflectors. The method of extracting the Doppler separation was to obtain the power spectrum of the heterodyne signal envelope. A pulse-by-pulse processing of the data yields the Doppler separation history over time. Due to a relatively large amount of clutter in the processed data, a filtering mechanism was employed. The histogram technique is the current filtering-based method employed to obtain a Doppler separation history. This thesis addresses the implementation of the Kalman filter algorithm in conjunction with the Rauch-Tung-Striebel fixed-interval optimal smoother algorithm to perform this filtering task. The Kalman smoother filtering based method of processing the data produced superior results when compared t the histogram filtering based method.
Type
Thesis
Description
Series/Report No
Department
Department of Electrical and Computer Engineering
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
50 p.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.