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Proceedings Paper

Parametric study of the effect of viewing geometry on mono and stereo tracking
Author(s): Karl C. Stengel
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Paper Abstract

This study considers a satellite-mounted sensor in a 1000-km circular orbit. The sensor is initially placed North, South, East, or West of a ballistic target, at a variety of initial ranges from 500 km to over 3000 km. The initial angle between the sensor and target velocity vectors is varied, from near zero degrees to roughly 180 degrees, in steps of 30 degrees. The tracking algorithm used is a standard Kalman filter. The track errors as a function of track time for several track data rates (once every 2 to 20 seconds) are examined. The error is defined to be the maximum eigenvalue of the covariance matrix. Both the current covariance matrix and the matrix propagated to impact are studied. The study is done for a variety of angular measurement errors, from one microradian to over 100 microradians. The best tracking performance seldom occurs when the target and sensor velocity vectors are crossing, as might be intuitively expected. The track error is very nearly linear with angular error. While increasing the data rate improves tracking performance, doubling the data rate does not improve performance nearly as much as doubling the total track time. The tracking performance does not automatically degrade with inithi range, as might be expected. Once a good track is obtained, further updates to the track can be very infrequent (less than once per 100 seconds), and the track will still improve steadily with time. Stereo tracking, as might be expected, offers dramatically better results than mono tracking.

Paper Details

Date Published: 1 October 1993
PDF: 9 pages
Proc. SPIE 1950, Acquisition, Tracking, and Pointing VII, (1 October 1993); doi: 10.1117/12.156903
Show Author Affiliations
Karl C. Stengel, Nichols Research Corp. (United States)

Published in SPIE Proceedings Vol. 1950:
Acquisition, Tracking, and Pointing VII
Michael K. Masten; Larry A. Stockum, Editor(s)

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