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Proceedings Paper

Investigating prior probabilities in a multiple hypothesis test for use in space domain awareness
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Paper Abstract

The goal of this research effort is to improve Space Domain Awareness (SDA) capabilities of current telescope systems through improved detection algorithms. Ground-based optical SDA telescopes are often spatially under-sampled, or aliased. This fact negatively impacts the detection performance of traditionally proposed binary and correlation-based detection algorithms. A Multiple Hypothesis Test (MHT) algorithm has been previously developed to mitigate the effects of spatial aliasing. This is done by testing potential Resident Space Objects (RSOs) against several sub-pixel shifted Point Spread Functions (PSFs). A MHT has been shown to increase detection performance for the same false alarm rate. In this paper, the assumption of a priori probability used in a MHT algorithm is investigated. First, an analysis of the pixel decision space is completed to determine alternate hypothesis prior probabilities. These probabilities are then implemented into a MHT algorithm, and the algorithm is then tested against previous MHT algorithms using simulated RSO data. Results are reported with Receiver Operating Characteristic (ROC) curves and probability of detection, Pd, analysis.

Paper Details

Date Published: 13 May 2016
PDF: 11 pages
Proc. SPIE 9838, Sensors and Systems for Space Applications IX, 983804 (13 May 2016); doi: 10.1117/12.2220411
Show Author Affiliations
Tyler J. Hardy, Air Force Institute of Technology (United States)
Stephen C. Cain, Air Force Institute of Technology (United States)

Published in SPIE Proceedings Vol. 9838:
Sensors and Systems for Space Applications IX
Khanh D. Pham; Genshe Chen, Editor(s)

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