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A SPEARMAN CORRELATION BASED STAR PATTERN RECOGNITION

Citation Author(s):
Shoushun Chen
Submitted by:
Deval Mehta
Last updated:
8 September 2017 - 12:08am
Document Type:
Poster
Document Year:
2017
Event:
Presenters:
Deval Mehta
Paper Code:
1390
 

High accuracy is required for determining the orientation of a satellite in space. Amongst the existing sensors, a star tracker provides a very high accuracy of attitude determination. When no prior attitude is available, it operates in the “Lost-In-Space (LIS)” mode. Star pattern recognition is the most crucial part of a star tracker in the LIS mode. In this paper, a novel star pattern recognition approach is proposed, which constructs a signal from the features extracted in the star image and utilizes spearman correlation for identifying the correct stars. The proposed technique achieves a high identification accuracy of 99.67%. The results from the simulations show that this technique is also highly recognition reliable to the cases of missing stars, deviation in star positions, magnitude uncertainty, and false stars compared to the existing star identification algorithms.

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