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search.filters.applied.f.advisor: Lovell, T. Alan × End date: 2013 × Start date: 2011 × search.filters.applied.f.isSeriesOfPublicationTitle: Master of Science in Aerospace Engineering × search.filters.applied.f.resourcesubtype: Masters Project ×

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Relative Navigation for Satellites in Close Proximity Using Angles-Only Observations

2011-12-01 , Patel, Hemanshu

Relative navigation using angles-only observations is explored in this research. Previous work has shown that the unique relative orbit of a deputy satellite cannot be found using angles-only camera measurements from the chief satellite when a linear model of relative motion is used, due to a lack of observability. This work examines the possibility of partial observability in this case, which consists of a basis vector that corresponds to a family of relative orbits. A Preliminary Orbit Determination (POD) method is introduced that uses 3 Line-Of-Sight (LOS) measurements and provides an initial guess for the basis vector. This guess is differentially corrected with a batch filter that takes in a full set of LOS measurements to hone in on a converged solution for the basis vector. The application of an Extended Kalman Filter (EKF) to this problem is also explored.

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