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Abstract:
Efficient storage and quick access to covariance data are important aspects of
orbit catalog maintenance and conjunction analysis (CA). The catalog and CA
access and storage requirements cannot accommodate running a complete estimation process whenever orbit state and covariance are requested at some time.
Instead, ephemeris and reduced covariance data are recorded at discrete times.
Covariance interpolation from tabulated data must preserve positive definiteness
and evolve covariance similar to the estimation process. This paper describes a
new covariance interpolation method which blends approximate state error transitions anchored at end points of interpolation interval to produce accurate physically meaningful covariance.
Keywords:
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Citation:
Tanygin, S., “Efficient Covariance Interpolation Using Blending of Approximate State Error Transitions," Paper AAS 13-762, AAS/AIAA Astrodynamics Specialist Conference, Hilton Head, SC, August 2013, accessible at https://comspoc.com/Resources/Content/Private/C-20220422T155918/Paper/Efficient-Covariance-Interpolation-using-Blending-of-Approximate-State-Error-Transitions.pdf.
