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A Method to Improve the Precision of Predicted LEO Space Debris Objects Ephemeris

Liu, Zhonggui1
Affiliation data not available1

Document details

Publishing year2013 PublisherESA Publishing typeConference Name of conference6th European Conference on Space Debris
Pagesn/a Volume
L. Ouwehand


There are two major errors in predict ing Space Object (SO) ephemeris (state vector): one is the error of the Initial Orbital Element (IOE) sets, the other is that of the Dynamical Model (DM). In order to get a better predicted ephemeris, a better IOE or/and DM is needed. This paper aims to seek a method of improving the precision of IOE and PM together. The basic idea is to reduce the error of semi-major axis (a) together with that of the Area-Mass ratio (A/M) by calibrat ion. The fundamental principle is that the error of a and A/M would propagate and augmented with time symmetrical in down-track component, the necessary condition is that the precise ephemeris of the past must be obtained.