Over 90% of near-Earth resident space objects are on near-circular orbits,others are on elliptical orbits.There are a number of initial orbit determination(IOD)methods designed for near-circular orbits.However,when these methods are applied to high eccentricity orbits,the problem of no solution or inaccurate solution will occur often.On the other hand,applying the range search method or the Gooding method to short-arc angular data will yield a set of IOD solutions.Notably,the semi-major axis(SMA)and eccentricity distributions of such IOD solutions are significantly different for the near-circular and elliptical orbits.Thus,we propose a novel method for determining the orbital eccentricity estimated from short-arc angular data.Experimental results demonstrate that the proposed method can accurately discern whether the orbit is a near-circular or an elliptical one,while also provides a more precise estimate of the eccentricity.Importantly,this method effectively addresses the issue of no solution or inaccurate solution encountered by the range search method and the Gooding method when applied to high elliptical orbits.Consequently,it enhances the applicability of these IOD methods.
ZHANG Zheng-yuan
,
LI Bin
,
ZHAO Guang-yu
,
ZENG Chun-ping
,
YE Zhao
,
SANG Ji-zhang
. A Method to Determine Orbit Eccentricity Determined from Short-arc Angles-only Initial Orbit Determination[J]. Journal of Space Science and Experiment, 2023
, 23(4)
: 46
-55
.
DOI: 10.19963/j.cnki.2096-4099.2023.04.005
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