公开(公告)号：US20210356275A1

公开(公告)日：2021-11-18

申请号：US17245390

申请日：2021-04-30

Applicant: KOREA ASTRONOMY AND SPACE SCIENCE INSTITUTE

Inventor： Eun Jung Choi

IPC: G01C21/24

Abstract: A method of determining a precise orbit of a satellite through estimation of a parallactic refraction scale factor is proposed, the method including inputting an initial estimate including initial orbit information of a satellite with respect to an observation epoch and the parallactic refraction scale factor; performing orbit propagation using a high-precision orbit propagator by applying a dynamics model; performing observer-centered satellite optical observation modeling including the parallactic refraction scale factor; calculating an observation residual between actual optical observation data and observation data calculated via the observation modeling reflecting the parallactic refraction; and precisely determining the orbit of the satellite by estimating the parallactic refraction scale factor and a satellite state vector using a batch least square estimation algorithm.