Autonomous initial orbit determination method based on remote sensing image

Abstract

The invention discloses a spacecraft autonomous initial orbit determination method based on a remote sensing image. The spacecraft autonomous initial orbit determination method comprises the followingsteps of: S1, carrying out matching recognition of ground feature points in the remote sensing image, and generating a sight vector observed quantity for initial orbit determination; S2, aiming at whether the ground feature points are priori known or not, respectively establishing initial orbit determination observation models; and S3, iteratively solving an initial orbit of a spacecraft by adopting a generalized Laplace method in combination with an orbit dynamics model by utilizing the acquired initial orbit determination observed quantity. The spacecraft autonomous initial orbit determination method utilizes the feature information in the remote sensing image, derives orbit determination observation models under two conditions according to whether ground characteristic point information is priori known or not, and realizes autonomous initial orbit determination of the spacecraft by taking sight vectors at different moments as observed quantities. The autonomous initial orbit determination method provided by the invention is suitable for priori conditions of different features, has higher flexibility, and improves the reliability of on-orbit operation of the spacecraft.

Description

technical field [0001] The invention belongs to the field of spacecraft initial orbit determination, and in particular relates to a method for autonomous initial orbit determination of a spacecraft based on remote sensing images. Background technique [0002] In the orbit determination of spacecraft, it mainly relies on ground measurement and control means. As the number of spacecraft in orbit continues to grow, the amount of information transmission increases sharply, and the burden on ground measurement and control stations becomes heavier and heavier. As a result, the probability of errors and the cost of measurement and control also increase. In addition, relying on the ground station will increase the safety risk of the spacecraft when it encounters interference or communication and navigation system failure, and weaken the survivability of the spacecraft. Based on the above points, the autonomous orbit determination of spacecraft will be the future trend of aerospace ...

AI Technical Summary

Problems solved by technology

The quality of the initial value of the orbit also directly affects the convergence speed and the number of iterations of the orbit determination filter, which in turn affects the orbit determination performance

Existing studies on initial orbit determination of spacecraft are mainly carried out under ground-based and space-based observation platforms, based on different types of observations such as angle measurement, ranging, and speed measurement, and there is a lack of research on initial orbit determination that relies on autonomous navigation observations of probes

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