Initial orbit determination method for deep space target celestial body based on space-based autonomous optical observation

Abstract

The invention discloses an initial orbit determination method for a deep space target celestial body based on space-based autonomous optical observation, relates to an optical autonomous initial orbit determination method for a deep space celestial body, and belongs to the technical field of deep space detection. The method comprises the following implementation steps: 1, acquiring angle measurement information (right ascension beta and declination epsilon) of the target celestial body from a detector; 2, establishing an orbital kinetic equation of the target celestial body under a heliocentric inertia coordinate system; 3, establishing an observation condition equation set of the autonomous initial orbit determination of the detector by utilizing the angular position information of the target celestial body solved in the step 1 and known detector orbit parameter information; and 4, solving the orbital element information of the target celestial body by utilizing a Newton homotopy path following algorithm, thereby realizing initial orbit determination. According to the method disclosed by the invention, the position and speed information of the target celestial body can be accurately acquired in real time in the field of deep space probe navigation, the initial value sensitivity is reduced, the convergence rate, solving success rate and calculation efficiency are improved, and the positioning efficiency is further improved. Moreover, the method is simple in measurement device and easy to implement.

Description

technical field [0001] The invention relates to a method for initial orbit determination of a deep space target celestial body based on space-based autonomous optical observation, and belongs to the technical field of deep space detection. Background technique [0002] The detection and defense of small celestial bodies (such as asteroids, comets, etc.) in the future need to realize real-time positioning of celestial objects. Preliminary orbit determination is the most basic step to determine the orbit of the target celestial body. Through a certain orbit determination method, the preliminary determination, tracking and precise orbit determination of the target orbit can be achieved, and this must be based on the orbit determination method. Provide effective orbit parameters as the premise . Therefore, building an orbit determination method that can efficiently and accurately determine the position and velocity of the target celestial body is the basis for the success of th...

AI Technical Summary

Problems solved by technology

However, due to the long distance of the deep space target, the measurement delay is caused, the observation geometry is poor, and the measurement discontinuity is caused by the occlusion of other stars and the rotation of the earth, making it impossible to accurately determine the orbit information of the deep space target in real time

Images