Precise orbit determination method for lunar probe

Abstract

The invention discloses a precise orbit determination method for a lunar probe. An observation model and a dynamical model are organically combined, and therefore the parameters of the dynamical model are introduced into a combination model; different reference systems related by the combination model are unified, so that the connection parameters of the reference systems are introduced into the combination model. Thus, a new module for simultaneously improving the connection parameters of the reference system related by the combination model, the initial state parameters of the probe and the perturbation model parameters of dynamical orbit determination of a flight phase of the probe is established, the prior precision of the parameters can be improved by the model and observation data, and the orbit determination precision of the lunar probe is improved.

Description

technical field [0001] The invention belongs to the technical field of lunar exploration, and relates to a method for precise orbit determination of a lunar probe, in particular to a lunar probe which utilizes very long baseline interferometry (VLBI) observation and simultaneously estimates earth rotation parameters and mechanical model parameters Precision Orbit Determination Method. Background technique [0002] The precise position information of the lunar probe is very important to realize the lunar exploration plan, scientific goals and study the environment of the earth and the moon. VLBI technology is widely used in the field of deep space exploration. Many deep space probes in the world have successfully used VLBI technology in the real-time orbit measurement process. In my country's lunar exploration project, VLBI technology has also been applied to the tracking and measurement and control of Chang'e series probes, which are described in relevant literature. [00...

AI Technical Summary

Problems solved by technology

Due to the inaccurate parameters of the dynamic empirical model, the accuracy of the given numerical integration position is affected, thereby affecting the accuracy of determining the detector position using observations

The connection parameters between different reference systems in the current observation model directly use the prior information provided by the observation system other than this observation system, and its accuracy level will also affect the positioning accuracy of the lunar probe.

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