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Method for evaluating spacecraft ranging data precision by utilizing speed measurement data

A data accuracy and spacecraft technology, applied in the field of spacecraft measurement and control, can solve the problems of not being able to objectively and accurately reflect the accuracy of ranging data, and not being able to take into account errors that have not been considered

Active Publication Date: 2020-06-19
NO 63921 UNIT OF PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In principle, theoretical calculations cannot take into account errors other than the model that have not been considered, and the residual after fitting after orbit determination is usually additionally affected by orbit determination errors
Therefore, none of the above methods can objectively and accurately reflect the accuracy of ranging data.

Method used

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  • Method for evaluating spacecraft ranging data precision by utilizing speed measurement data
  • Method for evaluating spacecraft ranging data precision by utilizing speed measurement data
  • Method for evaluating spacecraft ranging data precision by utilizing speed measurement data

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Embodiment Construction

[0029] In order to more clearly describe the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that are used in the embodiments. Apparently, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to these drawings without creative efforts.

[0030] When describing the embodiments of the present invention, the terms "vertical", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", " The orientation or positional relationship expressed by "horizontal", "top", "bottom", "inner", and "outer" is based on the orientation or positional relationship shown in the relevant drawings, which are only for the convenience of describing the present invention and simplifying the description, It is not intended to indicate or imply that the device or element referred to must have a p...

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Abstract

The invention relates to a method for evaluating spacecraft ranging data precision by utilizing speed measurement data. The method comprises the steps of S1 acquiring a ranging result and a speed measurement result of a ground station on a spacecraft; S2 obtaining a differential distance measurement result by subtracting the distance measurement results at the adjacent moments; S3 performing subtraction based on the differential distance measurement result and the speed measurement result to obtain a double-differential result; and S4 calculating the precision of the distance measurement result based on the double-difference result. The scheme is suitable for carrying out objective and accurate precision evaluation on the acquired spacecraft ranging data under the condition of having spacecraft high-precision speed measurement data, and is used for analyzing the ranging performance of the spacecraft and ground measurement and control equipment in tasks, and determining the weight of the ranging data for orbit determination and the like.

Description

technical field [0001] The invention relates to the field of spacecraft measurement and control, in particular to a method for evaluating the accuracy of spacecraft distance measurement data by using speed measurement data. Background technique [0002] In aerospace TT&C missions, ranging data from ground TT&C equipment to spacecraft is an important observation for spacecraft navigation. Accuracy evaluation of ranging data is the basic prerequisite for analyzing the ranging performance of spacecraft and ground measurement and control equipment, and determining the weight of ranging data for orbit determination. For the accuracy evaluation of ranging data, it can be estimated by using the theoretical calculation formula of ranging random error according to the measurement and control link level; A rough estimate is made (for orbit determination), and its accuracy is further evaluated based on the fitting residuals of ranging data after orbit determination. In principle, the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/40G01S13/08G01S13/50
CPCG01S7/40G01S13/08G01S13/50
Inventor 徐得珍李海涛樊敏
Owner NO 63921 UNIT OF PLA