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Construction Method of On-orbit X-ray Pulsar Timing Model

A construction method, X-ray technology, applied in the field of on-orbit X-ray pulsar timing model construction, to improve calculation accuracy and solve the effect of oscillation phenomenon

Active Publication Date: 2019-06-21
XIDIAN UNIV
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Problems solved by technology

[0010] The existing radio timing model processing methods are relatively mature, but because the X-ray data form, platform dynamics, signal strength, etc. are quite different from radio observations, especially the existence of the above two problems, it is necessary to improve and design the X-ray timing model build method

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  • Construction Method of On-orbit X-ray Pulsar Timing Model
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  • Construction Method of On-orbit X-ray Pulsar Timing Model

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Embodiment Construction

[0040] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0041] Such as figure 1 As shown, the described on-orbit X-ray pulsar timing model building method comprises the following steps:

[0042] 1. X-ray pulsar photon arrival time preprocessing: When converting the intrinsic time of photon arrival time detected by a low-Earth orbit spacecraft to the coordinates in the barycentric coordinate system of the solar system, the X-ray photon arrival time measured at the spacecraft is assumed to be τ obs , then the photon arrival time at the corresponding SSB is

[0043] t SSB =τ obs +△ I +△ C +△ P +△ R +△ E +△S

[0044] In the formula, △ I It is the response delay of the instrument, which is used to correct the hardware response time delay of the X-ray detector;

[0045] △ C It is a clock correction, which corrects the time error introduced by the long-term stability reduction of the atomic clock recording...

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Abstract

The invention provides a method for building an in-orbit X-ray pulsar timing model. According to the method for building the in-orbit X-ray pulsar timing model, the problem of data introduced by weak X-ray signal intensity and strong observation platform dynamic condition is effectively solved by organically combining various calculation methods of X-ray pulsar photon arrival time preprocessing, high-precision pulsar autorotation frequency calculation, timing model initial value interval estimation, observation pulse profile reconstruction, high-precision pulse arrival time estimation and robust timing model estimation, ephemeris information such as high-precision pulsar position and time required by X-ray pulsar navigation can be provided, and accurate navigation is realized. The method is suitable for autonomous operation and control of orbiting satellites or constellation of the earth or other planets.

Description

technical field [0001] The invention relates to the field of celestial navigation, in particular to a method for constructing an on-orbit X-ray pulsar timing model. Background technique [0002] X-ray pulsar navigation is a new type of autonomous navigation, which can independently measure the position, speed and time of spacecraft on a single instrument, and can provide effective navigation and timing for near-earth, deep space and interplanetary spacecraft The solution is considered to be one of the most potential navigation and timing methods in the field of autonomous navigation in deep space in the future. [0003] Constructing the X-ray timing model is the basic work of the pulsar navigation system. For pulsar autonomous navigation, with the increase of transmission distance and interstellar occlusion and other reasons, it is impossible to rely on the ground measurement and control system to transmit radio timing model parameters in real time and continuously. When t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C21/02
CPCG01C21/02
Inventor 孙海峰方海燕孙雄包为民李小平刘彦明沈利荣苏剑宇李铁
Owner XIDIAN UNIV
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