Constellation orientated simulating system and method based on X-ray pulsar

Abstract

The invention discloses a constellation orientated simulating system and method based on an X-ray pulsar. The constellation orientated simulating method is characterized by comprising the steps of measuring a relative distance between stars by using an equation of light spread by an inter-star link or X-ray pulsar signal between satellites, obtaining an included angle between satellite base lines in a constellation, meanwhile, extracting a pulsar radiation direction vector by a satellite borne X-ray detector and a collimator which are matched, calculating an included angle between the vector and the satellite base lines, further calculating an included angle between the vector and the plane of the constellation, measuring integral rotation and drift of earth orbiting satellites or constellation and correcting. The constellation orientated simulating system based on the X-ray pulsar comprises a signal simulating unit, a time maintaining unit, a modulation unit, a controllable light time delay unit, an optical sending unit, an optical receiving unit, a photon detecting unit and an oriented simulating unit. The constellation orientated simulating system is capable of performing analogue simulation on realization of signal generation, transmission, acquisition, processing and oriented algorithm in the process of orienting the X-ray pulsar.

Description

technical field [0001] The invention belongs to the field of navigation technology, and in particular relates to a constellation orientation simulation system and method based on X-ray pulsars. The method is used to provide orientation services for orbit constellations or formation satellites of the earth or other near-celestial bodies. The simulation simulation system is the The method provides a platform for ground simulation and demonstration verification. Background technique [0002] X-ray pulsar navigation can provide high-precision position, velocity, attitude and timing services for spacecraft from low-earth orbit, deep space to interstellar space, and has gradually become a hot field of international and domestic research in recent years. In 1981, Chester and Bateman of the Institute of Communications Systems of the United States proposed the idea of ​​using pulsar X-ray sources for spacecraft navigation; in 1999, the US Air Force's "Advanced Research and Global Obs...

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Problems solved by technology

[0004] But this method also has many shortcomings: (1) X-ray pulsar signal is extremely weak, in order to capture enough photon signals, the detector area must be increased, thus increasing the cost and total load; (2) Navigation accuracy is affected by many factors Limitations, such as relativity correction accuracy, pulsar timing model accuracy, phase measurement accuracy, etc., lead to poor accuracy; (3) Due to cost and accuracy limitations, this navigation method has no obvious application advantages in orbital satellite navigation

These deficiencies have limited the on-orbit application of X-ray pulsar navigation. On the other hand, many inherent properties of X-ray pulsars have not been fully utilized, such as accurate radiation direction vectors, which can also be used as information sources in pulsar navigation systems.

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