Method and device for obtaining distance between space target and observation station

Abstract

The embodiment of the invention provides a method and a device of obtaining the distance between a space target and an observation station. The method comprises the steps of firstly obtaining historical data comprising the corresponding relation of time and space target optical position information and the distance information between the space target and the observation station; speculating data of future moment by the historical data, namely, a space region where a next moment space target possibly appears; when the next moment arrives, obtaining an optical position deviation value between the predicted position information of the space target, which is speculated, and the actual position information of the space target; speculating a distance modification value of the distance information between the current moment space target and the observation station according to the optical position deviation values of the space target at different moments, thus performing amendment on the distance between the space target and the observation station, which is forecast and provided in advance, accurately calculating the time of starting a single photon detector, and detecting weak echo by the single photon detector.

Description

Technical field [0001] The invention relates to the field of astrometry, and more specifically, to a method and device for obtaining the distance between a space target and an observation station. Background technique [0002] In the next generation of space monitoring technology, Satellite Laser Ranging (SLR) is a technology for measuring the distance between the single-photon detector of the observation station and the space target. The laser ranging of the space target refers to the laser emission from the observation station. The device emits laser pulses, and the weak echo (one or more photons) reflected by the reflecting surface of the space target is detected by the single-photon detector of the observation station. By accurately measuring the round-trip time of the laser pulse, the single-photon detector and the observation station can be calculated. The distance to the space target. [0003] Single-photon detectors can detect weak echoes after being turned on, while the w...

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Problems solved by technology

[0005] In view of this, the present invention provides a method and device for obtaining the distance between the space object and the observation station, to overcome the problem in the prior art that the distance between the single photon detector of the observation station and the reflective surface of the space object is not corrected. method, which may lead to a wrong calculation of the time when the single photon detector is turned on, and the problem that the single photon detector cannot detect weak echoes

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