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Simulation analysis method and device for space debris laser ranging effect

A technology of space debris and laser ranging, applied in the direction of measuring devices, radio wave measuring systems, electromagnetic wave re-radiation, etc., can solve the problems of simulation results losing reference value and inconsistencies between simulation results and actual measurement results, so as to simplify operation and save energy The effect of time, high simulation efficiency

Active Publication Date: 2018-11-30
北京跟踪与通信技术研究所
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Problems solved by technology

If the space debris laser ranging method adopts the traditional simulation analysis method based on the calculation of the detection probability based on the divided interval, it will be too dependent on the length of the interval division, and there will be a false periodic phenomenon in which the simulation results are inconsistent with the measured results, making the simulation results lose their reference value

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  • Simulation analysis method and device for space debris laser ranging effect
  • Simulation analysis method and device for space debris laser ranging effect
  • Simulation analysis method and device for space debris laser ranging effect

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Embodiment Construction

[0037] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0038] The present invention provides a method for simulation and analysis of space debris laser ranging effects. The preliminary analysis and actual use process of the method are as follows:

[0039] Step 1. Substitute parameters such as space debris material reflectivity, distance, and atmospheric transmittance into the space debris echo photon number equation to obtain the echo photon number and estimate the echo photon distribution; according to the skylight background brightness, detector dark noise and other parameters Estimate the amount and distribution of noise.

[0040] Among them, it is considered that the echo distribution obeys the Gaussian distribution, and the noise distribution obeys the uniform distribution. Non-cooperative targets such as space debris only rely on their surface diffuse reflection characteristics to reflect laser light, a...

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Abstract

The invention discloses a simulation analysis method and device for the space debris laser ranging effect. The simulation analysis method comprises the steps that aiming at the photon moment sequence,according to the sequential order of the photons, whether the photons are detected or not is judged, specifically, according to the detection mode, a random number delta is generated within the uniform distribution range of 0-1, the magnitude relation between the random number delta and the detection efficiency eta of the single photon is judged, wherein eta is equal to 1-e<-1>, if delta is smaller than or equal to eta, the photon is successfully detected, if delta is larger than eta, the photon is not detected, and then the next photon continues to be judged till all the photons are judged;and based on the photon detection result, a simulated detector output signal is generated. By using the simulation analysis method and device, simulation analysis on the space debris laser ranging effect can be completed without interval division of the photons, and the consistency between the simulation effect and the actual measurement effect is improved.

Description

technical field [0001] The invention relates to detection effect analysis and simulation technology in laser ranging, in particular to a method and device for simulating and analyzing the laser ranging effect of space debris with low number of echoes and large echo spread. Background technique [0002] Laser ranging technology is a high-precision distance measurement method. The target distance is obtained by measuring the flight time of laser pulses between the target and the detector. The accuracy is one to two orders of magnitude better than that of radar. It is widely used in the field of space target measurement. The simulation analysis of the laser ranging effect is of great significance for obtaining the prior ranging results and evaluating the measured results. First, the simulation map of the scattered point distribution of the echo can be obtained, which is convenient for intuitive analysis, and the method of subsequent echo identification and processing can be sel...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/497G01S17/08
CPCG01S7/497G01S17/08
Inventor 薛莉孙斌黄晨黄璐王鲲鹏吴文堂王东亚
Owner 北京跟踪与通信技术研究所
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