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A Subsurface Probing Radar Sub-satellite Point Pulse Precise Positioning Method

A radar detection and precise positioning technology, applied in the field of space-borne subsurface imaging radar, can solve the problems of inability to accurately control the position of the radar sub-satellite point, different electromagnetic wave propagation and refraction, and affect radar echo processing, so as to improve product safety and reliability, accelerate the development progress, and reduce the effect of verification cost

Active Publication Date: 2020-06-26
CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, when the existing synthetic aperture radar detects the space-borne subsurface, it needs to image different surface layers of the target star. The dielectric coefficient of different surface layers leads to different propagation and refraction of electromagnetic waves, so it is impossible to accurately control the position of the radar sub-satellite point , resulting in affecting the processing of radar echoes, resulting in poor imaging quality

Method used

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  • A Subsurface Probing Radar Sub-satellite Point Pulse Precise Positioning Method
  • A Subsurface Probing Radar Sub-satellite Point Pulse Precise Positioning Method
  • A Subsurface Probing Radar Sub-satellite Point Pulse Precise Positioning Method

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Embodiment 1

[0052] Such as figure 1 As shown, figure 1 It is a flow chart of the sub-surface detection radar sub-satellite point pulse positioning method of the present invention; the sub-surface detection radar sub-satellite point pulse precise positioning method is used to realize the accurate positioning of the satellite imaging radar on the surface of the star and the sub-surface imaging area. The sub-surface detection radar sub-satellite point pulse precise positioning method mainly includes the steps:

[0053] S1, the real-time acquisition module performs real-time acquisition and processing of satellite information input by the satellite platform;

[0054] S2. The on-orbit resolution processing module performs on-orbit resolution processing according to the satellite information to obtain the current on-orbit resolution;

[0055] S3, impulse scene processing is performed through impulse space-time unification module, coordinate transformation module, and impulse scene processing module....

Embodiment 2

[0061] In this embodiment, the sub-surface detection radar sub-satellite point pulse precise positioning method is to implement the real-time acquisition module, the on-track resolution processing module, and the coordinate transformation through an MCU (Microcontroller Unit) Specific functions of the module, the pulse space-time unification module, and the pulse scene processing module.

[0062] Such as figure 2 As shown, figure 2 It is an equipment flow chart of the sub-surface detection radar sub-satellite point pulse positioning method of the present invention; the sub-surface detection radar sub-satellite point pulse positioning method of the present invention mainly includes a communication module, a driving module, and an MCU processing unit.

[0063] The communication module adopts the 1553B communication module. The communication module mainly communicates with the star interface chip through the RT end interface chip, and receives the satellite information sent by the sa...

Embodiment 3

[0065] Such as image 3 As shown, image 3 It is a flowchart of step S1, and step S1 mainly includes:

[0066] S11, waiting for the RT end interface chip to be interrupted, judging whether it is a subaddress specified by the satellite information, and collecting data in the receiving buffer of the RT end interface chip;

[0067] S12: Perform a fault tolerance check on the satellite information, and save the correct satellite information in an internal variable table in a FIF0 manner;

[0068] S13. Fit the satellite information using the least square method to the received historical information of the first 20 satellite information, that is, orbit height information, pitch attitude angle, yaw attitude angle, and roll attitude angle , Pitch angular velocity, yaw angular velocity, roll angular velocity, X / Y / Z axis position information of the star coordinate system, X / Y / Z axis speed information of the star coordinate system for fitting, and obtain the current satellite information, the ...

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Abstract

The invention discloses a sub-surface detection radar sub-satellite point pulse precise positioning method. The method includes the following steps that: a real-time acquisition module performs real-time acquisition and processing on satellite information inputted by a satellite platform; an along-orbit resolution processing module performs along-orbit resolution processing on the satellite information so as to obtain current along-orbit resolution; and pulse scene processing is performed through a pulse space-time unification module, a coordinate transformation module, and a pulse scene processing module. With the sub-surface detection radar sub-satellite point pulse precise positioning method of the invention, the pulse scenes of a sub-surface detection radar can be accurately positioned; the size of an imaging scene can be accurately controlled; accurate results are provided for signal processing and windowing size control; the amount of data processing for the signal processing canbe reduced; development progress can be accelerated; verification costs can be reduced; subsequent changes can be reduced; and product safety and reliability are improved.

Description

Technical field [0001] The invention relates to the technical field of satellite-borne subsurface imaging radars, in particular to a sub-surface detection radar sub-satellite point pulse precise positioning method. Background technique [0002] Synthetic Aperture Radar (SAR) is a high-resolution microwave remote sensing imaging radar. It uses a smaller antenna and forms a virtual equivalent long antenna through the principle of synthetic aperture and pulse compression technology to obtain high target azimuth resolution. Radar image. Synthetic aperture radar has high resolution, can work around the clock, and can effectively identify camouflage and penetrate cover. [0003] However, when the existing synthetic aperture radar detects the satellite subsurface layer, it needs to image the different surface layers of the target star. The medium coefficient of the different surface layer causes the propagation and refraction of electromagnetic waves to be different, so it is impossible ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/90G01S13/88
CPCG01S13/887G01S13/90
Inventor 冯俊涛杜易吕鹏林洪娟
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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