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Space-based radar clutter simulation method and device in consideration of terrain height

A space-based radar, terrain height technology, used in radio wave measurement systems, instruments, etc.

Inactive Publication Date: 2019-04-16
XIAN INSTITUE OF SPACE RADIO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, none of the above documents consider the elevation information of the terrain for clutter simulation.

Method used

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  • Space-based radar clutter simulation method and device in consideration of terrain height
  • Space-based radar clutter simulation method and device in consideration of terrain height
  • Space-based radar clutter simulation method and device in consideration of terrain height

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Embodiment

[0073] In the embodiment of the present invention, under the condition of obtaining the elevation information of the clutter area, the clutter distance R to be simulated is given, and the longitude and latitude of the clutter points whose distance from the radar is a given distance R at different heights are calculated respectively, and the clutter Compared with the actual elevation of the point, it is judged whether the distance from the clutter point to the radar is within the distance unit of distance R. After obtaining the latitude and longitude of all clutter points whose distance from the radar is R, the Doppler frequency of the clutter points on the clutter ring can be calculated; the coordinates of the clutter points in the antenna coordinate system are obtained by coordinate transformation, Thus, the antenna gain of the clutter point is calculated; finally, considering the influence of the radar equation, the calculation method of the clutter echo is obtained, such as ...

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Abstract

The invention discloses a space-based radar clutter simulation method and device in consideration of terrain height. Abnormal points are rejected through the space-based radar effect distance and earth elevation, and echo suitable for simulating the space-based radar equidistant clutter of any orbit is generated by adopting an iteration computation method. The method disclosed by the invention isin consideration of the influence of an earth sphere model and the earth autorotation, and can be used for the simulation of the space-based radar clutter, the simulation of the space-based radar two-dimensional clutter spectrum, and the evaluation of the space-based radar clutter inhibition method, and further can be used for the space-based radar orbit design.

Description

technical field [0001] The invention relates to a space-based radar clutter simulation method and device considering terrain height, and belongs to the technical field of radar simulation. Background technique [0002] In the research of space-based radar, clutter suppression is one of the most important key technologies, and the modeling and simulation of clutter is the basis of clutter characteristics analysis, and also the means of research and verification of clutter suppression methods. Due to the high orbital altitude of space-based radar, the earth can no longer follow the assumptions of the planar model, and the influence of the earth's rotation cannot be ignored, and additional Doppler frequencies will be introduced, and as the orbital altitude increases, this effect becomes more and more more obvious. Therefore, it is necessary to study the clutter simulation method suitable for space-based radar. [0003] In the signal processing of the radar system, the pulse c...

Claims

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Application Information

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IPC IPC(8): G01S7/40G01S7/41
CPCG01S7/4052G01S7/41
Inventor 段崇棣杨晓超王伟伟李渝朱江黎薇萍范一飞李奇
Owner XIAN INSTITUE OF SPACE RADIO TECH
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