Method for formation configuration of distributed satellites with synthetic aperture radars

A technology of formation configuration and satellite formation, which is applied in the field of signal processing and can solve the problem that multiple baselines are difficult to achieve optimal baseline combination.

Inactive Publication Date: 2009-09-02
BEIHANG UNIV
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Problems solved by technology

[0007] 1. Purpose: The purpose of the present invention is to provide a distributed satellite synthetic aperture radar formation configuration method, which overcomes the deficiencies in the prior art, and satisfactorily solves the difficulty in realizing the multi-baseline formed by existing distributed satellites. For the problem of optimal baseline combination, a "concentric ring" formation configuration is proposed, and the optimal baseline combination con

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  • Method for formation configuration of distributed satellites with synthetic aperture radars
  • Method for formation configuration of distributed satellites with synthetic aperture radars
  • Method for formation configuration of distributed satellites with synthetic aperture radars

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[0107] The following will take the formation configuration design of a virtual reference satellite and five other distributed satellites as an example to illustrate the implementation steps of the "concentric ring" configuration design method proposed in this paper. A kind of design method of distributed satellite SAR formation configuration of the present invention, its specific operation steps are as follows:

[0108] Step 1: Distributed satellite formation configuration design and orbit equation determination

[0109] (a) Define the relative coordinate system of distributed satellites

[0110] The relative coordinate system takes the virtual reference satellite as the coordinate origin, the x-axis points to the flight direction of the reference satellite, the y-axis points to the radial direction of the reference satellite, and the z-axis is perpendicular to the orbital plane of the reference satellite, forming a right-handed rectangular coordinate system.

[0111] (b) Cal...

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Abstract

The invention relates to a design method for the formation configuration of distributed satellites with synthetic aperture radars (SAR). The method comprises the following five operation steps: step 1: designing the formation configuration of the distributed satellites and conforming fly-by path equations; step 2: confirming an optimal base line length range of the distributed satellites in start time; step 3: confirming an optimal base line sequence of the distributed satellites in start time; step 4: confirming track parameters of the formed satellites forming a concentric circle configuration; and step 5: calculating effective base lines and vertical path base lines in a track period. The invention provides the concentric circle formation configuration, uses the optimal base line combined constraint conditions of multi-base line interference SARs as design input parameters and designs a control law of radar antenna visual angles to realize that a distributed satellite SAR system can satisfy the design requirements of the optimal base line combined constraint conditions in any time in a track operation period and a basis is provided for the distributed satellite SAR system to obtain high-precision DEM products by a multi-base line interference SAR treatment method.

Description

(1) Technical field [0001] The invention relates to a distributed satellite formation configuration method, in particular to a distributed satellite synthetic aperture radar (SAR) formation configuration method suitable for multi-baseline interferometric altimetry. It belongs to the technical field of signal processing. (2) Background technology [0002] Synthetic Aperture Radar (SAR) satellite is a space-to-Earth observation system that has developed very rapidly in recent years. Because SAR satellites have all-weather and all-weather earth observation capabilities and have certain penetrating power, they are widely used in military reconnaissance, land surveying and mapping, resource detection, ocean observation and other fields. Interferometric Synthetic Aperture Radar (InSAR) is a combination of interferometric technology and SAR processing technology, using two SAR complex images to extract interference information through interference processing, and then further sign...

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Application Information

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IPC IPC(8): G01S13/90
Inventor 陈杰李琳杨威李卓李春升周荫清
Owner BEIHANG UNIV
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