Method for formation configuration of distributed satellites with synthetic aperture radars

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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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 constraints of multi-baseline interferometric SAR are used as design input parameters. By designing the control law of radar antenna viewing angle, distributed satellite The SAR system meets the design requirements of the optimal baseline combination constraints at any time during the orbital period, which provides a basis for the distributed satellite SAR system to obtain high-precision DEM products through the multi-baseline interferometric SAR processing method

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