CDGPS Relative Position Determination of Distributed SAR Satellite Formation Based on Dynamic Orbit Model

Influence of ionospheric path delay on distributed SAR satellite formation relative position determination

Distributed Spaceborne SAR-GMTI System Simulation;

The earth rotation has two main effects on the distributed spaceborne SAR-GMTI.

Distributed spaceborne SAR system is a new concept of spaceborne radar system, it can implement high resolution and large swath imaging, MTI(Moving Target Indication) and interferometry, it also has higher performance and more flexibility than single spaceborne SAR and multi spaceborne radar simply netted, so this distributed system is one of the most important directions for the future.

High precision inter-satellite baseline measurement is one of the most important issues for distributed small satellite SAR(DSS-SAR).

Distributed small satellite synthetic aperture radar (DSS-SAR) is a new way to observe the earth s surface from space,which is proposed in the last years of the 20th century.

Based on an overview of the distributed spaceborne SAR/ATI,this paper describes the principle of SAR/ATI and the impact of clutter and noise to the SAR/ATI performance,and proposes a new SAR/ATI method based on a priori information.

In this paper, the relation ship between the azimuth resolution and the azimuth echo spectrum is carefully analyzed,and an algorithm for improving azimuth resolution of the distributed space-borne SAR system by the azimuth echo spectrum joint processing is proposed.