Two dimentional attitude control system of synthetic aperture radar satellite

A technology of synthetic aperture radar and attitude control, which is applied in the direction of attitude control, aerospace vehicle guidance devices, etc. It can solve the problems of increasing the amount of algorithm calculation and the difficulty of imaging processing, the difficulty of improving the level of clutter suppression, and the increase of distance migration. , which is beneficial to the detection of slow-moving targets on the ground, improves the level of clutter suppression, and ensures the effect of absolute position accuracy
CN101513939BInactive Publication Date: 2011-01-05BEIHANG UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
BEIHANG UNIV
Publication Date
2011-01-05
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a two dimentional attitude control system of a synthetic aperture radar satellite, which includes a satellite position analysis module, a satellite position analysis module and an expected attitude determination module. The two dimentional attitude control system is applied in the situation that the synthetic aperture radar satellite runs on an elliptic orbit, and echoed signal doppler center frequency can be controlled to be zero by applying yaw-pitch-two-dimensional attitude control technology, thus effectively weakening the degree of coupling between distance vectorand direction vector and lowering the difficulty and operand of imaging process.
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Description

A 2D Attitude Control System for Synthetic Aperture Radar Satellite technical field The invention relates to a control system for radar satellite attitude. More specifically, it refers to a two-dimensional attitude control system for synthetic aperture radar satellites. Background technique The synthetic aperture radar satellite is installed on a moving platform, transmits and receives pulses according to a certain repetition frequency, and coherently superimposes the target echo signals received within a period of time, so as to obtain the detection effect of the large-aperture antenna array and achieve high azimuth resolution , while using pulse compression technology to achieve high range resolution. Compared with the real aperture radar satellite, the biggest feature of the synthetic aperture radar satellite is that it uses the relative motion between the radar and the target to generate the Doppler frequency shift effect, forms the azimuth spectrum, and improves the...

Claims

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