Satellite-borne SAR target location precision index ground assessment method

A technology for target positioning and positioning accuracy, applied in radio wave measurement systems, instruments, etc., to achieve the effect of clear process, improved accuracy, and easy implementation
CN107300692AActive Publication Date: 2017-10-27SHANGHAI SATELLITE ENG INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI SATELLITE ENG INST
Publication Date
2017-10-27

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Abstract

The invention discloses a satellite-borne SAR target location precision index ground assessment method, and the method comprises the following steps: 1, sorting error factors which affect the target location precision; 2, carrying out the analysis of the impact on modeling from error factors; 3, carrying out the distribution and budgeting of location precision indexes; 4, carrying out the Monte Carlo simulation test of the location precision based on orbit simulation data; 5, carrying out the statistics of a simulation result, and estimating the location precision indexes. The invention firstly proposes the brand-new satellite-borne SAR target location precision ground assessment method and flow, and is innovative. In particular, the invention proposes a Monte Carlo simulation method for verifying the target location precision, and the Monte Carlo simulation method improves the accuracy of location precision estimation. The method provided by the invention is clear in flow, is easy to implement, and achieve a guide effect for a general designer for a satellite-borne SAR system.
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Description

technical field

[0001] The invention relates to a ground evaluation method for a target positioning accuracy index, in particular to a ground evaluation method for a spaceborne SAR target positioning accuracy index. Background technique

[0002] In 1951, Wiley discovered for the first time that side-looking radar can improve the azimuth resolution by using the Doppler frequency shift in the echo data signal. This milestone discovery marked the birth of Synthetic Aperture Radar (SAR) technology . Spaceborne synthetic aperture radar is an all-weather and all-weather active earth observation system, which has played an important role in land and resources census, surveying and mapping, disaster prevention and mitigation, etc.

[0003] The application of SAR images needs to know the exact spatial position information of SAR images, but due to the position of the remote sensing imaging system, the error of the clock, as well as the influence of factors such as the space environm...

Claims

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