Satellite-borne SAR wave position calculation and generation method and system for multi-parameter combination

Abstract

The invention provides a satellite-borne SAR wave position calculation and generation method and system for multi-parameter combination. The method comprises the steps of determining a PRF range, a pulse width range, a protection width range and an observation visual angle range; randomly combining the PRF, the pulse width and the protection width in the range; taking any combination number as a total cycle index, and extracting a PRF value, a pulse width value and a protection width value corresponding to any cycle by using a multi-core parallel computing mode; calculating front and back edge echo time of a transmitted signal interference band; calculating front and back edge echo time of a sub-satellite point signal interference band; calculating azimuth ambiguity under the corresponding parameters; calculating the range ambiguity under the corresponding parameters; calculating the system sensitivity under the corresponding parameters; when all the judgments are met, reserving the PRF value, the pulse width value and the protection width value, and reserving corresponding azimuth ambiguity, range ambiguity and system sensitivity calculation values; and repeatedly executing until all working conditions are completely calculated and judged.

Description

technical field [0001] The present invention relates to the technical field of overall design of synthetic aperture radar satellites, in particular, to a multi-parameter combination-oriented spaceborne SAR wave position calculation and generation method and system, and more specifically, to a multi-parameter combination-oriented high-efficiency satellite A method and system for calculating and generating SAR wave positions. Background technique [0002] Spaceborne Synthetic Aperture Radar (SAR) is an imaging radar for space-to-earth observation. Compared with optical remote sensing, it has the advantages of all-weather, all-time, and can penetrate certain vegetation, and can conduct global observation. It is used in military, There are broad applications in agriculture, marine and other fields. In the design process of a spaceborne SAR system, wave position design is a key step. First, based on system parameters and observation requirements (including antenna size, frequenc...

AI Technical Summary

Problems solved by technology

In the conventional wave position design method, the continuous adjustment of the overlap parameter is used as a means of wave position design iteration. Due to the irregularity of the pulse optional area, only the overlap degree is adjusted. First, the complexity of the algorithm design is high; second, the efficiency of the design low; third, it is difficult to obtain the optimal solution

The advantage of the conventional wave position design method is intuitive visualization, but the disadvantage is that the zebra pattern cannot be adjusted in real time due to the determination of the pulse width and guard width, and it requires multiple manual attempts to select the PRF to meet the imaging quality requirements, which is time-consuming and cannot be dynamically adjusted in real time. Adjust zebra plots for multiple wave level parameters available

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