Satellite-loaded SAR specified latitude area echo simulation method

Abstract

The invention discloses a satellite-loaded SAR specified latitude area echo simulation method, which comprises the following steps of: 1, performing spatial geometry relationship modeling on the satellite-loaded SAR; 2, acquiring satellite-loaded SAR echo simulation parameters through the given wave level parameter table; 3, acquiring a geocentric angle and a middle parameter K; 4, acquiring an angle gamma 1, an angle gamma 2, an ascending node argument u, a real argument of periapsis f, an eccentric angle E and an average argument of periapsis phi; 5, determining the initial time t1 of the echo simulation; 6, determining the finish time t2 of the echo simulation; and 7, performing the satellite-loaded SAR echo simulation according to the initial time t1 and the finish time t2 of the echo simulation. The satellite-loaded SAR specified latitude area echo simulation method has the advantages of high precision, strong practicality, low redundancy of the acquired simulation data, high intuition, and the like.

Description

technical field The invention relates to a method for emulating the echo of a space-borne SAR designated latitude area, belonging to the field of signal processing. Background technique The spaceborne synthetic aperture radar (Synthetic Aperture Radar, SAR) system has gone through decades of development and has made great achievements, and its results are widely used in military and civilian applications. And all spaceborne SAR systems are inseparable from echo simulation in the development process, such as signal processing algorithm research, performance index testing, hardware-in-the-loop simulation and other experiments require a large number of echo simulation data sources, so spaceborne SAR echo simulation plays an indispensable role in the development of spaceborne SAR system. Spaceborne SAR echo simulation has a strong purpose, especially in the use of echo simulation data to test the SAR system, the use of echo simulation data to test the imaging processing system...

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Problems solved by technology

However, because the mathematical solution of the inverse process is very difficult, the current common method is to expand the simulation time range to ensure that the latitude range of the observation area includes the specified latitude range, or to repeatedly adjust the start time and end time to meet the specified latitude range. observations, but no matter which method consumes a lot of computing resources

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