Method for simulating three-dimensional land scene echoes of interferometric synthetic aperture radar (InSAR)

Abstract

The invention provides a method for simulating three-dimensional land scene echoes of an interferometric synthetic aperture radar (InSAR), comprising the following steps of: firstly, performing geometric modeling on three-dimensional land scenes and dividing the three-dimensional land scenes into facets which are adjacent to each other; then, performing electromagnetic modeling by using the facets as scatterers and calculating backscattering coefficients of the scatterers; and finally, generating echoes in parallel by calculating a single echo according to a signal model of an InSAR system. The invention has small amount of calculation and can finish calculation within a shorter time under the traditional calculation capability in a parallel calculation mode. Moreover, the invention has high calculation accuracy and can meet requirements of the InSAR for simulation and research.

Description

technical field [0001] The invention belongs to the intersecting technical field of microwave remote sensing and signal processing, and in particular relates to an echo simulation method of an interference synthetic aperture radar for a three-dimensional land scene. Background technique [0002] Interferometric synthetic aperture radar can obtain a three-dimensional topographic map of the earth's surface with high spatial resolution and elevation accuracy all-weather and all-time. Using three-dimensional topographic map information, it is possible to monitor changes in the earth's land surface and ice and snow surface, to predict disasters such as earthquakes, volcanic eruptions, landslides, and major floods, to provide assistance for agricultural, forestry, and fishery production, and to provide information support for military activities. In a word, the 3D topographic map obtained by interferometric synthetic aperture radar has important application value and wide applicat...

AI Technical Summary

Problems solved by technology

The above-mentioned methods have great limitations for a specific problem in the echo signal simulation: it is difficult to reflect the relative motion between the satellite, the earth, and the target, it is not easy to inject various system errors, and the accuracy of the simulation cannot reach the actual application requirements, cannot be universally applied

In 2004, Alessandro used the method of direct time domain superposition to simulate the echo of interferometric synthetic aperture radar. Compared with Franceschetti's method, this method has the problem of low computational efficiency

Domestic work in this area is similar to the above-mentioned methods, all of which are compromised between accuracy and efficiency, and it is difficult to achieve a better balance

Moreover, most of the above studies are aimed at a specific problem in echo simulation, and have failed to form a complete, practical, and applicable echo simulation method and process for system simulation.

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