Error Analysis of Platform Positioning Based on SAR Image Matching

As an important technology in the field of precise guidance, platform positioning technology based on SAR image matching has many advantages such as all-weather, all-time capabilities and no time cumulative error. However, the existence of various interference factors causes positioning errors. This paper concentrates on the analysis of platform positioning error based on SAR image matching, which provides significant engineering reference for platform positioning error correction. On the basis of the principle of SAR platform positioning technology, the factors influencing the platform positioning errors are sorted out. Then, the positioning error law of direct interference factors is derived, based which the platform positioning error correction method comes up innovatively. Further, the simulations for direct interference factors are carried out, which verify that the results are consistent with the theoretical assumptions and the positioning error can be corrected accurately by the correction method.