High-Accuracy Doppler Signal Processing: Techniques and Applications

In this paper, Doppler signal processing having a large potential for further developing and gaining new applications have been demonstrated. This has been illustrated by several examples related with the estimation of the SAR platform orientation angles from the radar returns, improving quality of SAR images based on a high-accuracy estimation of the Doppler rate, and retrieving 3D topography of Earth surfaces by using conventional squint-mode SAR systems, where sub-Hertz accuracy of the Doppler centroid measurements is realized. Among other promising applications of high-accuracy Doppler measurements, InSAR systems can be mentioned, including those intended for high-resolution imaging the Moon and other space objects with Earth-and space based radars.