SAR systems operate by emitting microwave radiation towards the Earth's surface and measuring the backscattered signals. The unique characteristic of SAR is its ability to collect data day and night, regardless of weather conditions, making it an essential tool for Earth observation. SAR applications are diverse and include land use/land cover classification, crop monitoring, soil moisture estimation, oceanography, and disaster management.
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The RDA is the most classic and widely implemented SAR processing algorithm. It processes data by applying a Fourier Transform in the range direction, executing RCMC and azimuth focusing in the Range-Doppler domain, and finishing with an inverse Fourier Transform. SAR systems operate by emitting microwave radiation towards
). Like range compression, this is done via 1D FFTs along the azimuth columns, multiplying by the azimuth matched filter, and calculating the IFFT. This step yields the final, single-look complex (SLC) image containing focused phase and amplitude values. 4. Key SAR Focusing Algorithms This article is for educational purposes
Degrades at very high squint angles or ultra-wide apertures. 2D Frequency Domain