Introduction to Synthetic Aperture Radar: Concepts and Practice by E. David Jansing

Author:E. David Jansing
Language: eng
Format: epub
Publisher: McGraw Hill
Published: 2021-04-15T00:00:00+00:00

FIGURE 6.15 A cartoon illustration of the tomographic model for SAR.

As was described previously, CAT uses the intensity of the measured radition as the projection directly. In SAR, since we are using a chirp waveform and dechirping the data, the measured energy is the transform of the projection. It is not difficult to switch back and forth between the projection and its transform. Additionally, CAT typically images the entire 360° field. SAR typically does not, making SAR a narrowband version of this tomographic method. Despite its narrowband nature, it does not take a good deal of θ angles to create a high-resolution, high-quality image. Recall that azimuth resolution is defined by ρa = λ/2Δθ.

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