Synthetic Aperture Radar (SAR) is a technology used for producing satellite images with high resolution. Since few decades SAR imagery has been the most famous and prominent thing in the context of earth’s observation because of its capability of penetrating through the soils and clouds. Also, SAR imagery has a good ability to operate at any condition type of weather during days and nights. In Remote Sensing technology it is playing a vital role because of this capability and ability. But the presence of undesirable data influences the actual details of the SAR image. This undesirable data is called as noise. This specific noise is also called as “Speckle”. The SAR images are corrupted by the presence of this strong noise. Over few years many techniques have been used to remove the noise from SAR imagery. This process of removing the speckles or noise from SAR imagery is called as Despeckling. In this paper, different methods which are used for removing the noise are discussed.

Synthetic Aperture Radar, Speckle, Despeckling

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