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Simultaneous Analysis of Radar Look Angel and Placement of Features to Identification of Terrain Feature (Mianrahan Basin in West of Iran

Mohammad Maleki, Seyed Mohammad Tavakkolisabour, Babak Arjmand, Mahdis Rahmati

Abstract


In this study, the effect of look angle and placement of feature than radar sensor to detection of the effects of geomorphological features was conducted simultaneously. In this study, the C-band of satellite images Sentinel -1 was used. The images were captured in two different look angles and two different look directions. Four features such as valley, blade, alluvial fans and debris was extracted by visual interpretation of the images, and for ground reference data World Imagery images and field studies were used. Each of images was divided into three categories in terms of look angle. Also the features according to placement into sensor were divided to three categories, tangent, near tangent and perpendicular to sensor. Then, for each of these categories in different look angels the parameters accuracy, precision and quality were calculated. The results showed that although the placement of feature than sensor look and reflection of radar signals from surface of feature can be effective to identification of boundary and feature detection, but only rely to placement of feature is not enough, because in the near Nadir point there is the greatest Layover and increase in farther from the point of foreshortening.

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