Abstract
Remotely sensed images observed by synthetic aperture radar (SAR) become to be more significant for a variety of purposes. It is necessary to process and focus SAR images at a user's side for required precision. This paper presents a concept, a system structure, and an implementation method for a web application system with a SAR image processing for education. The system employs Ajax technology in consideration of current computer and network systems. This system has three software components, a SAR server, an HTTP server, and a web browser in each terminal computer. The SAR server is the main component for managing the SAR database and processing all SAR data sets. The range-Doppler method is adopted as a focusing algorithm. Three displaying measures are newly introduced since the SAR images are sets of mass complex number pixels. Operation of SAR image, sample processed images are shown to exhibit actual examples of processing ALOS PALSAR (Advanced Land Observing Satellite Phased Array type L-band SAR) data. From step-by-step processing results, the proposed web application system was demonstrated to provide a useful graphical user interface (GUI) and to produce the SAR image with adjusted parameters by using dialogs.
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