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This article presents some issues of correlative signal processing using field programmable gate arrays (FPGA). At first, the noise signal is briefly described. Second, an overview of some existing implementations is made. Preliminary results of own implementation are presented as a third.
This article presents the first results of river ice cover observation with Sentinel-1 data for the Vistula river (Poland). To our best knowledge this is the first study when Sentinel-1 data have been used to monitor ice cover changes during the whole season of ice phenomena. Frequent data acquisition allowed to detect changes every 3–5 days. We used an algorithm based on the log likelihood change...
Change detection is the process of identifying differences that have occurred in the terrain surface (EO) at different times (e.g. short time or long time changes, depending on the application). Change detection techniques vary depending on the data source — optical or radar (SAR) imagery. Since both sensors work with different geometry and frequency bands, different distortions and noises are present...
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