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Two years of operational use of Subpixel Automatic Navigation of AVHRR scheme: Accuracy assessment and validation



Two years of operational use of Subpixel Automatic Navigation of AVHRR scheme: Accuracy assessment and validation



Remote Sensing of Environment 85(2): 190-203



Automated techniques for satellite imagery navigation and co-location are especially required for environmental monitoring activities intensively using satellite data. In this work are presented the results obtained after 2 years of operational use of the Subpixel Automatic Navigation of AVHRR (SANA) scheme. An automatic method for accuracy assessment of satellite navigation techniques, which permits a preliminary evaluation of their performances, dealing with a large collection of test images is also proposed. The navigation accuracy assessment, performed by using a selection of small islands as reference points, is discussed. Results achieved over more than 400 Advanced Very-High-Resolution Radiometer (AVHRR) scenes confirm that the SANA scheme is a very accurate one (computed mean navigation error is generally about one AVHRR pixel). Furthermore, because of its high processing speed, it can be considered a suitable tool for intensive satellite data processing in multitemporal analyses, especially required for environmental studies as well as for operational monitoring purposes.

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Accession: 011604438

Download citation: RISBibTeXText

DOI: 10.1016/s0034-4257(02)00205-5



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