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Proceedings Paper

Assessment of long-term vicarious calibration efforts of MERIS on land product quality
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Paper Abstract

Since the launch of MERIS on ENVISAT long term activities using vicarious calibration approaches are set in place to monitor potential drifts in calibration in the radiance products of MERIS. We are using a stable, well monitored reference calibration site (Railroad Valley, Nevada, USA) to derive calibration uncertainties of MERIS over time. We are using interpolation of uncertainties to derive a second set of uncertainties for a national data validation in the Netherlands. A satellite image derived land use map of the Netherlands (LGN4) is used to determine the largest homogeneous land use classes using a standard purity index (SPI). Potential adjacency effects are minimized using moving window filters on the pixels of the aggregated map. Multiple error propagation is being used to assess the impact of calibration accuracy on land use classification. A classification in 9 land use classes is finally performed on MERIS FR images of the Netherlands using image based spectral unmixing and matched filtering with endmembers derived from the LGN. We conclude that the classification performance may significantly be increased, when taking into account long-term vicarious calibration results.

Paper Details

Date Published: 4 November 2004
PDF: 9 pages
Proc. SPIE 5570, Sensors, Systems, and Next-Generation Satellites VIII, (4 November 2004); doi: 10.1117/12.566582
Show Author Affiliations
Michael E. Schaepman, Wageningen Univ. (Netherlands)
Raul Zurita-Milla, Wageningen Univ. (Netherlands)
Mathias Kneubuehler, Univ. Zurich (Switzerland)
Jan Clevers, Wageningen Univ. (Netherlands)
Steven Delwart, European Space Agency/ESTEC (Netherlands)


Published in SPIE Proceedings Vol. 5570:
Sensors, Systems, and Next-Generation Satellites VIII
Roland Meynart; Steven P. Neeck; Haruhisa Shimoda, Editor(s)

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