Header

UZH-Logo

Maintenance Infos

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


Schaepman, Michael E; Zurita-Milla, Raúl; Kneubühler, Mathias; Clevers, Jan G P W; Delwart, Steven (2004). Assessment of long-term vicarious calibration efforts of MERIS on land product quality. In: Sensors, Systems, and Next-Generation Satellites VIII, Maspalomas, Gran Canaria, Spain, 13 September 2004 - 15 September 2004, 363-371.

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.

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.

Statistics

Citations

1 citation in Web of Science®
1 citation in Scopus®
Google Scholar™

Altmetrics

Downloads

23 downloads since deposited on 09 Jul 2014
8 downloads since 12 months
Detailed statistics

Additional indexing

Item Type:Conference or Workshop Item (Paper), refereed, original work
Communities & Collections:07 Faculty of Science > Institute of Geography
Dewey Decimal Classification:910 Geography & travel
Language:English
Event End Date:15 September 2004
Deposited On:09 Jul 2014 12:15
Last Modified:08 Dec 2017 06:24
Publisher:SPIE - International Society for Optical Engineering
Series Name:Proceedings of SPIE
ISSN:0277-786X
Publisher DOI:https://doi.org/10.1117/12.566582
Official URL:http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=851012

Download

Download PDF  'Assessment of long-term vicarious calibration efforts of MERIS on land product quality'.
Preview
Content: Published Version
Language: English
Filetype: PDF
Size: 2MB
View at publisher