Abstract
Abstract. Earth surfaces, such as deserts, salt lakes, and playas, have been widely used in the vicarious radiometric calibration of optical earth observation satellites. In 2009, the Infrared and Visible Optical Sensors (IVOS) sub-group of the Committee of Earth Observation Satellites (CEOS) Working Group on Calibration and Validation (WGCV) designated eight LANDNET reference sites to focus international efforts, facilitate traceability and enable the establishment of measurement "best practices." With support from the European Space Agency (ESA), one of the LANDNET sites, the Tuz Gölü salt lake located in central Turkey, was selected to host a cross-comparison of measurement instrumentation and methodologies conducted by 11 different ground teams across the globe. This paper provides an overview of the preliminary results of the cross-comparison of the ground-based spectral measurements made during the CEOS Land Comparison 13-27 August, 2010 with the simultaneous satellite image data acquisitions of the same site.
Highlights
Earth surfaces, such as deserts, salt lakes, and playas, have been widely used in the vicarious radiometric calibration of optical earth observation satellites
The ground measurements were used to predict the TOA reflectance values and compare them with the TOA reflectances derived from satellite data
The Committee of Earth Observation Satellites (CEOS) Land Comparison 2010 was conducted on 13-27 August, 2010 with the international participation of 11 different scientific ground measurement teams at the Tuz Gölü test site
Summary
Earth surfaces, such as deserts, salt lakes, and playas, have been widely used in the vicarious radiometric calibration of optical earth observation satellites. This paper compares the ground-based spectral measurements made during the CEOS Land Comparison 13-27 August, 2010 with simultaneous satellite image data acquisitions of ENVISAT MERIS, ALOS AVNIR-2, EO-1 ALI, LANDSAT 5 TM, LANDSAT 7 ETM, and THEOS over the same site, Tuz Gölü, Turkey (Özen, et al, 2011a) (Fig. 1).
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