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Proceedings Paper

Investigation on functional form in cross-calibration of spectral vegetation index
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Paper Abstract

Cross calibration of data products across generations of satellite program is indispensable to facilitate continuous data products by satellite observations. To investigate long term environmental change through vegetation monitoring, it is required to use data from different platforms, e.g., normalized difference vegetation index (NDVI) from NOAA-AVHRR series with the ones from TERRA- and AQUA-MODIS. In this context, cross calibration of spectral vegetation index (VI) is an important factor which determine the accuracy of such changes. In our previous work, we introduced a way of deriving analytical relationships between two vegetation indices based on an equation of vegetation isoline. The functional form of the relationships was found to be a ratio of polynomials. On the other hand, most of the studies that investigate relationships of NDVI products between two sensors simply assumed first- or second-order polynomial to describe the relationships of the two data products. In this paper, we discuss the relevancy of using higher-order polynomials by relating those coefficients implicitly to biophysical parameters, atmospheric properties, and soil optical properties. The order of polynomials sufficient to approximate the relationships is clarified from both analytical and numerical point of view by conducting numerical experiments in addition to analytical derivations.

Paper Details

Date Published: 27 September 2006
PDF: 9 pages
Proc. SPIE 6298, Remote Sensing and Modeling of Ecosystems for Sustainability III, 629813 (27 September 2006); doi: 10.1117/12.681564
Show Author Affiliations
Hiroki Yoshioka, Aichi Prefectural Univ. (Japan)
Tomoaki Miura, Univ. of Hawai'i at Manoa (United States)
Hirokazu Yamamoto, National Institute of Advanced Industrial Science and Technology (Japan)

Published in SPIE Proceedings Vol. 6298:
Remote Sensing and Modeling of Ecosystems for Sustainability III
Wei Gao; Susan L. Ustin, Editor(s)

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