Vicarious calibration of Aqua and Terra MODIS

Kurtis J. Thome; Jeffrey S. Czapla-Myers; Stuart F. Biggar

doi:10.1117/12.506364

10 November 2003 Vicarious calibration of Aqua and Terra MODIS

Kurtis J. Thome, Jeffrey S. Czapla-Myers, Stuart F. Biggar

Proceedings Volume 5151, Earth Observing Systems VIII; (2003) https://doi.org/10.1117/12.506364
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

The Moderate Resolution Imaging Spectroradiometer (MODIS) is onboard both the Terra and Aqua platforms. An important aspect of the use of MODIS, and other Earth Science Enterprise sensors, has been the characterization and calibration of the sensors and validation of their data products. The Remote Sensing Group at the University of Arizona has been active in this area through the use of ground- based test sites. This paper presents the results from the reflectance-base approach using the Railroad Valley Playa test site in Nevada for both Aqua and Terra MODIS. The key to the approach is the measurement of surface reflectance over a 1-km² area of the playa and results from this method shows agreement with both MODIS sensors to better than 5%. Early results indicate that while the two sensors both agree with the ground-based measurements to within the uncertainties of the reflectance-based approach, there were significant differences between the Aqua and Terra MODIS for data prior to September 2002. Recent results indicate that this bias, if any, is now within the uncertainties of the reflectance-based method of calibration.

Citation Download Citation

Kurtis J. Thome, Jeffrey S. Czapla-Myers, and Stuart F. Biggar "Vicarious calibration of Aqua and Terra MODIS", Proc. SPIE 5151, Earth Observing Systems VIII, (10 November 2003); https://doi.org/10.1117/12.506364

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