ABSTRACT
Hyperspectral missions not only serve as a means of detailed and highly precise characterization of terrestrial vegetation but also can serve as a spaceborne reference for establishing multisensor continuity and compatibility among current, past, and future multispectral sensors. In this chapter, we discuss the potential uses of satellite hyperspectral remote sensing in multisensor continuity/compatibility studies of spectral vegetation indices (VIs) for global long-term monitoring. Some aspects of such uses are demonstrated for the normalized difference vegetation index, enhanced vegetation index (EVI), and two-band EVI (EVI2) using a regional Hyperion data set over the conterminous United States. They include spectral compatibility and spatial compatibility analyses, scaling uncertainty analysis, and the effects of atmospheric correction algorithm differences. Multiangular hyperspectral observation capability may be one of next important steps in the field of hyperspectral remote sensing.
