Evolution of NASA’s Earth Observing System and Development of the Moderate-Resolution Imaging Spectroradiometer and the Advanced Spaceborne Thermal Emission and Reflection Radiometer Instruments

This chapter provides insight into the development and implementation of two key instruments for NASA’s Earth Observing System (EOS): the Moderate Resolution Imaging Spectroradiometer (MODIS) and the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER). A summary of the basis and evolution of the EOS sets the background and historical context for the development of these two instruments. MODIS and ASTER continue to provide data that improve understanding of the Earth-atmosphere processes and trends in various associated parameters. Additionally, they improve capabilities to monitor the Earth’s natural resources.