The scientific results, present status, and future plan of the ADEOS-II mission, especially for AMSR and GLI sensor, are presented in the paper. Five specific sensors aboard the ADEOS-II satellite were designed for making overall observation of land, atmosphere, ocean, and cryosphere from the sun-synchronous polar orbit. The AMSR and GLI are two of the primary sensors aboard the ADEOS-II satellite. The AMSR, a microwave scanner, retrieved the physical parameters related to global water cycle such as total precipitable water, cloud liquid water, precipitations and soil moisture. One the other hand, the GLI, a near ultraviolet to infrared imager, had captured many environmental events such as volcano eruptions, forest fires, and dust events with moderate spatial resolution of 250 m or 1 km. It also observed ocean colors, sea surface temperature, vegetation indices, aerosol and cloud properties, and precipitable water over land area. The ADEOS-II science activities continue in future. The primary objective of the next phase is the data utilization toward the future satellite missions, and the synergy of satellite data and climate models.
ADEOS-2 is the Earth observing satellite which was successfully launched on December, 14, 2003. It is a follow-on mission to the ADEOS and the first mission of GCOM series which are planed to be operated for 20 years. The missions are (1) quantitative estimation of water and energy cycle relevant to the climatic change, (2) quantitative estimation of carbon cycle (biomass and net primary productivity) relevant to the global warming, and (3) detection of long term climatic change signal from data sets of ADEOS and ADEOS-II. Based on these missions scientific objectives are defined to be (1) quantitative estimation of water and energy cycle relevant to the climatic change,(2) quantitative estimation of carbon cycle (biomass and net primary productivity) relevant to the global warming, and (3) detection of long term climatic change signal from data sets of ADEOS and ADEOS-II. In order to achieve these goals, the ADEOS-2 Science program was established in NASDA. Standard and research products are defined there. Various validation projects are planned and will be implemented. The characteristics of the ADEOS-2 Science program can be summarized to be integrations in the following three fields, that is, (1) integration between different channels, (2) integration between different sensors and (3) integration between satellite remote sensing data and numerical models.
ADEOS-2 is a successor of the ADEOS, which was successfully launched at August 17, 1996 from Japan. Its main purpose is to contribute to the global change issues, such as global warming, ozone depletion and carbon cycle.It has 5 main sensors; global imager, advanced microwave scanning radiometer, sea winds, polarization and directionality of the Earth's reflectances, and improved Lim atmospheric spectrometer-II. In this mission, collaboration with exiting international research projects is heavily emphasized such as global energy and water cycle experiment, and climate variability and predictability of the world climate research program, International Geosphere-Biosphere Program, global ocean observing systems and global climate observing system. Its present status will be concisely summarized.