15:30 〜 15:45
[ACG41-25] Overview of the Advanced Microwave Scanning Radiometer (AMSR) series instruments and preparation for the upcoming AMSR3 for global water cycle observations
キーワード：衛星、マイクロ波放射計、水循環、全球
JAXA's Advanced Microwave Scanning Radiometer (AMSR) series is a multi-frequency, total-power microwave radiometer system with dual polarization channels for all frequency bands from 6.9 to 89 GHz (Imaoka et al, 2010) and has been flying since 2002 to observe water-related variables globally and frequently from space on a near-real-time basis. Because of its uniqueness in large-sized antenna and low-to-high frequency channels, the AMSR series instruments play an important and essential role in monitoring global water cycle variation and climate changes as well as in operational applications, such as numerical weather prediction, typhoon analysis, fishery, and polar navigation.
There are two major mission targets defined for the AMSR series; 1) monitoring and projection of water cycle variation; and 2) promoting utilization in operational applications. To achieve these targets, standard products of the AMSR series are defined to cover water-related parameters including the Essential Climate Variables (ECVs) in the atmosphere, ocean, land and cryosphere (see https://www.eorc.jaxa.jp/AMSR/datacatalog/). In addition, several research products, which are more challenging but important, have been developed and released upon requests from users and stakeholders.
Currently operating AMSR2 onboard the Global Change Observation Mission – Water (GCOM-W) satellite has been in operation on the A-train orbit more than 12 years in healthy conditions and expected to overlap with and be succeeded by its follow-on mission, AMSR3, which will be carried by the Global Observing SATellite for Greenhouse gases and Water cycle (GOSAT-GW). AMSR3 and GOSAT-GW are currently in a final development phase toward the launch, which is scheduled in the first half of JFY2025 from the Tanegashima Space Center by the H-IIA rocket.
AMSR3 is designed to succeed and expand global water cycle observations and operational applications by the past AMSR series. Its sensor specification is almost similar to that of AMSR2 except additional channels in high-frequency (166.5, 183+-7, 183+-3 GHz) for snowfall and water vapor analysis and 10.25 GHz with improved Noise Equivalent Delta Temperature (NEDT) for robust SST retrievals in higher spatial resolution. Manufacturing of AMSR3 and flight tests were completed, and AMSR3 was installed on the GOSAT-GW system to test for the launch. Development of AMSR3 ground systems, including satellite control, mission operation, data processing and research systems, were completed and now ready for the launch. Initial calibration and validation phase will start after the initial checkout, which is planned for a 3-month period after the launch, of satellite and sensor systems. We plan to distribute early L1 products to partner agencies before the completion of initial calibration and validation phase to help implementation of AMSR3 data in their operational application. We will also provide early L1 product to selected Principal Investigators (PIs) for algorithm development for tuning their algorithms using actual AMSR3 observation data for planned public release scheduled 1-year after the launch. For validation of the AMSR series, we have maintained and updated two validation sites for soil moisture observation in Mongolia and Australia under collaboration with partner universities and examined potential new validation site for snow depth observation.
Further information regarding the AMSR series can be obtained from the integrated web site for the AMSR series (https://www.eorc.jaxa.jp/AMSR/). We recently added new function to the AMSR Earth Environment Viewer, an interactive web browsing tool for the AMSR series, enabling to display polar regions either in Northern and Southern Hemisphere in order to be beneficial to users in polar research (https://www.eorc.jaxa.jp/AMSR/viewer).
There are two major mission targets defined for the AMSR series; 1) monitoring and projection of water cycle variation; and 2) promoting utilization in operational applications. To achieve these targets, standard products of the AMSR series are defined to cover water-related parameters including the Essential Climate Variables (ECVs) in the atmosphere, ocean, land and cryosphere (see https://www.eorc.jaxa.jp/AMSR/datacatalog/). In addition, several research products, which are more challenging but important, have been developed and released upon requests from users and stakeholders.
Currently operating AMSR2 onboard the Global Change Observation Mission – Water (GCOM-W) satellite has been in operation on the A-train orbit more than 12 years in healthy conditions and expected to overlap with and be succeeded by its follow-on mission, AMSR3, which will be carried by the Global Observing SATellite for Greenhouse gases and Water cycle (GOSAT-GW). AMSR3 and GOSAT-GW are currently in a final development phase toward the launch, which is scheduled in the first half of JFY2025 from the Tanegashima Space Center by the H-IIA rocket.
AMSR3 is designed to succeed and expand global water cycle observations and operational applications by the past AMSR series. Its sensor specification is almost similar to that of AMSR2 except additional channels in high-frequency (166.5, 183+-7, 183+-3 GHz) for snowfall and water vapor analysis and 10.25 GHz with improved Noise Equivalent Delta Temperature (NEDT) for robust SST retrievals in higher spatial resolution. Manufacturing of AMSR3 and flight tests were completed, and AMSR3 was installed on the GOSAT-GW system to test for the launch. Development of AMSR3 ground systems, including satellite control, mission operation, data processing and research systems, were completed and now ready for the launch. Initial calibration and validation phase will start after the initial checkout, which is planned for a 3-month period after the launch, of satellite and sensor systems. We plan to distribute early L1 products to partner agencies before the completion of initial calibration and validation phase to help implementation of AMSR3 data in their operational application. We will also provide early L1 product to selected Principal Investigators (PIs) for algorithm development for tuning their algorithms using actual AMSR3 observation data for planned public release scheduled 1-year after the launch. For validation of the AMSR series, we have maintained and updated two validation sites for soil moisture observation in Mongolia and Australia under collaboration with partner universities and examined potential new validation site for snow depth observation.
Further information regarding the AMSR series can be obtained from the integrated web site for the AMSR series (https://www.eorc.jaxa.jp/AMSR/). We recently added new function to the AMSR Earth Environment Viewer, an interactive web browsing tool for the AMSR series, enabling to display polar regions either in Northern and Southern Hemisphere in order to be beneficial to users in polar research (https://www.eorc.jaxa.jp/AMSR/viewer).