Early Observation Results of the Advanced Microwave Scanning Radiometer 3 (AMSR3) Onboard the Global Observing SATellite for Greenhouse Gases and Water Cycle “IBUKI GW” (GOSAT-GW)

Japan Aerospace Exploration Agency - The Global Observing SATellite for Greenhouse gases and Water cycle “IBUKI GW” (GOSAT-GW)^*1 was successfully launched on June 29, 2025 (Japan Standard Time) and entered its nominal operational orbit on July 20. Antenna of the Advanced Microwave Scanning Radiometer 3 (AMSR3)^*2, which is one of mission payloads, was set to rotate at a speed of 40 revolutions per minute to ensure stable observations, and AMSR3 started collecting observation data^*3 as part of the satellite’s initial functional verification operations activity^*4 since August 11.