Dear Colleagues, We are pleased to announce the 7th International Conference on GPS Radio Occultation (ICGPSRO) 2025. The conference will be held on 28-30 October 2025 at the National Cheng Kung University, Tainan, Taiwan. This is the first time we will host the conference in Tainan <https://www.taiwanobsessed.com/tainan-taiwan-guide>, the first capital of Taiwan, only 1.5 hours from Taipei by high speed rail. The conference will address the scientific progresses of radio occultation missions and advanced GNSS technologies for the exploration of meteorology, climate, and space science. Tentative solicited topics are as follows. 1. Missions and programs (new missions and operations) 2. Retrieval methodology and science 3. Numerical weather prediction data assimilation advances and validation studies 4. Atmospheric physics and climate 5. Space weather 6. GNSS-Reflectometry 7. Innovative GNSS technologies A meeting website will soon be opened for registrations and abstract submissions. We will keep you updated. Looking forward to seeing you in Tainan, Taiwan. Charles Lin and Jan-Peter Weiss on behalf of the organizing committee. 1. Vick Chu (Executive Vice Director of TASA) 2. Jan-Peter Weiss (UCAR COSMIC) 3. Cheng-Yun Huang (FORMOSAT-7/COSMIC-2 Program Director, TASA) 4. Wen-Hao Yeh (TRITON Mission Program Director, TASA) 5. Shu-Chih Yang (Department of Atmosphere Science, NCU) 6. Su-Ya Chen (GPS-ARC, NCU) 7. Nick Pedatella (NCAR HAO) 8. Charles Lin (Department of Earth Sciences, NCKU)