Shih-Ping Chen陳世平1,2, Charles C.-H. Lin林建宏1,2,
P. K. Rajesh查傑希1, Tiger Jann-Yenq Liu劉正彥3,4
1Department of Earth Sciences, National Cheng-Kung University (NCKU), Taiwan
2Han-Min Hsia Space Science and Technology Center, NCKU, Taiwan
3Center for Astronautical Physics and Engineering, National Central University, Taiwan4Department of Space Science & Engineering, National Central University, Taiwan
*E-mail: chensp555@gmail.com
Observations utilizing Global Navigation Satellite System (GNSS) signals enable monitoring of both the ionosphere and surface conditions on Earth. This presentation introduces two satellite missions of Taiwan: FORMOSAT-7/COSMIC-2 (F7C2) and TRITON. F7C2, a six-satellite constellation employing limb-viewing radio occultation (RO), provides near real-time monitoring of the ionosphere at mid- and low-latitudes. However, these RO observations are frequently affected by equatorial plasma bubbles (EPBs). Using scintillation measurements along the RO path (RO-S4), we can detect the occurrence of EPBs and reveal their global and seasonal distribution. We also investigate how they degrade the quality of ionospheric profiles derived from RO. Meanwhile, TRITON employs GNSS reflectometry (GNSS-R), in which oblique nadir-viewing antennas receive GNSS signals reflected from the Earth’s surface. By applying machine-learning classification to the coherence of reflected signals, both sea surface wind velocities and global surface water distribution can be derived. GNSS remote sensing provides a continuous, wide-area, and cost-effective tool, with expanding applications in Earth science and environmental monitoring.
關鍵詞：Equatorial Plasma Bubbles (EPBs), Hydrology, Radio Occultation (RO), GNSS reflectometry (GNSS-R), FORMOSAT-7/COSMIC-2, TRITON
