Journal
BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY
Volume 101, Issue 7, Pages E1107-E1136Publisher
AMER METEOROLOGICAL SOC
DOI: 10.1175/BAMS-D-18-0290.1
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Funding
- National Science Council
- National Space Office in Taiwan
- NSF
- NASA
- NOAA
- Copernicus Climate Change Service
- Austrian Science Fund (FWF) [P27724-NBL]
- U.S. National Science Foundation
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Launched in 2006, the Formosa Satellite Mission 3-Constellation Observing System for Meteorology, Ionosphere and Climate (FORMOSAT-3/COSMIC) was the first constellation of microsatellites carrying global positioning system (GPS) radio occultation (RO) receivers. Radio occultation is an active remote sensing technique that provides valuable information on the vertical variations of electron density in the ionosphere, and temperature, pressure, and water vapor in the stratosphere and troposphere. COSMIC has demonstrated the great value of RO data in ionosphere, climate, and meteorological research and operational weather forecasting. However, there are still challenges using RO data, particularly in the moist lower troposphere and upper stratosphere. A COSMIC follow-on constellation, COSMIC-2, was launched into equatorial orbit in 2019. With increased signal-to-noise ratio (SNR) from improved receivers and digital beam steering antennas, COSMIC-2 will produce at least 5,000 high-quality RO profiles daily in the tropics and subtropics. In this paper, we summarize 1) recent (since 2011 when the last review was published) contributions of COSMIC and other RO observations to weather, climate, and space weather science; 2) the remaining challenges in RO applications; and 3) potential contributions to research and operations of COSMIC-2.
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