![]() ![]() The GPS RO dual-frequency L-band phase and amplitude measurements can be used to observe absolute Total Electron Content (TEC) and scintillation on lines of sight between the LEO and GPS satellites, and electron density profiles via the RO method. ![]() COSMIC has collected a large amount of useful data from these scientific payloads and is still currently collecting up to 1,000 RO measurement events per day on average. The Constellation Observing System for Meteorology Ionosphere and Climate ( COSMIC), a joint US/Taiwan mission launched in April 2006, is a six micro- satellite constellation carrying Global Positioning System (GPS) radio occultation (RO) receivers. Measurements from constellations of low Earth orbiting (LEO) satellites are proving highly useful for ionospheric science and space weather studies. Satellite Constellations for Space Weather and Ionospheric Studies: Overview of the COSMIC and COSMIC-2 Missions
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