Constellation Observing System for Meteorology, Ionosphere, and Climate

Cosmic (meteorological satellites) logo.png
Operator COSMIC
Major contractors Orbital Sciences Corporation
Mission type Meteorology, Ionosphere, Climatology, and Space weather research.
Satellite of Earth
Launch date 15/04/06 at 01:40 GMT
Launch vehicle Minotaur
Mission duration 5 years
COSPAR ID 2006-011A
Homepage COSMIC at UCAR
Mass 155 lb
Orbital elements
Eccentricity 0
Inclination 72 degrees
Apoapsis 500km (original) 800km (final)
Periapsis 500km (original) 700km (final)

Constellation Observing System for Meteorology, Ionosphere, and Climate[citation needed] (COSMIC) is a program designed to provide advances in meteorology, ionospheric research, climatology, and space weather by using GPS satellites in conjunction with low Earth orbiting (LEO) satellites. The term "COSMIC" may refer to either the organization itself or the constellation of satellites (also known as FORMOSAT-3, 福爾摩沙衛星三號, in Taiwan). The constellation is a joint U.S.-Taiwanese project with major participants including the University Corporation for Atmospheric Research (UCAR), the National Science Foundation, the Naval Research Laboratory (NRL), the Air Force Research Laboratory (AFRL) on the U.S. side and the National Space Organization (NSPO) on the Taiwanese side.

The total cost of the project is US$100 million, 80% of which is being provided by NSPO, and the remainder by various U.S. agencies.[1]

After experiencing several delays, the launch of the COSMIC satellite constellation atop a Minotaur launch vehicle from Vandenberg AFB occurred at 01:40 GMT, on April 15, 2006, despite heavy fog.[2] The satellites, which orbit at an altitude of 500 miles, required over a year to move into the correct positions to provide full global coverage.



Components of a FORMOSAT-3 / COSMIC satellite

The COSMIC satellites are be equipped with three primary forms of instrumentation for remote sensing, including:

Sources: [3]


All 6 microsatellites were launched on a single launch vehicle and deployed into a single parking orbit after launch. The spacecraft were then deployed into separate orbital planes through the use of precession due to the oblateness of the Earth and raised to a final orbital altitude over the course of several months. Scientific data were collected during the deployment process, along with experimental validation and calibration.


Currently only four of the microsatellites remain fully functional. The FM2's power system lost 50% of its output in February 2007, while FM3's solar panel also malfunctioned since August 2007. As a result, both satellites are operating in a degraded state, capable of returning data only during specific solar angles. The FM6 went out of control on September 2007, but control was restored by November 16 of the same year.[4][5] FM3 had severe power problem since July 6 2010. It is declared no function since them. FM4, FM5, and FM6 has battery aging problem. So right now FM1 is the only FM remains fully functional.

Orbital information

Parking orbit

Final orbital configuration

See also

Notes & references

External links

Comparison of COSMIC ionospheric measurements with ground-based observations and model predictions: Preliminary results 12 December 2006

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