Low Earth Orbits (LEO) - 200km < LEO < 2000km
Low Earth Orbits pass through the proton and electron particles trapped in the Van Allen belts several times each day.
- Missions using DDC products include ISS, Hubble, Gonets, Proba III, ALOS, GOSAT, Meteor-3, and Pleiades.
Medium Earth Orbits (MEO) 2000km < MEO < 35000km
Medium Earth Orbits pass through the Van Allen belts each day, but also have long exposures to the cosmic ray and solar flare environments regardless of their inclination.
- Missions using DDC products include GPS, Galileo, and Glonass.
Geostationary Earth Orbits (GEOs) and Near-Earth Interplanetary GEO = 35760km, L2 = 1,500,000km
Geostationary Earth Orbits are exposed to galactic cosmic rays and solar flare particles.
- Missions using DDC products include Gaia, JWST, Kepler, Planck, Dawn, Hershel Space Observatory, and Jason.
Interplanetary Missions are exposed to galactic cosmic rays, solar flare particles, planets, asteroids, and comets.
- Missions using DDC products include Messenger, OSIRIS-REx, Rosetta, Juno, and Mars Curiosity Rover.