- Tundra orbit
Tundra orbit is a type of highly elliptical
geosynchronous orbitwith a high inclination(usually near 63.4°) and an orbital periodof one sidereal day(almost 24 hours). A satellite placed in this orbit spends most of its time over a chosen area of the Earth, a phenomenon known as apogee dwell. The ground trackof a satellite in a tundra orbit is a closed "figure-eight" lemniscate.
These are conceptually similar to
Molniya orbits which have the same inclination but half the period (about 12 hours). The only current user of tundraorbits is Sirius Satellite Radio, which operates a constellationof three satellites.
* [http://www.cubesat.auc.dk/documents/Mission_Analysis_Example.pdf Sample Mission Analysis] from the
Danish Space Research Institute(see page 8).
List of orbits
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