TUNDRA ORBIT

'Tundra orbit' is a type of highly elliptical orbit with a high inclination (usually near 63.4°) and an orbital period of 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.
These are conceptually similar to Molniya orbits which have the same inclination but half the period (about 12 hours). The only user of Tundra orbits is Sirius Satellite Radio, which operates a constallation of three satellites.

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References

See also

References

★ Sample Mission Analysis from the Danish Space Research Institute (see page 8).

See also

★ List of orbits