2 ms·
Not necessarily. These types of orbits also have the property that the perceived loiter time is different for the perigee and apogee. At perigee (closest to E
by everfrustrated 2y ago
Not necessarily.
These types of orbits also have the property that the perceived loiter time is different for the perigee and apogee.
At perigee (closest to Earth) it will be moving very fast and so any changes to velocity will have a large impact (easily change orbit).
While at apogee it will appear to sit in space and move quite slowly. As an example this is used for the Russian GPS system so their satellites can sit in high earth latitudes for longer needing fewer satellites to cover Russia.
- xattt 2y agoIsn’t GLONASS in geostationary orbit like NAVSTAR/GPS? This would be a fixed orbital distance from Earth. You may be thinking of highly-elliptical molniya/lightning orbits (1), which enabled state TV broadcasts for high-lat places in Siberia. (1) https://en.m.wikipedia.org/wiki/Molniya_orbit https://en.m.wikipedia.org/wiki/Molniya_orbit
- rcxdude 2y agoGps isn't in geostationary orbit. They're in medium earth orbit and complete an orbit about twice a day
- inejge 2y agoAs an example this is used for the Russian GPS system so their satellites can sit in high earth latitudes for longer needing fewer satellites to cover Russia. It's used for communications satellites and is called the Molniya orbit[1]. Their GLONASS (positioning system) satellites use circular medium altitude orbits, but with a higher inclination (about 65 deg vs. GPS's 55 deg). [1] https://en.wikipedia.org/wiki/Molniya_orbit https://en.wikipedia.org/wiki/Molniya_orbit