ABOUT TUNDRA ORBIT
The Tundra Orbit is a highly elliptical geosynchronous orbit with a 24-hour period and 63.4-degree inclination. Like the Molniya orbit, it exploits the critical inclination to prevent apsidal precession. Its longer period means the satellite spends more time near apogee, providing extended coverage of high-latitude regions with fewer satellites.
ORBITAL PARAMETERS
| Altitude (Min) | 1,000 km |
| Altitude (Max) | 46,300 km |
| Inclination | 63.4° |
| Orbital Period | 1436 minutes |
| Orbital Velocity | 10.5 km/s |
| Delta-V Required | 10.0 km/s |
| Eccentricity | 0.26 |
| Category | Highly Elliptical |
EQUATION / FORMULA
Critical inclination: i = 63.4°, P = 1 sidereal day
ADVANTAGES & DISADVANTAGES
ADVANTAGES
Only two satellites needed for continuous high-latitude coverage, 24-hour period simplifies ground operations
DISADVANTAGES
Complex orbit maintenance, radiation exposure, less proven than Molniya
HISTORY
| Discoverer / Pioneer | Orbital mechanics concept, Cold War era |
| First Use | January 1, 1971 |
ALTITUDE CONVERSIONS (MIN)
| Kilometers | 1,000 km |
| Miles | 621 mi |
| Nautical Miles | 540 nmi |
TYPICAL PAYLOADS (3)
SATELLITE CONSTELLATIONS (1)
