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EARTH ORBIT

Polar Orbit

200 – 1,000 kmALTITUDE
88-105PERIOD (MIN)
7.5VELOCITY (KM/S)
9.5DELTA-V (KM/S)
80-100°INCLINATION
ABOUT POLAR ORBIT

A Polar Orbit has an inclination of approximately 90 degrees, passing over or near both poles on each revolution. As Earth rotates beneath the satellite, a polar orbit eventually covers the entire surface. This makes it invaluable for global mapping, weather observation, and reconnaissance missions.

ORBITAL PARAMETERS
Altitude (Min)200 km
Altitude (Max)1,000 km
Inclination80-100°
Orbital Period88-105 minutes
Orbital Velocity7.5 km/s
Delta-V Required9.5 km/s
Eccentricity0-0.01
CategoryEarth Orbit
EQUATION / FORMULA
v = sqrt(GM/r)
ADVANTAGES & DISADVANTAGES

ADVANTAGES

Full global coverage including poles, excellent for mapping and reconnaissance

DISADVANTAGES

Cannot maintain constant ground station contact, higher delta-v from non-polar launch sites

HISTORY
Discoverer / PioneerTheoretical: orbital mechanics
First UseApril 1, 1960
ALTITUDE CONVERSIONS (MIN)
Kilometers200 km
Miles124 mi
Nautical Miles108 nmi
TYPICAL PAYLOADS (4)
  • Weather satellites
  • Reconnaissance
  • Earth observation
  • Search and rescue
SATELLITE CONSTELLATIONS (3)
  • NOAA POES
  • DMSP
  • Iridium

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