Orbits
Technology · कक्षाएं · 15 facts
LEO (Low Earth Orbit) is 200-2000 km above Earth
GEO (Geostationary Orbit) is about 35,786 km above equator
MEO (Medium Earth Orbit) is between LEO and GEO
Polar orbit passes over both poles of Earth
Sun-synchronous orbit keeps same sun angle for imaging
ISS orbits Earth at about 400 km altitude
GPS satellites orbit in MEO at about 20,200 km
Lagrange Point L1 is between Earth and Sun (Aditya-L1)
Transfer orbit is used to move satellite from LEO to GEO
Escape velocity from Earth is about 11.2 km/s
Geosynchronous orbit completes one revolution in 24 hours like Earth's rotation
PSLV launches mostly into Sun-synchronous orbit; GSLV for geostationary orbit
Kepler's First Law: Planets/satellites move in elliptical orbits with focus at Sun/Earth
India's PSLV has 55+ successful launches, most reliable rocket in Indian space history
Low Earth Orbit satellites decay faster due to atmospheric drag; need periodic boosting