Howtosignalprocessing
- What is Doppler shift in satellite?
- How much area can a LEO satellite cover?
- How many LEO satellites does it take to cover the Earth?
What is Doppler shift in satellite?
The Doppler shift is observed when a source of waves is moving in relation to an observer or vice versa. This movement produces a change in frequency in relation to observer. Without loss of generality, we will focus on the case where the source is approaching the destination.
How much area can a LEO satellite cover?
Coverage of the Starlink satellites. Earth's area is 510 million km2, thus with a LEO satellite at an altitude of 550 km under an elevation of 40°, an area of 0.00206 × 510 million km2 = 1.05 million km2 is covered, with an approximate radius of 580 km.
How many LEO satellites does it take to cover the Earth?
At an elevation of 36,000 km, coverage from a satellite is 2.7 wider than it is at 1000km above the surface of the Earth. When three satellites are required to cover the Earth on GEO, at least 15 are required to cover the whole Earth on LEO.
