Satellite Internet Providers Details
There are over 300 communications satellites in the geostationary orbit,
directly above the equator, spaced typically 2 or 3
degrees apart. Because they orbit the earth at the same speed and in the
same direction as the earth rotates they remain fixed in the sky and
you can
use a fixed pointing very small aperture terminal (VSAT) to communicate.
The maximum possible coverage area from any one orbit position is
approx one
third of the earth, as that is all that is visible from the orbit
position at a height of 35726 km. For example, a
satellite above the equator to south of India can provide coverage
which includes South Africa, Europe to Japan and Australia, as well as
India which
is almost directly below it. To help with small dish operations spot
beams are pointed down at particular areas. This web site
shows many such beam coverage areas. In general smaller spot beams
permit smaller earth station dishes. The satellites are owned by large
multinational companies or by specific national companies.
Intelsat, NewSkies and Eutelsat are examples
of international and regional operators providing satellite internet capacity.
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