- Design Principles
Orbit Satellite Systems - Introduction
Until the late 1980s satellites
in non-geostationary orbit had limited use for communication applications
because, in general, these systems are more complex and, since geostationary
satellites met most requirements anyway, not much effort was spent
on their development.
However, since the beginning
of the 1990s there has been considerable interest throughout the
world in the use of various types of non-geostationary orbits. In
this chapter we will discuss the reasons behind the revival of this
interest, considerations in design of a non-geostationary constellation
with an example, and various types of network-related issues. We
will then give examples of some of the more technically interesting
emerging non-geostationary systems.