Page 39 - SATELLITE AND RADAR COMMUNICATION SYSTEM

Satellite Bus

The basic characteristics of each of the bus subsystems are described

here:

1. The physical structure

The physical structure of the satellite provides a “home” for all of the

components of the satellite. The basic shape of the structure depends of
the method of stabilization employed to keep the satellite stable and

pointing in the desired direction, usually to keep the antennas properly
oriented toward earth. Two methods are commonly employed: spin
stabilization, and three-axis or body stabilization. Both methods are used

for Geostationary Satellite Orbit (GSO) and for Non-Geostationary Satellite
Orbit (NGSO). Figure 2.6 highlights the basic configurations of each, along

with an example of a satellite of each type.

Figure 2.6: Physical structure

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Satellite System Elements