Outer Space - Battlefield of the Future? by Sipri

Author:Sipri [Sipri]
Language: eng
Format: epub
ISBN: 9781000263428
Barnesnoble:
Publisher: Taylor & Francis
Published: 2021-01-26T00:00:00+00:00

The total area of the Earth covered by a satellite at any time is bounded by a circle the radius of which is a function of satellite altitude h and minimum allowable Earth antenna-elevation angle α (Figure 4.2). In the case of an equatorial synchronous satellite, the Earth coverage area is fixed, whereas for a non-synchronous satellite in a circular orbit the coverage area is circular, fixed in size and moving continuously over the Earth’s surface.

Figure 4.2. Satellite coverage geometry. φ = 90° (α + θ); h = height of satellite above the Earth; Rs = slant range, terminal-to-satellite; Re = radius of Earth; α = elevation angle at terminal; θ = angular radius of visibility; C = centre of the Earth; As = coverage area.

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