The most useful communication satel- lites are those in geostationary orbits. A satellite in geostationary orbit remains above the same point on the Earth's
The most useful communication satel- lites are those in geostationary orbits. A satellite in geostationary orbit remains above the same point on the Earth's
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Transcribed Image Text:The most useful communication satel-
lites are those in geostationary orbits. A
satellite in geostationary orbit remains
above the same point on the Earth's
Transcribed Image Text:North
Pole
London ilatitude 51'N
51
Equatorial
plane
Not to scale
Satellite
surface at all times. This is only possible
when the satellite is in an orbit in the
equatorial plane. Only 'line of sight'
. communication is possible in satellite
communications. This means that com-
munication can only occur provided
there is no obstruction between the
transmitter, dhe satellité and the
receiver.
(i) The relationship between the
period T and radius R of an orbit
is
T = kR
where k is a čonstant.
Using your answer to (a) (iv)
determine the radius of the orbit
for a geostationary satellite.
(ii) Estimate the delay between the
transmission and reception of a
signal using the satellite. Show
how you arrive at your answer.
(iii) Calculate the most northerly lati-
tude for which satellite communi-
cation is possible.
(iv) State with reasons how many
satellites are needed to provide
communication
between
all
places on the equator and indicate
on a diagram how this can be
achieved.
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