Page 145 - Satellite Communications, Fourth Edition
P. 145
Polarization 125
All these vectors can be related to the known coordinates of the earth
station and satellite shown in Fig. 5.10. With the longitude of the satel-
lite as the reference, the satellite is positioned along the positive x axis at
(5.14)
s
x a GSO
The coordinates for the earth-station position vector R are (ignoring
the slight difference between geodetic and geocentric latitudes and
Z
R z
R
R y
y
λ
r = –R B
R x
k
a GSO = x S
Geostationary
satellite
Figure 5.10 Vectors k and R in relation to satellite and earth station positions.
