AMT-70/AMT-73/AMT-75 Installation and Operation
Where:
s = satellite distance from center of earth = 42165Km
e = radius of the earth = 6370Km
a = latitude of antenna (in degrees)
b = longitude of satellite (in degrees)
c = longitude of antenna (in degrees)
d = distance from antenna to satellite (in Km)
The sign of +/- in the azimuth calculation is determined by the relative positions of the antenna and
satellite. 180
° is due south. If the satellite is east of the antenna the result of the calculation is
subtracted from 180. If the satellite is west of the antenna the result of the calculation is added to 180.
Example
: Pointing an antenna at SES-ASTRA 1F (longitude b= +19.3°), from London, UK (latitude a =
51.5
°, longitude c = -1.4°)
()
()
() ( )
o
o
48.150
4.12.19sin421653880097.27cos
4.12.19sin42165
tan180
97.27
3880063702
38800637042165
sin
38800)4.12.19cos()5.51cos(6370416252637042165
22
1
222
1
22
=
⎟
⎟
⎠
⎞
⎜
⎜
⎝
⎛
+⋅−⋅
+⋅
−=
=
⎟
⎟
⎠
⎞
⎜
⎜
⎝
⎛
⋅⋅
−−
=
=+⋅⋅⋅⋅−+=
−
−
Azimuth
Elevation
Kmd
136
To Next Page
Loading...