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GX
G
G
Paradigm
Skew
Calculation
Chart
Feed
Earth station latitude in degrees, north or south of the equator.
To calculate the required skew angle of the satellite terminal:
1.
Confirm the current earth station latitude in degrees on the horizontal axis.
2.
Confirm the correct curve for the delta (Δ) in degrees between the earth station longitude
and the satellite longitude.
3. Read off the vertical axis for the skew angle.
Example:
Earth station location: 001° 02’ 49” W 51° 09’ 02” N (51.151°, -001.047°)
Satellite Location:
62.6° E
Longitude Delta:
(-001.047 - 62.6) = -63.65°
Skew
angle:
-35.5°
Skew Angle
Polarisation Chart Sign
Values (+ or -)
Northern
Hemisphere
Southern
Hemisphere
Antenna Site West of Satellite
Longitude
-
+
Antenna Site East of Satellite
Longitude
+
-
FEED ROTATION
(Facing Antenna)
For + Polarisation Rotate Counter Clockwise
For - Polarisation, Rotate Clockwise
