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SATCOM Engineering Ref. (click here)
Lots of reference data regarding satellite telecom, antennas and measurements. Includes several Excel RF calculator tools.

Online satellite link budget calculator: Satellite Link Budget Calculator  

Excellent online RF engineering resources are at these links:

http://www.satellite-calculations.com

http://www.radioing.com/eengineer/index.html

http://www.rfcafe.com/references/calculators.htm

Intelsat COB - Intelsat Center Of Box Ephemeris Data: Find your region (Afghan uses Indian Ocean Region), use the drop down menu to go to your bird and then click the "view" box to see predicted COB data.

Telesat COB - Anik F1, Anik F1R, Anik F2, Anik F3, Nimiq 1, Nimiq 2, Nimiq 4, Telstar 11N, Telstar 12, Telstar 14, Telstar 18
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