Design Satellite dish diameter

[Freshclean777]

knowing my longitude and my latitude, how to find the antenna diameter it takes to capture a certain beam for example to capture the beam "Europe ku" from India. What is the general calculation for any point and any beam?

 

[Channel Hopper]

You need to know the average downklink signal strength at the specific location, which will equate to an average dish size. There will also be a minimum level of signal necessary to overcome the noise that is generated by all the equipment used to collect a good signal, which requires a link budget calculation and is dependent on what you wish to receive.

Have a look at the footprint charts of the satellites here, some are official, some are a result of signals received once launched and the downlinks have been refined by the satellite operators.

www.lyngsat.com

 

[Analoguesat]

Some of the Hotbird 13E channels are receivable in India with reasonable sized dishes.

However which satellites are you particularly interested in - some of them we can advise "forget it" in India

 

[Terryl]

Try satbeams.com, it has active footprint maps that will give you an estimated dish size needed for that satellite and beam for your location.

 

[Freshclean777]

Thank you for your answers. so concretely, if I am for example in a city like Cotonou in Africa, how to determine the antenna diameter to reach astra or hotbird?
And Channel Hopper, how to find it from link budget calculation?

 

[Analoguesat]

Dont bother about link budgets as in Contonou in Benin then you dont get the European beams of Astra or Hotbird - you are just too far out of the coverage area!

You make do with the beams that cover West Africa.

 

[Freshclean777]

Ok