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Doubt about propagation time

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one of my teacher told that in normal cases Tp=d/v

but in question if it is given a link between satelite and any object in earth,then it should be Tp=2d/v

is it correct?

1 Answer

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Normally, a packet travels from source to destination. For a satellite communication, it travels from source to satellite and then from satellite to destination. Depending on what $d$ is the formula changes here. Of course one should never remember such formula unless there is free RAM and no CPU.
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