Try the following pagehttp://www.satsig.net/linkbugt.htm
It is an on-line calculator. Enter your data and see if it gives a useful result.
You can find Satellite Link Budget freeware using those 3 search words in Google.
8 psk is just the modulation encoding that enables the bandwidth for a certain information rate on the serial datastream to be calculated. It effects the Bit Error Ratio for a particular value of Carrier Power/Noise Power and convolutional coding/forward error correction. Ignore it for now.
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