I don't think it is quite that high. Maybe on the order of 20 Gb/s. > Each satellite in the SpaceX System provides aggregate downlink capacity to users ranging

I don't think it is quite that high. Maybe on the order of 20 Gb/s. > Each satellite in the SpaceX System provides aggregate downlink capacity to users ranging from 17 to 23 Gbps, depending on the gain of the user terminal involved. Assuming an average of 20 Gbps, the 1600 satellites in the Initial Deployment would have a total aggregate capacity of 32 Tbps. https://fcc.report/IBFS/SAT-LOA-20161115-00118/1158349 https://fcc.report/IBFS/SAT-LOA-20161115-00118/1158349 They have a couple of GHz of bandwidth on the satellites for each of the user downlinks/ground station uplinks, and maybe a GHz for the user uplinks/ground station downlinks, operating in the Ku (12-18 GHz) and Ku (27-40 GHz) bands (requested frequencies on page 8 of the linked paper.)