The Eutelsat 4xDVB-S2 system was using 72Mbps in total. I seem to remember Eutelsat has some wideband transponders so I guess it was using one of those.
The Astra service was running over an 18Mbps stream. The actual stream was constant bit rate but it consisted of a content that was pre-encoded with a variable bit rate that averages 8Mbps. They filled the space with blank data to make the CBR signal to ease the real-time decoding, which was being done by a pre-production decoder chip for future set-top boxes.
An Astra rep told me he expects two 4K channels per conventional transponder.
MicroHD with Winegard 1m dish, DG380 motor, Geosat Pro SL1 LNB on ku band. 83W to 123W visible.
Perfect 10 7.5ft C-band dish from 87W to 121W, NS741 LNB controlled by General Instrument 550i analog receiver and Von Weise actuator.
Been into satellite TV since 1989 (Astra 1A). Started the English-language news service of Tele-Satellit magazine in early nineties.