On this particular one, the gateway beams are extremely narrow, around 1.5º to 2.5º. SpaceX is working on “mega-gateways” where 32 antennas will co-exist. They are also deploying a new gateway design with a larger antenna, and thus narrower beamwidth and more gain, allowing for a considerable reduction in TX power.
Best, Mike On Aug 31, 2022, 09:33 +0200, David Lang via Starlink <[email protected]>, wrote: > On Wed, 31 Aug 2022, Ulrich Speidel via Starlink wrote: > > > This combines with the uncomfortable truth > > that an RF "beam" from a satellite isn't as selective as a laser beam, > > so the options for frequency re-use from orbit aren't anywhere near as > > good as from a mobile base station across the road: Any beam pointed at > > you can be heard for many miles around and therefore no other user can > > re-use that frequency (with the same burst slot etc.). > > not quite, you are forgetting that the antennas on the ground are also > steerable > arrays and so they can focus their 'receiving beam' at different satellites. > This is less efficient than a transmitting beam as the satellites you aren't > 'pointed' at will increase your noise floor, but it does allow the same > frequency to be used for multiple satellites into the same area at the same > time. > > David Lang > _______________________________________________ > Starlink mailing list > [email protected] > https://lists.bufferbloat.net/listinfo/starlink
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