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On 2018-11-17 18:16, Jeff Findley wrote:

Update on Twitter from Elon today. SpaceX will not make the upper stage
of Falcon reusable. Concentrating on BFR/BFS.


Is there expectation that the thousands of satellites for that LEO
constellation will be launched by Falcon 9 or via BFR ?

Obviously Falcon 9 to start with since the FCC gave them a deadline for
having so many satellites launched. Possibly Falcon Heavy, but I'm
guessing these launches will be volume limited, not mass limited, so
Heavy wouldn't make any sense.

If SpaceX doesn't get the minimum number of satellites required by the
FCC up in time, they lose their license for the frequency bandwidth
allocated to them, which would be a "bad thing". The FCC doesn't want
companies buying up bandwidth and doing nothing with it. That would be
bad for consumers.

Obviously BFR would be cheaper in the long run since it will be fully
reusable, so once that's up and running they'll surely prefer to use
BFR.

While satellite operator wannabes tout their constantion as ultra fast,
you will note that they always omit one important metric: how much
uplink capacity will exist for each region served to connect the
satellite to the Internet. It's one thing to have 1gbps capacity
between a home and the satellite, but how many homes will connect to a
series of satellites at 1gnps and how many hopes to that satellite that
has the downloak to the earth station and how much capacity will that
one have ?

I'm pretty sure if you read the FCC documents related to Starlink, you'd
fine information like this. As for Starlink ground stations, they won't
be anything like traditional ground stations. If you read a few
articles on Starlink, you'd know this.

Satelite operators have over the years made many many promises, and
newer generation of satellites are faster, but in the end, by the time
service is available in retail, it is aways many generatiosn behind what
is expected for Internet connectivity.

Early Starlink satellites will have a 3 year lifetime, so they can
easily be replaced with upgraded satellites every 3 years. This
dovetails nicely with BFR. Essentially SpaceX will be launching
satellites every single year to keep the Starlink constellation up to
date.

Due to the high level of vertical integration of both satellites and
launch, SpaceX will be in a position to remain profitable while
undercutting the pricing of service provided by other large satellite
constellations.

Have fund with your 1gbps speed on satellite when you monthly usage is
limited to 5 GB.

I'm going to go out on a limb and guess that you just pulled that
"information" out of your ass. How can you know what the terms and
conditions for Starlink will be? I don't believe that anyone knows this
information yet because SpaceX isn't selling the service yet because
they don't have a satellite network in place yet.

Jeff
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