These are the guys the landed a rocket ship on its tail feathers on a tiny
barge in open ocean...
They can obviously do difficult things.
From: Adam Moffett
Sent: Thursday, May 9, 2019 2:56 PM
To: af@af.afmug.com
Subject: Re: [AFMUG] Real threat
I got into a discussion on Quora about this the other day.
Their FCC filing says they'll use 2000mhz of bandwidth for the Satellite to
User Terminal downlink. However many satellites they have, they'll be limited
to 2000mhz per geographic area. If we generously assume 10 bits/hz then that's
20gbps. That's useful, especially in rural areas, but it's not enough to
replace cable or fiber like some pundits seem to think
Consider the trouble you can have coordinating channels for 50 or 100
stationary towers. Apply that problem to thousands of moving satellites.
That's a serious engineering problem in and of itself. Maybe do-able in
software, but not easy.
A person in the discussion pointed out that if the satellites are going to use
lasers to communicate with each other then they'll have to keep adjusting
alignment on those lasers constantly. The servo aiming the laser must apply
torque to the satellite which has to be countered by either propellant or maybe
a counter rotating motor on the other side of the satellite. It wouldn't be a
big deal except they're moving constantly, so that's another big engineering
problem.
They also have to manage station keeping and maintenance for 7 times the number
of man-made satellites currently in operation for the whole world.
The potential for better rural internet is nice and all, but if they really get
all of this working it's an engineering feat on par with building the pyramids.
-Adam
On 5/8/2019 5:09 PM, Bill Prince wrote:
So we are roughly a week away from seeing how quickly this can scale.
https://www.teslarati.com/spacex-schedules-starlink-launch-debut/
bp
<part15sbs{at}gmail{dot}com>
On 4/18/2019 7:42 AM, ch...@wbmfg.com wrote:
Visible antennas
Cost per mbps
Latency
I will keep my head in the sand.
From: dave
Sent: Thursday, April 18, 2019 8:15 AM
To: af@af.afmug.com
Subject: Re: [AFMUG] Real threat
LOL... Yep..
On 4/18/19 9:05 AM, Bill Prince wrote:
Well, well, well. Reality may be rearing its ugly head...
https://seekingalpha.com/article/4254917-spacex-backtracking-satellite-internet-puts-future-profits-doubt
bp
<part15sbs{at}gmail{dot}com>
On 4/4/2019 5:21 PM, Ken Hohhof wrote:
Sounds like a job for Space Force.
Actually, I'm a little confused. Will these LEO sats be 5G? What good
are
they if they aren't 5G? How are we going to get remote surgery and
self-driving vehicles without 5G?
I wish these big corporations would make up their minds, do I need a
small
cell 1000 feet away because <reasons>, or do I need thousands of
satellites
whizzing overhead 50 miles up? Seems like polar opposites, but
apparently
we gotta have 'em.
-----Original Message-----
From: AF mailto:af-boun...@af.afmug.com On Behalf Of Robert Andrews
Sent: Thursday, April 4, 2019 7:03 PM
To: af@af.afmug.com
Subject: Re: [AFMUG] Real threat
And one more Indian anti-sat test to turn it all into chaff...
On 04/04/2019 04:34 PM, Bill Prince wrote:
So now in addition to Elon and his thousands of satellites, and
OneWeb
with their thousands of satellites, we will now add Bezos and another
few thousand satellites:
https://www.reuters.com/article/us-amazon-com-broadband/amazon-plans-t
o-launch-over-3000-satellites-to-offer-broadband-internet-idUSKCN1RG1Y
W
bp
<part15sbs{at}gmail{dot}com>
On 3/20/2019 10:30 AM, Ken Hohhof wrote:
Oh, no, Elon will be able to market it to all Tesla owners! And
have
kiosks in all the Tesla stores! We're doomed!
So I guess what I'm saying is technology doesn't sell, marketing
sells, and it all depends on who they partner with to actually sell
service to end customers. Also of course they are not the only
company doing this. OneWeb for example. SpaceX has the advantage
of
having their own launch service and being able to piggyback on
other
payloads.
*From:* AF mailto:af-boun...@af.afmug.com *On Behalf Of *Chuck
McCown
*Sent:* Wednesday, March 20, 2019 12:09 PM
*To:* af@af.afmug.com
*Subject:* [AFMUG] Real threat
Or is the sky falling?
https://www.reddit.com/r/Starlink/comments/7zqm2c/starlink_faq/
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