Well. More details. The planned launch on Wednesday will contain 60
Starlink version 0.9 satellites. That's the upper end of what was hinted
at earlier.
https://www.teslarati.com/spacex-starlink-satellites-tease-revolutionary-design/
bp
<part15sbs{at}gmail{dot}com>
On 5/9/2019 2:28 PM, Robert Andrews wrote:
Phased array lasers? or more properly Optical phased array
transmitter...
On 05/09/2019 02:19 PM, [email protected] wrote:
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:* [email protected]
*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, [email protected] 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:* [email protected]
*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:[email protected] On Behalf Of Robert Andrews
Sent: Thursday, April 4, 2019 7:03 PM
To: [email protected]
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:[email protected] *On Behalf Of *Chuck
McCown
*Sent:* Wednesday, March 20, 2019 12:09 PM
*To:* [email protected]
*Subject:* [AFMUG] Real threat
Or is the sky falling?
https://www.reddit.com/r/Starlink/comments/7zqm2c/starlink_faq/
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