I wonder how snow on the cpe antenna will affect things.
From: Bill Prince
Sent: Monday, June 3, 2019 12:16 PM
To: [email protected]
Subject: Re: [AFMUG] SpaceX Says Its 60 Starlink Satellites Are All Phoning
Home (and Fading Out) | Space
That would be per satellite. So it doesn't really tell us what the system
capacity is. Don't forget there will be ~ 600 satellites per ring, and (I
think) 24 rings.
bp
<part15sbs{at}gmail{dot}com>
On 6/3/2019 10:18 AM, Adam Moffett wrote:
People always ask about system capacity, but it's simpler than that. Their
FCC filings show 2ghz of spectrum for the downlink from satellite to user
terminal. They have two polarities, not unlike us. We could generously assume
they'll get 10 bits/hz. That's 20gbps in a given geographic area. It doesn't
matter how many satellites there are, or what the capacity of a given satellite
is. I don't know how big that geographic area will be exactly.
-Adam
On 6/2/2019 6:15 PM, Bill Prince wrote:
There are whole bunches of risk factors.
Assuming the satellite-mesh system works (and that is still an if; note
that this first batch does not include the sat-sat laser link capability), I
have not seen a real estimate of the system capacity. I would presume there
would be separate earth stations for each orbital plane. There could even
conceivably be multiple earth stations for each orbital plane, which would make
the system capacity flexible.
IDK if they're making money or not, but they are serving body blows to the
competition.
There was open speculation that the Falcon heavy was going into a limited
demand situation, but now that it seems to be working (so far), that market
opportunity may be shifting as well.
bp
<part15sbs{at}gmail{dot}com>
On 6/2/2019 12:52 PM, Ken Hohhof wrote:
You’d think that SpaceX is highly profitable and is using those profits
to expand into the satellite Internet business. But actually there is debate
whether SpaceX is profitable without accounting tricks, and even if it is
profitable, the margins are very thin. Reportedly the geostationary launch
business is softening, and SpaceX is actually looking to Starlink for profits.
No doubt it helps if you can launch your own satellites, maybe even having them
ride along while you get paid to launch stuff for paying customers. But this
sounds like a pretty risky venture, paid for with borrowed money. If it wasn’t
risky, it wouldn’t be Elon, right?
From: AF mailto:[email protected] On Behalf Of Mike Hammett
Sent: Sunday, June 2, 2019 12:04 PM
To: AnimalFarm Microwave Users Group mailto:[email protected]
Subject: Re: [AFMUG] SpaceX Says Its 60 Starlink Satellites Are All
Phoning Home (and Fading Out) | Space
I would suspect they are going to have hundreds of earth stations as
opposed to one or two earth stations that legacy platforms have. Up to the
bird, maybe across one or two birds, and back down to the fiber-fed earth
stations. I've seen the numbers, but I forgot the numbers. It's real bandwidth
at each one.
-----
Mike Hammett
Intelligent Computing Solutions
Midwest Internet Exchange
The Brothers WISP
--------------------------------------------------------------------------
From: "Tim Withrow via AF" <[email protected]>
To: [email protected]
Cc: "Tim Withrow" <[email protected]>
Sent: Saturday, June 1, 2019 4:43:01 PM
Subject: Re: [AFMUG] SpaceX Says Its 60 Starlink Satellites Are All
Phoning Home (and Fading Out) | Space
What kind of bandwidth capacity could each satellite have at any given
point?
What is the usable bandwidth of their system? Who makes a radio that big
to carry/transmit such capacity or is it an
aggregate of small radio's?
--------------------------------------------------------------------------
On Saturday, June 1, 2019 Bill Prince <[email protected]> wrote:
Naturally, we're all thinking about what effect this will have in rural
America, but I am also wondering if this would have some effect on China's
"great firewall"?
bp<part15sbs{at}gmail{dot}com> On 6/1/2019 1:47 PM, Ken Hohhof wrote:
I think one factor advocacy groups and govt critters need to keep in mind
is that instead of robust competition, what could occur is “disruptive”
pricing, having the effect of discouraging or bankrupting the competition. And
now some new entrant is the only game in town. And if it turns out to be
unreliable, or not to have enough capacity, or their speeds are actually best
effort, or their satellites start dropping out of the sky, or whatever, people
can’t switch back to their old provider. Like being dissatisfied with online
stores and assuming you can always switch back to the old brick and mortar
store, from Uber and Lyft back to taxis and limos. Sorry, they don’t exist
anymore.
This is unlikely to happen in big cities, I doubt Comcast will go
bankrupt because of Starlink. But to just assume there will be lots of choices
out in the middle of nowhere driving the price down without any of them turning
off the lights, seems a little naïve.
And to assume big megacorps like SpaceX, Amazon, Googe, Facebook, etc.
would never price below cost to be “disruptive” also seems naïve.
From: AF mailto:[email protected] On Behalf Of Bill Prince
Sent: Saturday, June 1, 2019 3:20 PM
To: [email protected]
Subject: Re: [AFMUG] SpaceX Says Its 60 Starlink Satellites Are All
Phoning Home (and Fading Out) | Space
Sure. But after the clouds, geostationary still needs to go another
23,000 miles. LEO only has to go a few hundred.
bp<part15sbs{at}gmail{dot}com> On 6/1/2019 10:47 AM, Mathew Howard wrote:
Clouds are generally a lot lower than a couple hundred miles...
On Sat, Jun 1, 2019, 10:58 AM Bill Prince <[email protected]> wrote:
Maybe at geostationary distances, but these are only a few hundred
miles up.
bp
<part15sbs{at}gmail{dot}com>
On 6/1/2019 8:56 AM, Matt Hoppes wrote:
> Don't those bands have significant attenuation issues with like...
> clouds?
>
> On 6/1/19 10:55 AM, Bill Prince wrote:
>> According to Wikipedia, they will be on Ku, Ka, and V bands.
>>
>> https://en.wikipedia.org/wiki/Starlink_(satellite_constellation)
>>
>> bp
>> <part15sbs{at}gmail{dot}com>
>>
>> On 6/1/2019 7:46 AM, Jaime Solorza wrote:
>>> Wonder what frequencies they will use?
>>>
>>>
https://www.space.com/spacex-starlink-satellites-phone-home-dimming.html
>>>
>>>
>>
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