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Re: Posting picture files

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On Mon, May 02, 2016 at 07:08:07PM -0500, John Hasler wrote:
> Ralph Sanchez writes:
> > I guess a lot of those 2.1 million customers probably live in very
> > rural areas where maybe other forms aren't available, or the cost to
> > lay wire would be more then they have. My thinking is, we have GPS
> > that works nearly (ok maybe not) everywhere you'd go and want
> > internet, so why hasn't some billionaire or multi-billion or trillion
> > dollar company decided to provide a wifi type service in the same way?
> 
> GPS requires many orders of magnitude less bandwidth than does Internet
> service.  There is satellite Internet service and some people in remote
> areas use it.  However the present version has serious drawbacks.  Elon
> Musk plans to change that.

In particular, GPS is a one way service. Point your receiver at
the sky, let it see several satellite's radio beacons. Each
beacon emits a short pulse train encoding the satellite's
position and a very accurate timestamp. Your receiver does the
math and now knows where it is and what the time is.

The total bandwidth from a satellite is just over 1 megabit per
second. If it had to be shared among various receivers, it would
be completely overwhelmed by demand. But as a broadcast signal,
it is very effective.

-dsr-

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Posting picture files Gary Roach <gary719_list1@verizon.net> - 2016-05-01 03:20 +0200
  Re: Posting picture files Gene Heskett <gheskett@shentel.net> - 2016-05-01 05:30 +0200
    Re: Posting picture files Vincent Lefevre <vincent@vinc17.net> - 2016-05-02 12:20 +0200
      Re: Posting picture files Gene Heskett <gheskett@shentel.net> - 2016-05-02 16:10 +0200
        Re: Posting picture files Lisi Reisz <lisi.reisz@gmail.com> - 2016-05-02 16:20 +0200
        Re: Posting picture files Gary Roach <gary719_list1@verizon.net> - 2016-05-03 01:40 +0200
          Re: Posting picture files Ralph Sanchez <rwsanchez3@gmail.com> - 2016-05-03 01:50 +0200
            Re: Posting picture files John Hasler <jhasler@newsguy.com> - 2016-05-03 02:10 +0200
              Re: Posting picture files Dan Ritter <dsr@randomstring.org> - 2016-05-03 16:40 +0200
          Re: Posting picture files Lisi Reisz <lisi.reisz@gmail.com> - 2016-05-03 02:10 +0200
            Re: Posting picture files Gary Roach <gary719_list1@verizon.net> - 2016-05-03 05:20 +0200
              Re: Posting picture files Lisi Reisz <lisi.reisz@gmail.com> - 2016-05-03 11:10 +0200
              Re: Posting picture files "heqamilus@runbox.com" <heqamilus@runbox.com> - 2016-05-03 16:00 +0200
                Re: Posting picture files Gary Roach <gary719_list1@verizon.net> - 2016-05-03 21:50 +0200
                Re: Posting picture files cbannister@slingshot.co.nz - 2016-05-10 20:40 +0200
          Re: Posting picture files Felix Miata <mrmazda@earthlink.net> - 2016-05-03 05:50 +0200
            Re: Posting picture files Brian <ad44@cityscape.co.uk> - 2016-05-03 13:10 +0200
              Re: Posting picture files Felix Miata <mrmazda@earthlink.net> - 2016-05-03 14:00 +0200
                Re: Posting picture files Brian <ad44@cityscape.co.uk> - 2016-05-03 14:30 +0200
          Re: Posting picture files Bob Holtzman <holtzm@cox.net> - 2016-05-04 00:10 +0200
  Re: Posting picture files Lisi Reisz <lisi.reisz@gmail.com> - 2016-05-01 13:30 +0200
    Re: Posting picture files Gene Heskett <gheskett@shentel.net> - 2016-05-01 16:50 +0200
      Re: Posting picture files Sven Arvidsson <sa@whiz.se> - 2016-05-01 17:10 +0200
        Re: Posting picture files Lisi Reisz <lisi.reisz@gmail.com> - 2016-05-01 17:20 +0200
        Re: Posting picture files Gene Heskett <gheskett@shentel.net> - 2016-05-01 18:10 +0200
          Re: Posting picture files Richard Hector <richard@walnut.gen.nz> - 2016-05-02 03:00 +0200
          Re: Posting picture files Felix Miata <mrmazda@earthlink.net> - 2016-05-03 06:10 +0200
          Re: Posting picture files cbannister@slingshot.co.nz - 2016-05-10 20:40 +0200
            Re: Posting picture files Brian <ad44@cityscape.co.uk> - 2016-05-10 21:00 +0200
              Re: Posting picture files cbannister@slingshot.co.nz - 2016-05-13 14:30 +0200
  Re: Posting picture files Lisi Reisz <lisi.reisz@gmail.com> - 2016-05-01 13:40 +0200
    Sorry. :-( Re: Posting picture files Lisi Reisz <lisi.reisz@gmail.com> - 2016-05-01 13:50 +0200
      Re: Sorry. :-( Re: Posting picture files Gary Roach <gary719_list1@verizon.net> - 2016-05-01 19:00 +0200
        Re: Sorry. :-( Re: Posting picture files Lisi Reisz <lisi.reisz@gmail.com> - 2016-05-01 19:40 +0200
          Re: Sorry. :-( Re: Posting picture files Gary Roach <gary719_list1@verizon.net> - 2016-05-02 03:40 +0200
        Re: Sorry. :-( Re: Posting picture files Sven Arvidsson <sa@whiz.se> - 2016-05-01 21:20 +0200
        Re: Sorry. :-( Re: Posting picture files <tomas@tuxteam.de> - 2016-05-02 08:50 +0200
          Re: Sorry. :-( Re: Posting picture files Gary Roach <gary719_list1@verizon.net> - 2016-05-02 09:30 +0200
          Re: Sorry. :-( Re: Posting picture files Brian <ad44@cityscape.co.uk> - 2016-05-02 13:00 +0200
  Re: Posting picture files Siard <shiems146@kpnplanet.nl> - 2016-05-01 20:40 +0200

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