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Author Topic: How GPS works  (Read 9608 times)

Offline Bored chemist

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« Reply #25 on: 20/11/2011 09:53:12 »
What does a GSP guided missile do if it can't establish its position?
If, as I rather hope, it self destructs, then a jammer would do the job of keeping you safe anyway.

"I wonder if that's why certain other countries are creating alternative GPS systems?"
No, with 2 systems  you get better data and less chance of failure.
At the moment the US govt can shut down GPS and it's too useful to let them have that veto.
We want to have our own so we can spend government money on a big project that keeps scientists + engineers off the dole.
Most importantly, it annoys the Americans.
http://en.wikipedia.org/wiki/Galileo_(satellite_navigation)#Tension_with_the_United_States
 

Offline Geezer

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« Reply #26 on: 21/11/2011 07:00:04 »
Seems like a lot trouble to go to just to annoy Americans.
 

Offline imatfaal

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« Reply #27 on: 21/11/2011 10:29:18 »
Seems like a lot trouble to go to just to annoy Americans.
We like to make the effort and be sure things are done properly
 

Offline Geezer

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« Reply #28 on: 21/11/2011 18:56:57 »
Seems like a lot trouble to go to just to annoy Americans.
We like to make the effort and be sure things are done properly

One advantage of being an expat is that I can pretend the old country is pretty much the same pleasant place that it was in my youth, i.e., prior to it being taken over by a bunch of raving loonies.

The weather was a lot better then too.
 

Offline CliffordK

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« Reply #29 on: 21/11/2011 20:59:44 »
All you need to do is get enough of the sats to fib about their positions, and that should pretty much take care of it, although it might be possible to fool a receiver with some "synthetic" satellites.

I wonder if that's why certain other countries are creating alternative GPS systems?
Perhaps half of World War III will be fought in space.
Leaving so much orbital debris, that it will set future space programs back a thousand years!!!
 

Offline imatfaal

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« Reply #30 on: 22/11/2011 11:48:52 »
Seems like a lot trouble to go to just to annoy Americans.
We like to make the effort and be sure things are done properly

One advantage of being an expat is that I can pretend the old country is pretty much the same pleasant place that it was in my youth, i.e., prior to it being taken over by a bunch of raving loonies.

The weather was a lot better then too.
You also get to double dip on celebrations - hogmanay and thanksgiving
 

Offline Geezer

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« Reply #31 on: 22/11/2011 19:04:18 »
It's not unusual for people to ask if there are firework displays on the 4th of July in Britain too.
 

Offline imatfaal

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« Reply #32 on: 23/11/2011 11:09:48 »
It's not unusual for people to ask if there are firework displays on the 4th of July in Britain too.
what we don't tell the americans is that we celebrate the occasion as much, if not more, than they do
 

Offline nicephotog

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« Reply #33 on: 04/12/2011 03:15:28 »
Quote
I wonder if that's why certain other countries are creating alternative GPS systems?

Sundials clocks and smoke signals??? amigo!!!
 

Offline CliffordK

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« Reply #34 on: 04/12/2011 04:38:02 »
It's not unusual for people to ask if there are firework displays on the 4th of July in Britain too.
what we don't tell the americans is that we celebrate the occasion as much, if not more, than they do
Oh...
The "Good Riddance of the Pesky Americans" Holiday?
 

Offline Bored chemist

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« Reply #35 on: 04/12/2011 11:18:39 »
It's not unusual for people to ask if there are firework displays on the 4th of July in Britain too.
what we don't tell the americans is that we celebrate the occasion as much, if not more, than they do
Oh...
The "Good Riddance of the Pesky Americans" Holiday?
That's the one. It's also what we give thanks for at Thanksgiving.
 

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How GPS works
« Reply #35 on: 04/12/2011 11:18:39 »

 

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