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Just a Guess

@153.31.108.x

GPS

No new news, however, lets no overreact either. You only need two satellites to coordinate a position. Three to triangulate. There are more than 15 satellites with GPS capabilities; not to mention military satellites.

Chicken Little has no place here.


NoVA_CoxUser
Stand back from the cage -- The RF bites
Premium
join:2004-07-06
Alexandria, VA

2 edits

said by Just a Guess :

You only need two satellites to coordinate a position. Three to triangulate.
Actually you need 4 satellites simultaneously in-view to obtain a 3-D GPS fix.

If you program your GPS receiver to assume an altitude (e.g. a boater at sea level) you can obtain a fix w/ only three satellites.

(the device ignores the "other" fix which isn't at the assumed altitude)


Boredness
The Lurker
Premium
join:2005-07-07
In Limbo

reply to Just a Guess
I have no use for GPS whatsoever so I don't care what happens to it.



NoVA_CoxUser
Stand back from the cage -- The RF bites
Premium
join:2004-07-06
Alexandria, VA

Unless you need a precision time source for "something" to operate.

Something like a cell phone. (just one example)

Most -- if not all -- cell phone towers need GPS to provide their precision time sync.

That said, this article only hightlights the potential problem facing all major sets of infrastructure. It's too easy in government funding programs to "cut today and let 'the next guy' fix the problem" ...

... the problem is that the 'next guy' does the same thing.

Eventually 10 years down the road a HUGE bill becomes due and everyone [then] is aghast at the "mis-management" which caused this "huge problem."


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