Huh. Thanks for tossing out the link. I
had no idea this was the anniversary of its implementation.
Brian
Team A.I.
From:
az-geocaching-bounces@listserv.azgeocaching.com
[mailto:az-geocaching-bounces@listserv.azgeocaching.com] On Behalf Of Matthew Shapiro
Sent: Wednesday, February 14, 2007
11:45 AM
To:
az-geocaching@listserv.azgeocaching.com
Subject: [Az-Geocaching] Happy
Birthday GPS.
Thought you all would like to read this...
To give credit where credit is due, I found it here...
http://www.wired.com/news/technology/0,72646-0.html?tw=rss.index
Feb. 14, 1989: GPS Enters Orbit
By Tony Long| Also by this reporter
02:00 AM Feb, 14, 2007
1989: The first of 24 satellites that will comprise the global positioning
system is put into orbit.
GPS revolutionized navigation, both at sea and on land, by providing position
reports with unprecedented, pinpoint accuracy. Each satellite is placed in a
specific orbit at a specific altitude to ensure that four or five satellites
are always within range from any point on the planet. A GPS receiver picks up
signals from the satellites and trilaterates the data to fix the position.
This satellite system is so valuable -- besides navigation, GPS has
applications in map-making, land surveying and the accurate telling of time --
that even though it was developed and is maintained by the U.S. Department of
Defense, it is made available without charge to anyone, anywhere on Earth.
Although GPS has eliminated the need for determining a ship's position by
shooting the sun or stars, no sailor worthy of the name would put to sea, even
now, without the ability to use a sextant. Electronic navigation devices fail
and even GPS isn't immune to the odd glitch, and the open ocean is a lonely
place to be if you don't know where you are.
(Source: Peter H. Dana, The Geographer's Craft Project; Wikipedia)
--
Sincerely,
Matthew A. Shapiro
Multi-Systems, Inc
http://msisolutions.com/
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