Global Positioning Systems and Applications
(from wikipedia) The primary military purpose is to allow improved command
and control of forces through an enhanced ability to accurately specify
target locations for cruise
missiles or troops. The satellites
also carry nuclear detonation detectors, which form a major portion of the United
States Nuclear Detonation Detection System.
The system is used by countless civilians as well, who can use the
GPS's Standard Positioning Service worldwide free of charge. Low
cost GPS receivers (price $100 to $200) are widely available, combined
in a bundle with a PDA or car computer.The system is used as a navigation
aid in aeroplanes, ships and cars. The system can be used by computer
controlled harvesters, mine trucks and other vehicles. Hand held
devices are used by mountain climbers and hikers. Glider pilots use
the logged signal to verify their arrival at turnpoints in competitions.
On May 1, 2000, US President Bill Clinton announced that this "Selective
Availability" would be turned off. However, for military
purposes, "Selective Deniability" may still be
used to, in effect, jam civilian GPS units in a war zone or global
alert while still allowing military units to have full functionality.
European concern about this and commercial issues has resulted
in the planned GALILEO positioning system. Russia already operates
an independent system called GLONASS (global navigation system),
although with only 12 active satellites as of 2004 the system is
of limited usefulness.
Military (and selected civilian) users still enjoy some technical
advantages which can give quicker satellite lock and increased accuracy.
The increased accuracy comes mostly from being able to use both the
L1 and L2 frequencies and thus better compensate for the varying
signal delay in the ionosphere (see above). Commercial GPS receivers
are also required to have limits on the velocities and altitudes
at which they will report fix coordinates; this is to prevent them
from being used to create improvised cruise or ballistic missiles.
Many synchronization systems use GPS as a source of accurate time,
hence one of the commonest applications of this use is that of GPS
as a reference clock for time code generators or NTP clocks. For
instance, when deploying sensors (for seismology or other monitoring
application), GPS may be used to provide each recording apparatus
with some precise time source, so that the time of events may be
recorded accurately.
| On-Board Wired Panic Button - QUALCOMM's cab-mounted button used to send panic messages
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Accept/Reject Load Assignment Macro - Macro that allows driver to accept or reject the load assignment
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Yahoo! News Search Results for gps navigation system
Yahoo! News Search Results for gps navigation system
29 Jul 2010 at 9:23pm
by Staff Writers New York NY (SPX) Jul 30, 2010 Augmentra has announced that its award-winning ViewRanger GPS outdoors navigation system is now available as a Smartphone app for the Apple iPhone (3...
30 Jul 2010 at 3:48pm
United States and European Union Announce Collaboration on the Use of Global Navigation Satellite Systems Washington, DC July 30, 2010 The following is a joint statement on cooperation between the ...
29 Jul 2010 at 9:53am
Ford now bases its newest navigation system on an easily removed SD Card that lets you choose to add factory navigation at any time, so long as your car has a built-in color LCD display, called MyF...
30 Jul 2010 at 10:12pm
China will launch its fifth orbiter into space, as part of its satellite navigation and positioning network known as Beidou, or Compass system, in the next few days.
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