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.
| Remote diagnostics - Over-the-air remote reporting of the vehicle's operational data to ensure that maintenance schedules are kept and to warn of potential mechanical problems.
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Accept/Reject Load Assignment Macro - Macro that allows driver to accept or reject the load assignment
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gps navigation system - Yahoo! News Search Results
gps navigation system - Yahoo! News Search Results
19 May 2012 at 12:29am
Washington, May 19 (ANI): Computer engineers at the University of Nevada, Reno, have developed an indoor navigation system for people with visual impairments, which can run on a standard smartphone.
17 May 2012 at 8:55pm
While just about any navigation system on the market will get you where you're going, not all of them are created equally. This is especially true in the world of OEM in-car navigation systems wher...
16 May 2012 at 1:05am
It's not that long ago that GPS capabilities in a mobile phone were considered a standout feature. Today, GPS navigation is standard for smartphones, and as a result, many of us have come to rely o...
18 May 2012 at 11:35am
Indoor navigation system for blind designed by UNR scientists
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