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.
| GPS Navigation System Articles>> |
Telematics and GPS Navigation
Telematics and vehicle fleet tracking and related tracking systems
by admin
2 Jan 2010 at 3:01am
This article is about different GPS navigations systems that are available in the market today...
by admin
25 Apr 2007 at 2:14am
This article goes over some of the problems that are inherent in GPS navigation systems in cities with fast growth...
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| Outbound Message - Message from NOC to Communicator
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Device - a specific piece of hardware which is owned by an organization; typically concerning communication devices (e.g. GPS antennae, etc.)
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Yahoo! News Search Results for gps navigation system
Yahoo! News Search Results for gps navigation system
18 Mar 2010 at 9:28pm
Navman Wireless today introduces the latest version of its GPS navigation and messaging device, the M-Nav 760. Developed for business users, the M-Nav 760 provides fully integrated vehicle tracking...
17 Mar 2010 at 8:20pm
by Staff Writers Madrid, Spain (SPX) Mar 18, 2010 GMV was selected by Putrajaya Corporation to supply a new fleet control system for the city of Putrajaya, Malaysia.
17 Mar 2010 at 1:08pm
The research and development labs of General Motors have been working closely with several universities, including Carnegie Mellon University and the University of Southern California , to build an...
15 Mar 2010 at 7:02am
LONDON----Trafficmaster?s Smartnav satellite navigation is the first Pay As You Go navigation application on the smart phone market, allowing users to only pay for satnav directions and traffic inf...
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