Atomic clocks on the GPS satellites are set to "GPS time", which is the number of seconds since 00:00:00 UTC, January 6, 1980. UTC is short for Coordinated Universal Time. Today, GPS time is 14 seconds ahead of UTC, because it does not follow leap seconds. That's why new GPS units initially show the incorrect time after achieving a GPS lock for the first time. However, this is usually corrected on the display within 15 minutes once the UTC offset message is received for the first time.
GPS has become a vital global utility, indispensable for modern navigation on land, sea, and air around the world, as well as an important tool for map-making, and land surveying. GPS also provides an extremely precise time reference, required for telecommunications and some scientific research, including the study of earthquakes.
Because GPS is as much an accurate time keeper as a locator, one of the most common applications for GPS units is as a reference clock for time code generators or NTP clocks. For instance, when monitoring earthquakes, each seismic sensor can be synched with the GPS system to provide a synchronized, precise time source for measurements.
The author would have loved to have used GPS years ago in college. We had a class where we used maps and compasses. We were given precise coordinates and had to plot a course through woods and streams and swamps to find and sign in at specific latitude and longitude coordinates. Today, this sport, now called "geocaching", is a popular activity, particularly for outdoor hiking enthusiasts.
In late 2005, the US government introduced the first in a series of new generation GPS staellites offering new capabilities. Chief among these is a second civilian GPS signal called L2C for greater accuracy and reliability.
The first experimental Block-I GPS satellite was launched in February 1978. The GPS satellites were initially manufactured by Rockwell International and now manufactured by Lockheed Martin.
In 1996, President Bill Clinton issued a policy directive declaring GPS to be a dual-use system, meaning that it could be made avilable for a wide range of civilian and military purposes.
More accurate GPS receivers are used these days in surveying to accurately locate boundaries, structures and so on.
The United States Department of Defense developed the system, officially named NAVSTAR GPS (Navigation Signal Timing and Ranging GPS), and the satellites are managed by the 50th Space Wing at Schriever Air Force Base. Although the cost of maintaining the system is significant, GPS is available for free use in civilian and commercial applications.
GPS allows the military to accurately target its missile arsenal, largely composed of cruise missiles and precision-guided munitions. This was born out by the use of SOFLAM (Special Operations Forces Laser Acquisition Markers) targeting during the attacks on Tora Bora in Afghanistan. It also improves the accuracy of the US submarine launched ballistic missiles by providing precise locational information to the submarine commanders. Finally, command and control over troops is improved because commanders know precisely where their troops and the enemy are located on the battlefield.
GPS receivers come in a variety of consumer formats, and today can be found in cars, watches, phones boats and planes. Major manufacturers include Trimble, Garmin and Leica, low-end, hand-held consumer units are often available at less than $100 per unit.
Commercial civilian GPS receivers are purposefully less accurate than they might be. In specific, they are required to have limits on the velocities and altitudes at which they will report coordinates in order to prevent them from being used to create improvised missiles.
One of biggest problems for GPS accuracy is that changing atmospheric conditions change the speed of the GPS signals unpredictably as they pass through the ionosphere. The effect is minimized when the satellite is directly overhead and becomes greater toward the horizon, as the satellite signals must travel through the greater "thickness" of the ionosphere as the angle increases. Once the receiver's rough location is known, an internal mathematical model can be used to estimate and correct for the error.
In 1998, Vice President Al Gore announced plans to upgrade GPS with two new civilian signals for enhanced user accuracy and reliability, particularly with respect to aviation safety.
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Navigation with Palm OSAll you wanted to know about palm OS navigation with emphasis on gps ... There is also a listing of non-gps aware navigation software products as well. ...
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Calorie GPS for Palm OS by RNS::It will work together with a GPS receiver connected to your Palm. ... Palm OS. Palm OS 3.5 90K of available RAM. Centro. Treo 180. Treo 270. Treo 300. Treo 600. Treo ...
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RNS:: Speedometer GPS Software for Palm OSThe official web site of RNS:: Speedometer GPS for Palm OS - Auxiliary speedometer and odometer for your car with GPS satellite precision.
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Buy Palm Phones and Accessories : Palm Store USAShop the latest Palm phones and accessories at the Palm Store. ... to GPS. Within wireless coverage area only. 9. Estimate subject to change based on system software and ...
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Palm OS Software for navigationAll you wanted to know about palm, visor, clie, handera, and others using navigation software
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IntelliGolf Eagle GPS Option / Palm OS 9.25 Software for Palm ...IntelliGolf Eagle GPS Option / Palm OS - Palm PDA shareware and freeware software. Games, e-books, multimedia, ringtones, sport,utilities for Palm smartphones.
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DeLorme Street Atlas USA 2006 Handheld GPS Software for Palm ...Complaints of buggy software, and slow routing are common. ... not aware of any Palm OS or Windows CE phones that support USB connections to GPS devices, so your USB ...
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RNS:: - Software for Palm OSShareware and freeware Palm OS products created by RNS: ... GPS Software. Shareware: Calorie GPS - Track your caloric consumption during your everyday activities or sports! ...
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Palm Os " GPS NEWS and REVIEWPosted in GPS SOFTWARE, GPS SYSTEM, Palm Os, WINDOWS on March 2 2006 ... Released a new software update (5.1.2) of TomTom Navigato 5 for Palm OS. This new version ...
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Calorie GPS for Palm OS by RNS::It will work together with a GPS receiver connected to your Palm. ... Palm OS. Palm OS 3.5 90K of available RAM. Treo 180. Treo 270. Treo 300. Treo 600. Treo 650 ...
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PDA Games and SoftwareFreeware, shareware and commercial software for Palm OS, Windows CE, Pocket PC, RIM, and EPOC arranged in categories.
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GPSPilotGPS Pilot mapping software for Palm OS and Windows Mobile Pocket PC platforms. Convert PDAs and smartphones to worldwide navigation assistants. ...
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Palm Entertainment software - Palm SoftwareDownload Entertainment software for Palm, Entertainment - Palm Software. Get Entertainment Palm freeware, shareware and commercial software for your Palm mobile device.
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Palm Software Download - pdassi.de - Die große Software-Welt ...Palm Software Download, herunterladen direkt vom Web zum Palm
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IntelliGolf Eagle GPS Option for Palm OSAdd the GPS Option to your existing IntelliGolf Birdie edition software today! ... Enter Email SIGN UP. All Software / IntelliGolf Eagle GPS Option for Palm OS. IntelliGolf ...
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18. Palm Software - Palm OS - Releases | Treonauts
New and updated Palm Software for all Palm OS PDAs and smartphones including the Treo and Centro range.
19. PathAway 3.0 GPS Navigation and Mapping Software - PalmOS ...
Review of PathAway 3.0 GPS Navigation and Mapping Software - in Kickstartnews - highly functional Palm OS program for accessing standard GPS devices.
20. treocentral.com >> Stories >> Software >> RNS:: Speedometer ...
RNS:: Speedometer GPS is the first GPS speedometer for Palm OS. ... Being compatible with all Palm OS devices version 4 or higher and working with ...
21. Garmin: Garmin Mobile XT for Palm OS with GPS 10x twg Updates ...
Garmin Mobile XT for Palm OS with GPS 10x twg Updates & Downloads ... If this software is uploaded to a GPS unit other than the product it is designed for, it ...
22. MarcoSoft
Specialist in cross-platform custom software development for Mac OS Windows Palm Pilot.
23. Free GPS Software for Mobile and Other
A complete, up-to-date source for free GPS software for Java, Symbian, Palm, BlackBerry, iPhone, Psion and more
24. Head-to-Head Review of Navigation Software for Palm OS
As many people get ready to travel during this holiday season, Brighthand forum moderator Magellan has a review comparing three Palm OS applications that provide GPS ...
25. Download PathAway GPS (Palm OS 3.0-3.3) 2.1 Free Trial - GPS ...
Download PathAway GPS (Palm OS 3.0-3.3) 2.1 Free Trial - GPS Navigation and Mapping Software
26. Garmin: Garmin Mobile XT for Palm OS with GPS 20 Updates ...
Garmin Mobile XT for Palm OS with GPS 20 Updates & Downloads ... If this software is uploaded to a GPS unit other than the product it is designed for, it will render the unit ...
27. Download PathAway GPS (Palm OS 3.5-5.x) 3.0 Free Trial - GPS ...
Download PathAway GPS (Palm OS 3.5-5.x) 3.0 Free Trial - GPS Navigation and Mapping Software
28. Palm OS programs: Softonic
Download Palm OS programs from Softonic. Free software downloads
29. SoftLow.com - Download Maps Travel Software for Palm OS
Softlow.com - Download Maps Travel Software for Palm OS: map, maps, streets, street, search, gps, available, city
30. New GPS for Palm OS handhelds
Navman 4460 Bluetooth GPS launched for Palm OS 5 PDAs, boasting hi-res compatibility and voice navigation in car or on foot.
31. Freeware Palm: Cetus GPS v1.1
Freeware Palm: daily updated site for freeware files on Palm
32. Quick guide to handheld operating systems - CNET Reviews
In this CNET quick guide, we take a look at the functionality and applications of the four main handheld operating systems--Palm, Windows Mobile, Symbian, and ...
33. Excellent GPS hardware + software package, with a few small ...
Review Summary: Consider buying this as an inexpensive, highly portable alternative to a stand-alone dedicated GPS for your car if you have a Palm or Pocket PC PDA. ...
34. Mobile - Free mobile software downloads and software reviews ...
Find the mobile software you're looking for at CNET Download.com, the most comprehensive source for free-to-try mobile software downloads on the Web.
35. Review: Navman 4470 GPS for Palm OS 5 at bioneural.net
By Bruce McKenzie. March 13th, 2005. Tags: bluetooth, Gadgets, gps, navman, New Zealand, palm, pda, software, tomtom. bioneural.net is for stuff worth sharing
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