gps |
||
device gps tag |
tomtom gps receiverThe GPS or Global Positioning System is a global navigation system used for military and civilian applications alike.
Hand-held GPS units are often used by hikers and mountain climbers to plot their courses and to accurately reflect exactly where they are. The author once used GPS to organize a helicopter evacuation of an injured motorcycle rider in a remote region of the La Sal mountains in Utah. A reading was taken, coordinates given, and the pilot was able to find us with ease. 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. 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 receivers calculate their current position (latitude, longitude, elevation), and the precise time, using the process of trilateration after measuring the distance to at least four satellites by comparing the satellites' coded time signal transmissions. Selective Availablity typically added signal errors of up to about 10 m horizontally and 30 m vertically. The inaccuracy of the civilian signal was deliberately encoded so as not to change very quickly, for instance the entire eastern US area might read 30 m off, but 30 m off everywhere and in the same direction. In order to improve the usefulness of GPS for civilian navigation, Differential GPS was used by many civilian GPS receivers to greatly improve accuracy. 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. When it was first deployed, GPS included a feature called Selective Availability (or SA) that introduced intentional errors of up to a hundred meters into the publicly available navigation signals, making it difficult to use for guiding long range missiles to precise targets. Additional accuracy was available in the signal, but in an encrypted form that was only available to the United States military, its allies and a few others, mostly government users. The GPS system uses a satellite constellation of 24 satellites in intermediate circular orbits. The orbits are designed so at least four satellites are always within line of sight from almost any place on earth. The constellation also includes three spare satellites in orbit. 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 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. GPS is short for (the) Global Positioning System, a satellite navigation system developed by the US Department of Defense. A fleet of more than two dozen GPS satellites broadcasts precise timing signals to GPS receivers, allowing them to accurately determine location anywhere on Earth. In practice, this means that using a GPS device, you can find out where you are in terms of longitude, latitude and altitude. The most recent launch was in September 2005. The oldest GPS satellite still in operation was launched in February 1989. 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.
1. TomTom
GPS solutions for your Car, Motorcycle, PDA and mobile phone - The smart choice in personal navigation. 2. TomTom: Portable GPS Car Navigation Systems Features TomTom's line of portable GPS car navigation systems. 3. Buy Discount TomTom GPS Receivers Online | TomTomGPSdeals.com TomTomGPSdeals.com offers you the lowest prices on highly rated TomTom GPS receivers. Why pay full price at big name retail stores when you can buy your Tom Tom GPS ... 4. tomtom gps receiver items - Get great deals on Electronics ... Buy tomtom gps receiver, Electronics items on eBay. Find great deals on Cell Phones PDAs, eBay Motors items and get what you want now! 5. Communication - GPS Receivers - TomTom Shop Online for TomTom Communication / GPS Receivers 6. Tomtom GPS | GPS Receiver & GPS System Store NZ Buy Tomtom and leading GPS systems cheaper online, latest Tomtom GPS receiver, navigation solutions for car, marine, portable GPS, in-dash navigation 7. Tomtom Gps Receiver-Tomtom Gps Receiver Manufacturers ... Choose quality Tomtom Gps Receiver Manufacturers, Suppliers, Exporters at alibaba.com. ... Home > Showroom > Search : tomtom gps receiver 473 Products ... 8. #: TOMTOM GPS, DISCOUNT NEW TOM TOM GPS ONLINE FOR SALE: Guaranteed low prices tomtom gps and accessories online for sale and ... Garmin n?vi 3790T - GPS receiver - automotive. Garmin Edge 705 Cycle Computer w/ Heart ... 9. TomTom GPS Receivers And Accessories TomTom GPS Receivers And Accessories. TomTom automotive GPS receivers and TomTom accessories. This starts the listing for TomTom GPS Receivers And Accessories. 10. tomtom go 910 gps receiver - tomtom go 910 gps receiver ... tomtom go 910 gps receiver product listings on Alibaba.com - Choose quality tomtom go 910 gps receiver products from large database of tomtom go 910 ... 11. TomTom ONE Car GPS Receiver Product Reviews and Price ... Epinions.com - Compare prices on TomTom ONE Car GPS Receiver - GPS Devices. Compare prices from across the web and read product reviews on TomTom ONE Car GPS Receiver 12. TomTom ONE 3rd Edition - GPS receiver - 3.5-inch Touchscreen ... Open Box Introducing TomTom's ONE 3rd edition, a fast and lightweight 3.5 inch touchscreen portable GPS vehicle navigator preloaded with maps of the United States and ... 13. TomTom GPS Devices Product Reviews and Prices - Epinions.com Epinions.com - Find TomTom GPS Devices by Selectable Software/Maps: Puerto Rico, North America Maps, Australia Maps, Great Britain, Western Europe Maps, City ... 14. How to Buy a TomTom GPS Receiver | eHow.com There are many different types and brands of GPS receivers... Drivers should choose a GPS receiver designed for car navigation like the TomTom GO series. ... 15. Tomtom GPS - GPS Systems - Compare Prices, Reviews and Buy at ... ... Lifetime Map & Traffic Updates, TOMTOM XXL 530S 5-Inch Widescreen Portable GPS Navigator, TOMTOM 130 GPS 3.5 Touch Screen Display, TOMTOM XXL 550TM Automobile Portable ... 16. GPS | Garmin | Magellan | TomTom | Systems | Receiver GPS units and systems by Garmin, Magellan, TomTom and more. Use IneedaGPS.com to find the lowest prices on all these plus accessories. 17. Tomtom Navigator 5 GPS - Compare Prices, Reviews and Buy at ... ... inch Auto Nav Portable GPS N, TOMTOM 140-S 3.5-INCH Portable GPS Navigator, TOMTOM XXL 540S GPS (1EP0.052.01), TOMTOM XXL 530S 5-Inch Widescreen Portable GPS ... 18. Automotive / Car GPS - TomTom TomTom ONE 130's distinctive design puts a full-size touchscreen and the power of GPS in ... The TomTom GO 730 Color 4.3" display GPS Navigation System with ... 19. Garmin Marine Gps Receivers - Tomtom GPS: Compare Prices ... Yahoo! Shopping is the best place to comparison shop for Tomtom GPS. Compare products, compare prices, read reviews and merchant ratings. 20. TomTom ONE XL - TomTom ONE XL Today, when people talk about "GPS," they a normally referring to a specific GPS receiver. 21. TomTom items - Get great deals on Electronics, Cell Phones ... Buy TomTom, Electronics items on eBay. Find great deals on Cell Phones PDAs, Music items and get what you want now! ... TomTom ONE 125 SE GPS Receiver ... 22. TomTom ONE GPS Navigation System Portable GPS Systems ... TomTom ONE GPS Navigation System Portable GPS Systems & Receivers. ONE Vehicle Navigation Systems with Preloaded Maps and Touchscreen Color LCD ... 23. Tomtom GPS Receiver I have just been playing with my new Tomtom GPS receiver and boy, am I impressed. First off the Tomtom was simple to use right from the box.All I ... 24. TomTom, portable GPS car navigation systems GPS solutions for your Car, Motorcycle, PDA and mobile phone - The smart choice in personal navigation. 25. TomTom GO 630 - GPS receiver Car GPS (Navigation) reviews ... User Rating: 4.5/5 from 3 users; TomTom Go 630 Review Pros: Lots of features, many of which aren't available on most other GPS navigation systems. My full review is ... 26. Compare TomTom GPS-Receivers Prices - PriceRunner United Kingdom Compare prices on TomTom GPS-Receivers among retailers, read user and expert reviews and use our easy price comparison to help you find the best deal online at PriceRunner 27. TomTom Wireless GPS Receiver Reviews - alaTest USA Read 68 reviews and find the lowest price for the TomTom Wireless GPS Receiver. Overall, this GPS is rated 69/100 (Good) 28. Tomtom One XL GPS Receiver Problems by FixYa Free tech support for Tomtom One XL GPS Receiver and help with Tomtom One XL GPS Receiver installation, troubleshooting, repairs and upgrades 29. Best Buy TomTom GPS Navigation Systems Best buy TomTom GPS Navigation Systems-TomTom ONE XL ... a GPS system, your chance of getting lost is signifcantly reduced thanks to that little GPS receiver that ... 30. Order @ GPS Central - TomTom Bluetooth GPS Receiver, 9T00.001 Buy TomTom Bluetooth GPS Receiver - small, lightweight, integrated SiRF Star III with 20 channel tracking. Compatible with cell phone, PDA - HP, Sony, ... 31. Best TomTom GPS Devices Wize has read thousands of GPS Device reviews from sites like Amazon, Sears, and Walmart. Read reviews on the most popular TomTom GPS Devices brands ... 32. Compare TomTom GPS Ratings & Recommendations | TomTom GPS ... Top Sports & Fitness GPS. GPS Compare TomTom Models. Model. Wide Screen. Voice Recog ... TomTom LIVE Services Receiver Included. North America (U.S., Canada, ... 33. Tomtom TomTom GO 720 GPS Receiver - Reviews & Prices @ Yahoo! ... Yahoo! Shopping is the best place to comparison shop for Tomtom Go 720 Gps Receiver. Compare products, compare prices, read reviews and merchant ratings... 34. Tomtom Xl 350m Gps Receiver in GPS - Pronto Tech Shop for tomtom xl 350m gps receiver in GPS on Pronto Tech. Find and compare prices on tomtom xl 350m gps receiver from popular brands and stores all in one place. 35. TOMTOM GPS Receiver Mounting Kit | Overstock.com Buy TOMTOM GPS Receiver Mounting Kit at the lowest price, guaranteed! $2.95 shipping and product reviews on all products. } ?>
tomtom gps receiver online resources. |
|