The Global Positioning System (GPS) is a global navigation satellite system (GNSS) developed by the United States Department of Defense and managed by the United States Air Force 50th Space Wing. It is the only fully functional GNSS in the world, can be used freely by anyone, anywhere, and is often used by civilians for navigation purposes. It uses a constellation of between 24 and 32 medium Earth orbit satellites that transmit precise radiowave signals, which allow GPS receivers to determine their current location, the time, and their velocity. Its official name is NAVSTAR GPS.

Since it became fully operational on April 27, 1995, GPS has become a widely used aid to navigation worldwide, and a useful tool for map-making, land surveying, commerce, scientific uses, tracking and surveillance, and hobbies such as geocaching. Also, the precise time reference is used in many applications including the scientific study of earthquakes and as a required time synchronization method for cellular network protocols such as the IS-95 standard for CDMA.

QUICK GPS - What is it? Why do you need it?

Quick GPS is software that is loaded on most HTC devices that have built-in GPS capability. QuickGPS is not a GPS program. It is program that acquires data via the internet (either by WiFi or other data connection) that provides the information that the GPS program needs about the GPS satellites that are in orbit on the NAVSTAR GPS system. Each satellite transmits data called ephemeral data that describes its orbit, its clocktime, and the frequency channel that it broadcasts on. If that data has been downloaded in advance using QuickGPS, it makes the first GPS position obtained when the GPS program is activated much quicker, because all of the ephemeral data does not have to be downloaded from each satellite that is being used to determine the position. If QuickGPS is not used, the first position fix could take 30 minutes or more. On some devices much more than 30 minutes is required. With QuickGPS working and being updated regularly, (a minimum of each 6 days and 23 hours), GPS works quickly and efficiently.


FREE GPS Software For Windows Mobile Devices

Author	Product Name	Description
Google	Google Maps	Locate nearby businesses and services, Get Directions, Track you position on GPS enabled phones - requires unlimited data package because maps are not loaded on PPC they are downloaded in segments from internet.
Microsoft	Bing Live Search For Mobile	Get interactive maps with turn-by-turn driving directions. Help save time with maps that show current traffic conditions. On foot? Get point-to-point walking directions.2

GPS Software For Windows Mobile Devices (software must be purchased)

Author	Product Name	Description
Garmin	Garmin Mobile XT	Compatible with the latest GPS-enabled smartphones and Palm Treo, Samsung Blackjack, Motorola Q, T-Mobile Dash and more.
Pharos	Ostia	Complete GPS software package for GPS enabled PPCs. Provides turn-by-turn verbal driving directions. Maps are loaded from CD-ROM to storage card or you can buy it on a storage card with program and maps preloaded.
ALK	CoPilot Live 7	With its redesigned step-by-step address entry, new clear and colorful 2D and 3D map views, navigation based services like real-time traffic, finding the way to your destination has never been easier or more convenient. Just enter your destination and GO!
GPS Tuner	GPS Tuner 6 Full	GPS Tuner 6 is designed specifically for off-road use: its large buttons, selectable tool window size, 6 different types of Compass views and the built-in Tele Atlas map makes it extremely user-friendly and reliable....
iGuidance	2009 Pocket PC Edition	Several reviewers have rated this software the best of all GPS programs available.
iGO	iGO My way 8 Europe	GPS Navigation Software for Windows Mobile™ based PDA devices and Smartphones
TomTom	NAVIGATOR 6	Easy to install and use, Detailed maps of the US and Canada, Clear and accurate spoken and visual instructions, Easy call handling, Navigate directly to contacts stored in your address book
OnCourse	Navigator 8	USA & Canada Software w/ 2,4 or 8GB microSDHC with miniSD & SD adapters
WorldNav	Premium software for Pocket PC	TeleType GPS Deluxe software for Pocket PCs offering which includes 12+ million POIs, and the latest maps for the 50 U.S. states. Receive the software pre-installed on 4 Gig Secure Digital SD Card
PocketMap	Navigator	an easy-to-use, state-of-the-art GPS navigation solution for your mobile device
TeleNav GPS Navigator	GPS Navigator	AT&T provided (for a monthly fee) subscription GPS software - Unlimited Data Plan Required for use.
CreationPal	Sportypal	SportyPal - GPS tracking/mapping application, if your workouts are based around running, biking, rollerblading or otherwise moving yourself from on place to another. It plots your journey on a Google Map, and gives you a rundown of distance traveled, calories burned and speed sustained. The app is free and fairly easy to use, as is the accompanying site, which you'll need to register for. Compatible with almost every GPS-enabled smartphone,
www.myHairyDog.com	iSpeed	A speed limiter to help reduce speeding fines. Select a speed limit and receive an audible and visible warning when it's exceeded. Very handy if you know there are speed cameras around and you don't have a speed limiter in your car!
serialio.com	SerialMagic	Has built-in GPS support. Use to capture GPS readings so spreadsheet, measure distances and inject them with keystokes to any application, use Mobile Ordering to locate customers when barcode is scanned.

Need Info More About GPS Receiver's?

http://en.wikipedia.org/wiki/Global_Positioning_System