Table of Contents
Advertisement
MANUAL
About GPS Technology
The Global Positioning System (GPS), developed by the U.S. Department of Defense, is a constellation of 24 satellites that
orbit the Earth twice daily. Each satellite contains an atomic clock that is accurate to the nanosecond, and constantly emitting
radio waves toward Earth.
GPS sensors (hardware devices for receiving data) can receive these signals from the satellites, and using their own internal
clock can calculate the amount of time it has taken for the signal to be received. GPS relies on the fact that radio waves travel
at the speed of light to calculate distances, and the exact location of the sensor is figured by combining the data received from
four satellites.
Using the data from these four satellites, GPS is able to give you the latitude, longitude and elevation of your present location,
and also your road speed and direction of travel on a route. Given the right conditions, a GPS sensor can identify your
geographic position anywhere in the world within a matter of a few meters.
How Gizmondo Navigator Uses GPS
Gizmondo Navigator uses the GPS positional data that it receives from the hardware unit you place on your dashboard to
display your current position on a map as you drive. This is called "tracking". Gizmondo Navigator also uses the GPS data it
receives from the GPS receiver to display your planned route if you enter a destination on your mobile device. Gizmondo
Navigator guides you with audible prompts as you drive as well as on-screen directions.
Tracking will begin automatically when you have satellite reception. In order to get route guidance, you have to enter a
destination on your mobile device. Tracking may also be used without receiving guidance instructions when you're in
Navigating Mode. In this case, you'll see your trip tracked on the map on your mobile device as you drive, but you won't see
a highlighted route on the map and you won't be given driving directions.
GPS Accuracy
The GPS signal Gizmondo Navigator receives from the constellation of satellites has a rated accuracy of within 5 - 10 meters.
This means that 95% of the time the reported location is within 15 - 30 feet of your exact position. Gizmondo Navigator takes
this location information and enhances it further by "snapping" it to our street and highway network. Occasionally, Gizmondo
Navigator will place you on the wrong road. If this occurs, keep driving and Gizmondo Navigator will automatically correct
itself and find your proper position.
At times, Gizmondo Navigator's GPS tracking will be less accurate or fail to work at all because the unit is unable to receive
satellite signals. Heavy foliage, tall buildings, or any other structures obstructing communications will interfere with Gizmondo
Navigator's ability to track your location. Like your car radio, GPS tracking can also be affected by weather conditions if
severe. Gizmondo Navigator will continue tracking as soon as adequate signals are available. Despite these limitations, you
can expect Gizmondo Navigator to provide you with useable and accurate information most of the time. Gizmondo Navigator
will alert you if accurate information is unavailable.
Contacting Gizmondo Customer Support
If you're having difficulty, please visit our web site at www.gizmondo.com or call our free-phone
helpdesk in the UK on 0800 731 1278, which is available Monday to Saturday, between 9am
and 9pm.
-34-
Advertisement
Table of Contents
