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How does a GPS unit work? by Innes Donaldson





How does a GPS unit work? by
Article Posted: 10/07/2014
Article Views: 153
Articles Written: 2883
Word Count: 565
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How does a GPS unit work?


 
Advice,Business,Consumer
How does a GPS unit work?

The GPS navigation unit is all based on precise time measurement. All satellites that are used for GPS positioning and tracking have several atomic clocks on board their systems. It all starts with the satellite transmitting exact time radio signals that your GPS receiver will pick up on. The satellite radio signal delivers precise time to information, giving the GPS receiver exact timing when the satellite sent the signal. The GPS navigation unit onboard database computer uses this measurement of time in transit; at the same time the satellite will send a transmission navigation signal and will tell the GPS software their exact position. With this information in your GPS receiver it will calculate the distance from the satellite and give you your GPS navigation system location on a spherical surface, which is known as (map datums). A GPS device then links to more satellites and will complete the same procedure where the three points meet and show where the GPS navigation unit is positioned. By acquiring a signal from a fourth satellite will just refine your global position.

What to look for and a GPS unit

Signal loss:. Canyons and caves at any tall buildings will hinder your readings. You will be able to minimize this if you use a system that continuously monitors multiple satellites at a time

GPS software: check the GPS software and what if any restrictions it may have. Is it good for mapping, is it economical, will the program lasts for more than a couple years.

GPS power supply: how long will the battery last, GPS units draw a lot of power if left on continuously. Check to see if it has an AC adapter input.

GPS/maps/directions: look at the mapping capability and how it is displayed on your GPS unit. Can you upload old mapping from your PC. Will it work if you travel outside your country? Will this mapping system last several years as markets change rapidly.

GPS and durability: check to see and how water resistant the unit is. Also look at the shockproof design to see how rugged it is. Temperature limits have a big impact on GPS units as they don't work well under extreme temperatures.

GPS navigation can be used in several different areas

There are several different uses that you could use a GPS asset tracking unit. On the road in a car, hiking the wilderness out in the water or even in the air. All of these areas can be sub categorized to more specific uses depending on your specific GPS needs. Looking for a vehicle tracking GPS realize that these units need to have some reasonable accuracy and be reliable. They must contain road maps detailing areas that you want.

Remember the satellite is only used for transmitting and timing of global positioning informational data and don't send actual area maps data, that is up to your GPS navigation unit to calculate. There are portable GPS devices that you can quickly install in the vehicle for the same use. You can always acquire a handheld GPS unit and be portable and on the move anywhere you need to be. One more is the Marine GPS, which uses very specific GPS mapping software programs because it needs to use information differently it also should be water resistant to protect itself.

Related Articles - GPS, GPS Tracking, GPS Tracking Devices,

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