How does GPS work and how good are Garmin GPS Units?
We use the term GPS is used a multiple times a day especially while driving. Doesn’t it help you to find your route to your destination? However, do you know what it exactly is? You should because it is of great importance!
Garmin GPS – Global Positioning System
Global Positioning System is a navigation system based on satellites. Owned by the United States government, originally named NAVSTAR. It comprises of a minimum of 24 satellites and the best part about Global Positioning System is that it can function anywhere in all geographical locations round the clock without incurring any setup cost or subscription fee.
There are presently 31 satellites that comprise the GPS and they are circling the earth at a height of 12,000 miles above the ground. Their speed is around 7,000 miles an hour. The satellites are always on the move and are able to complete 2 orbits is a time span of less than 24 hours. There are little rocket boosters that help each satellite in moving on the right path.
The working of Garmin GPS
GPS satellites circle the earth twice a day. Every satellite sends signals and parameters that let GPS devices find out the accurate location of the satellite and the GPS receivers use this information to calculate the exact location of the user. It is the receiver that electronically displays the position of the user to find a route to go back home, a new adventure spot or the distance the user has been running for.
A GPS receiver get signals from 4 or more satellites to get the user’s 3D position and based on time and geographic location a GPS receiver tracks 8 or more satellites. Some GPS devices can be simply worn as a wrist watch
How good is the precision of Garmin GPS?
The GPS receivers in the current times are very accurate. Garmin GPS receivers quickly locks onto satellites when switched on however, there can be a negative effect on the accuracy of the receivers because of atmospheric factors. The accuracy of Garmin GPS receivers is more or less within 10 meters but, with WAAS (Wide Area Augmentation System), some Garmin GPS receivers have a better accuracy (more or less 3 meters) and this feature comes with no additional cost.
You can get even better accuracy with Differential GPS (DGPS) because It corrects GPS distances within 1 to 3 meters on an average. U.S. Coast Guard operates the DGPS correction service, so when they get GPS signals, they correct them and transmit them with beacon transmitters, however to be able to receive a corrected signal, you as a user must have a differential beacon receiver and a beacon antenna along with your GPS device.
Systems similar to Garmin GPS
The world has other systems that are similar to the US-owned GPS. Russians built and use GLONASS system, whereas China’s system named BeiDou is under processing and so is European Space Agency’s Galileo.
Garmin GPS receivers tracks GPS, GLONASS and BeiDou. In other words, the more satellites your device tracks, the better will be the accuracy of your result. With the latest Garmin products, you can track up to 20 satellites!
Keep your Garmin GPS unit Updated
Now that you know how important it is to keep your GPS unit updated. Therefore it is important to check for a Garmin GPS Map Update from time to time. So, this job is an easy one and it won’t take much time.
1. You need to install the Garmin express software on your PC.
2. Simply remove your Garmin device from your automobile and plug it into your PC.
3. On the Garmin express software interface, click add device and find your GPS unit. You can now install the Garmin GPS Map Update available.
Make use of this awesome technology to navigate.