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karan
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What is GPS ? - Page 7 Empty Re: What is GPS ?

Mon Jan 14, 2019 7:08 pm
Essentially, the GPS receiver measures the distance to each satellite by the amount of time it takes to receive a transmitted signal.
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karan
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What is GPS ? - Page 7 Empty Re: What is GPS ?

Mon Jan 14, 2019 7:08 pm
With distance measurements from a few more satellites, the receiver can determine a user's position and display it electronically to measure your running route, map a golf course, find a way home or adventure anywhere.
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karan
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What is GPS ? - Page 7 Empty Re: What is GPS ?

Mon Jan 14, 2019 7:08 pm
To calculate your 2-D position (latitude and longitude) and track movement, a GPS receiver must be locked on to the signal of at least 3 satellites.
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karan
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What is GPS ? - Page 7 Empty Re: What is GPS ?

Mon Jan 14, 2019 7:08 pm
With 4 or more satellites in view, the receiver can determine your 3-D position (latitude, longitude and altitude). Generally, a GPS receiver will track 8 or more satellites, but that depends on the time of day and where you are on the earth. Some devices can do all of that from your wrist.
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karan
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What is GPS ? - Page 7 Empty Re: What is GPS ?

Mon Jan 14, 2019 7:09 pm
Once your position has been determined, the GPS unit can calculate other information, such as:
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karan
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What is GPS ? - Page 7 Empty Re: What is GPS ?

Mon Jan 14, 2019 7:09 pm
Today's GPS receivers are extremely accurate, thanks to their parallel multi-channel design.
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karan
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What is GPS ? - Page 7 Empty Re: What is GPS ?

Mon Jan 14, 2019 7:09 pm
Our receivers are quick to lock onto satellites when first turned on.
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karan
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What is GPS ? - Page 7 Empty Re: What is GPS ?

Mon Jan 14, 2019 7:09 pm
They maintain a tracking lock in dense tree-cover or in urban settings with tall buildings.
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karan
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What is GPS ? - Page 7 Empty Re: What is GPS ?

Mon Jan 14, 2019 7:10 pm
Certain atmospheric factors and other error sources can affect the accuracy of GPS receivers.
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karan
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What is GPS ? - Page 7 Empty Re: What is GPS ?

Mon Jan 14, 2019 7:10 pm
Garmin GPS receivers are typically accurate to within 10 meters. Accuracy is even better on the water.
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karan
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What is GPS ? - Page 7 Empty Re: What is GPS ?

Mon Jan 14, 2019 7:10 pm
Some Garmin GPS receiver accuracy is improved with WAAS (Wide Area Augmentation System).
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karan
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What is GPS ? - Page 7 Empty Re: What is GPS ?

Mon Jan 14, 2019 7:10 pm
This capability can improve accuracy to better than 3 meters, by providing corrections to the atmosphere.
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karan
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What is GPS ? - Page 7 Empty Re: What is GPS ?

Mon Jan 14, 2019 7:10 pm
No additional equipment or fees are required to take advantage of WAAS satellites.
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karan
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What is GPS ? - Page 7 Empty Re: What is GPS ?

Mon Jan 14, 2019 7:11 pm
Users can also get better accuracy with Differential GPS (DGPS), which corrects GPS distances to within an average of 1 to 3 meters.
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karan
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What is GPS ? - Page 7 Empty Re: What is GPS ?

Mon Jan 14, 2019 7:11 pm
The U.S. Coast Guard operates the most common DGPS correction service, consisting of a network of towers that receive GPS signals and transmit a corrected signal by beacon transmitters.
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karan
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What is GPS ? - Page 7 Empty Re: What is GPS ?

Mon Jan 14, 2019 7:11 pm
In order to get the corrected signal, users must have a differential beacon receiver and beacon antenna in addition to their GPS.
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karan
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What is GPS ? - Page 7 Empty Re: What is GPS ?

Mon Jan 14, 2019 7:11 pm
There are other similar systems to GPS in the world, which are all classified as the Global Navigation Satellite System (GNSS).
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karan
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What is GPS ? - Page 7 Empty Re: What is GPS ?

Mon Jan 14, 2019 7:11 pm
GLONASS is a satellite constellation system built by Russia.
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karan
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What is GPS ? - Page 7 Empty Re: What is GPS ?

Mon Jan 14, 2019 7:12 pm
he European Space Agency is creating Galileo, while China is creating BeiDou.
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karan
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What is GPS ? - Page 7 Empty Re: What is GPS ?

Mon Jan 14, 2019 7:12 pm
Most Garmin receivers track both GLONASS and GPS, and some even track BeiDou.
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karan
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What is GPS ? - Page 7 Empty Re: What is GPS ?

Mon Jan 14, 2019 7:12 pm
You can expect a more reliable solution when you track more satellites.
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karan
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What is GPS ? - Page 7 Empty Re: What is GPS ?

Mon Jan 14, 2019 7:12 pm
You could be tracking nearly 20 with newer Garmin products.
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karan
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What is GPS ? - Page 7 Empty Re: What is GPS ?

Mon Jan 14, 2019 7:12 pm
The 31 satellites that currently make up the GPS space segment are orbiting the earth about 12,000 miles above us.
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karan
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What is GPS ? - Page 7 Empty Re: What is GPS ?

Mon Jan 14, 2019 7:13 pm
These satellites are constantly moving, making two complete orbits in less than 24 hours.
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karan
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What is GPS ? - Page 7 Empty Re: What is GPS ?

Mon Jan 14, 2019 7:13 pm
They travel at speeds of roughly 7,000 miles an hour. Small rocket boosters keep each satellite flying on the correct path.
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What is GPS ? - Page 7 Empty Re: What is GPS ?

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