The problems with GPS units

I'm sure almost everyone on the planet, or GPS has now heard from the Global Positioning System. But how many people really know how they work? This is a brief summary of how GPS works.

Satellites

GPS systems via a network of more than 50 satellites covering the globe, and then the GPS system to work. Locate the position of a signal at least three GPS satellites can receive the signaltransmitted. Then, these satellites will be confronted, so to speak, and then triangulates the position.

A GPS device to send the message with a time of transmitting a radio signal via satellite to the head. The satellites that receive this signal, compare the time the signal was sent at the time of atomic clocks. From there you will have to determine the time for them to receive the signal, then comparing the level ofThe time for each satellite, the signal with their positions and this information can be almost to the path that the signal received their origin.

Possible problems with GPS

I am sure that you suspect the accuracy of the GPS unit is a signal depending on the time left in the group sends. If the weather is off the GPS device can affect the accuracy of the positioning information. Clock errornot the number one source of inaccurate information into GPS devices. a number of incorrect information coming from the atmosphere. When the signal passes through the atmosphere for satellites, one can encounter conditions that accelerate or slow down, affecting the time and calculations are given.

Inaccuracies occur when a signal bounces off a skyscraper, the mountains, or other reasons like that. This will cause distortions that are similarthose caused by weather conditions. Another problem occurs when updating its position via satellite, this is done every twelve minutes. If a signal is a satellite comes close to its update time, the satellite do not know the correct position, and makes a calculation based on misinformation. This type of error is inevitable with GPS systems that are sold to consumers. However, for most applications, these problems are not a lot.

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