This article is a series of first three articles that can explain some principles and concepts for GPS. In this article I will explain exactly how the GPS works, so it will no longer be a mystery. I also mention the latest developments in the GPS system. In the second article, I explain some of the GPS-based technologies, so if you hear the "Sirf III" magic words, then you will know what people are talking about. And finally, in the third paragraph I briefly review the leading GPS manufacturers in the market.
First, GPS is the global positioning system and usually repeats the GPS receiver. The receiver takes up the signals coming from the constellation of 27 satellites around the Earth (in fact, only 24 satellites work and there are 3 more protections in one of the 24 errors) and can calculate it from these signals. s absolute position on Earth. This satellite system was developed by the US military, and after a while the US government has disclosed it. These satellites circulate on Earth and make two full rotations a day. The GPS receiver places four or more satellites on the signals that the satellites continuously transmit to the Earth, calculating the distances between each satellite and this information calculates the "absolute space on Earth." The process for determining the location of the GPS receiver is based on the mathematical principle that corresponds to trilationation.
Let me explain a bit about this GPS. This is a bit tricky, so if you do not want to deal with the details – just leave this chapter. As I said, the GPS receiver places the satellites and calculates the distance. For example, say the buyer knows Satellite_1 is 20 miles away. Throughout the space Satellite_1 can be anywhere on a huge sphere, 20 miles away from the receiver. If the receiver also knows that Satellite_2 is positioned 30 miles, then the satellite_1's sphere can be overlaid with the satellite_2 sphere. Spheres perfectly cross each other (think in 3 dimensions). The distance from the third satellites provides a third sphere that crosses the circle at two points. One of these points is in space and the other is on Earth. This second point is actually the location of the GPS receiver. Using the fourth sphere, the receiver is able to choose the second point and thus knows the exact location on the ground.
Basically, the GPS receiver has to search for only three satellites, but always tries to find as many satellites as possible, as it improves the accuracy of the result.
Satellite continuous signals are high frequency low-power radio waves that contain information about the satellite and its location The GPS receiver can calculate the distance to the satellite by counting the signal time from the satellite to the receiver. The whole procedure described above works well, but there are many inaccuracies, such as signal interference, weather, and for many reasons – differential GPS (DGPS) helps to correct inaccuracies This patch is based on hosts on Earth. station location and consistently send information to GPS receivers (but only to those in which this technology is implemented) how to improve their performance so that it is more accurate
After the GPS receiver has completed the calculation, "width, length and sea level m this is not a great deal to average users. Therefore, in order to make the use of the GPS receiver more user-friendly, many receivers send this data to a program that displays a map and shows its position.
Well, this article and updates check, because as I said two more articles on the way!
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