![]() ![]() The distance to a satellite is found by the precise time the satellite transmission arrives at the receiver. The accurate position of a satellite is repeatedly transmitted to all receivers in line of sight and usually require open sky. The position and distances to a given satellite determines the position of the receiver. To complete the mathematical calculation, GPS receivers uses the accurate position of at least 4 satellites and the distance to each to estimate 4 values: earth latitude, earth longitude, elevation and time. The process follows a simple mathematical principle called trilateration. Finally, your location is determined once the system triangulates your exact position on the planet to the nearest meters based on these distances. The receiver inside the GPS tracker then uses these signals to calculate your precise location from at least four of the GPS satellites. Each of these satellites in orbit sends microwave signals to a receiver. The main idea of GPS systems is to determine the location of a certain object or person in real time. GPS tracking systems utilize the global navigation satellite system (GNSS) network. ![]() GPS, or global positioning system makes use of 24 to 32 solar-powered satellites and their ground stations to transmit information to GPS-enabled. ![]() In rural areas tracking accuracy can vary from 0.25 mile to several miles, depending upon how many obstacles could be blocking the tower’s signal. Those areas where the GPS tracker is only getting picked up by a single tower, and if it’s equipped with only single omnidirectional antenna, the accuracy becomes even less. In the countryside, there are relatively fewer cell towers and a GPS tracker's signal may be picked up only by only one tower at much greater distance. In cities where there are a lot more vertical structures which can be barriers to GPS tracker broadcasting and receiving, there have to be many more cell towers distributed in order to have good service. If you have fewer than three cell towers available, pinpointing a GPS tracking device can become a lot less accurate. However, there are many places where there are fewer cell towers available, such as in the outskirts of the cities and out in the country. In cases where the GPS tracker is not exposed to the open sky being inside buildings or underground, in case there are no Wi-Fi routers around, cell tower triangulation may be the only location finding way since GPS signal is not available. In major metropolitan urban areas, the accuracy of GPS tracker pinpointing is relatively high because there are usually more cell towers with their signal coverage areas overlapping. In some cases, there actually may be more than three cell towers receiving a GPS tracker's signal, allowing for even better accuracy. At Tracki since we access to mapping of all cellular towers location worldwide, we know the locations of the cell towers which receive our GSM signal, and we can estimate the distance of the GPS tracker from each of those antenna towers, based upon the lag time between when the tower sends a ping to Tracki GPS tracker and receives the answering ping back. From a mathematical standpoint, if you have the distance to a location from each of three distinct points, you can compute the approximate location of that location in relation to the three reference points. In an ideal scenario, the GPS tracker’s signal may be picked up by 3 or more cell towers, enabling the triangulation to work. The less-accurate method is often called “Cell Tower Triangulation”, referring to how the cell towers calculate the tracker’s geophysical location. If Tracki GPS tracker can't find a GPS signal it will listen to all the WiFi routers around and report their MAC ID to our servers which have access to a mapping of worldwide WiFi routers and their location, accuracy is about 100-300 feet.ģ. Global Positioning System (GPS) capability, use signals from satellites to pinpoint location very accurately.Ģ. There are 3 methods for pinpointing the location of Tracki GPS tracker using geo-location data.ġ. ![]()
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