A GPS navigator is a device that has become indispensable for motorists
The satellite system 'GLONASS' began operation in 1982. To date, the system consists of 23 satellites, of which 21 are used for their intended purpose. Another 2 satellites are in reserve. However, 18 are sufficient for servicing the territory of the Russian Federation.
In total, for stable operation of the system and a GPS navigator anywhere in the world, 24 satellites must encircle the planet.
The components of the system are navigation low-orbit satellites, ground control and tracking facilities, and the receiving devices themselves for accurately determining and establishing location coordinates. The main principle of the system is determining location from satellites. It is determined by measuring the distance to a given object from several points with known coordinates. The distance is calculated by the time it takes for the signal sent from the satellite to reach the receiver. That is, to calculate two-dimensional coordinates, the device needs to determine the position of three satellites. For more accurate data and to prevent errors arising from the difference between the receiver's and satellite's clocks, readings from four satellites are used, since a deviation of just 0.001 seconds leads to an error of 250 kilometers.
Therefore, when embarking on a long car trip, make sure that the GSM alarm system is working at home – if you get lost yourself, at least you will be at ease knowing that your home property is under protection.
At the beginning of this century, many people did not even dream that they would be able to purchase a device based on space technology. Today, GPS navigators are used by almost all pilots and yachtsmen, and automotive navigation systems are gradually coming into everyday use for every motorist.
However, if your GPS navigator breaks down and 'bites the dust', do not rush around the highway in search of the right direction. Such 'maneuvers' on the road usually attract the attention of traffic police officers, who, to check your condition, may offer you to blow into a breathalyzer. Therefore, the eternal companion and best friend on the road have always been and remain maps of the area.
_