What brand of gps for car tracking hidden is good? from yilian's blog

　　When choosing gps for car tracking hidden, various factors should be considered comprehensively. Here to share some small experiences, I hope to help you. The first is the positioning accuracy. Generally, the deviation of 5~10 meters in GPS positioning is a normal phenomenon. If the positioning deviation of the product is as much as tens of meters, or even hundreds of meters, such products can be ignored.​​

　　The second performance to be compared is the receiving ability. GPS is actually a receiver of satellite signals. When the GPS receiver receives 3 or more satellite signals, it can calculate the geodetic coordinates where the receiver is located. 4 satellites are received and the altitude can also be calculated.​​

　　The third thing to pay attention to is the satellite trajectories. There are a total of 24 GPS satellites orbiting the earth along six orbits, each in groups of 4 satellites, 12 satellites each in the east and west hemispheres, no more and no less, most GPS receivers can Track 8 to 12 satellites. At least 3 satellites are needed to calculate the coordinates, and for a given position, the GPS receiver knows which satellites are nearby at the time because it is constantly receiving updates from the satellites.​​

　　The fourth point is parallel channels. Generally, GPS devices have 2 to 5 parallel channels to receive satellite signals, and many may have 12 satellites visible (the average is 8). Most GPS receivers are of the 12-channel parallel type, which allows them to continuously track information from each satellite. Advantages of 12-channel receivers include fast cold start and initialization of satellite information, and better reception in forested areas effectiveness. The last thing to pay attention to is the positioning time. The positioning time is the time required to determine the current position when the GPS receiver is restarted. The closer the distance to the last positioning position, the shorter the startup time, and the cold startup time is generally longer than the hot startup time.

　　gps for car tracking hidden https://www.eelinktracker.com/Magnetic-GPS-Tracker/