GPS is an American satellite positioning system that provides global positioning and navigation services and can be planned into the satellite communications industry.

　　In China, GPS is mainly used for navigation and positioning, and the products can be divided into electronic products.

　　The most common GPS in daily life should belong to the navigation map on the mobile phone. However, the mobile phone is only equipped with GPS function, and the mobile phone is also an electronic product. So it's in the electronics industry

　　GPS cold start and computer cold and hot start similar, GPS also has cold, warm, hot start:

　　Cold start refers to the process of starting GPS in an unfamiliar environment until the GPS contacts the surrounding satellite and calculates the coordinates. The following situations are cold start:

　　1, the first use;

　　2. When the battery is exhausted and ephemeris information is lost;

　　3. Move the receiver more than 1000 kilometers in the off state.

　　In other words, cold start is a mandatory start through hardware, because the GPS has cleared the internal positioning information since the last operation, the GPS receiver has lost the satellite parameters, or the existing parameters are too different from the actual received satellite parameters, resulting in the navigator cannot work, and the coordinate data provided by the satellite must be obtained from the new. Therefore, the vehicle navigation from the basement is 100% cold start, which is also the reason for the long search time from the basement.

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