If you are not an industry technician of GPS locators, it is difficult to imagine that the car GPS locators used in daily life will have three different starting states: cold start, hot start, and warm start, which are closely related to the normal operation and online positioning of the car GPS locators. These three startup states are actually working modes generated in practical applications, rather than in GPS principles. Today, we will discuss topics and experiences related to GPS activation.

　　The first thing to discuss is the hot start state. If the interval between the car GPS locator and the last shutdown is less than 120 minutes, that is, within two hours, the car GPS locator will save the vehicle position and visible satellite position within the area before the last shutdown, and retain the historical data of the current time, calendar, and ephemeris. In the hot start state, the car GPS locator is online and the positioning speed is very fast, usually completed within one minute.

　　Let's talk about the warm start status. If the start time of the car GPS locator is more than 120 minutes since the last shutdown time, that is, more than two hours, the car GPS locator will also retain the historical data of the current time, calendar, and ephemeris. However, after the GPS locator is restarted, it will calculate based on the final position and reconnection data to obtain a new visible satellite position. In the warm start state, the start-up and positioning speed of the car GPS locator is also very fast, usually completed within three minutes.

　　Finally, there are many scenarios for the cold start state. The first scenario is the newly purchased car GPS locator, which is being used for the first time; The second one is that when the car GPS locator is not used for a long time, it may last for several months. The third scenario is when the distance between the current position of the GPS locator and the last position exceeds 1000 kilometers. In these three cases, the car GPS locator may have cleared all historical data records. When GPS is activated, it is necessary to retry receiving time, calendar, ephemeris, and other data to re lock the visible satellite position within the area. In the cold start state, the online and positioning speed of the car GPS locator is very slow, usually taking a long time to regain data and lock the position.

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