Cold start refers to the process of starting GPS in an unfamiliar
environment until it contacts surrounding satellites and calculates coordinates.
The following situations are considered cold start when starting up:
1. When used for the first time;
2. When the battery is depleted and the ephemeris information is lost;
3. Move the receiver over a distance of 1000 kilometers in the shutdown
state.
That is to say, cold start is a mandatory start through hardware means,
because the internal positioning information has been cleared by GPS since the
last operation, the GPS receiver loses satellite parameters, or the existing
parameters differ too much from the actual received satellite parameters,
causing the navigation instrument to be unable to work. It is necessary to
obtain the coordinate data provided by the satellite again. Therefore, starting
the navigation from the ground database is 100% considered cold start, which is
also the reason for the long time it takes to search for satellites from the
ground database.
Warm start refers to a start that has been more than 2 hours since the last
positioning time, and the star search positioning time is between cold start and
hot start. If you have used the GPS system for positioning the day before, the
first startup the next day will be considered a warm start, and the last
location information will be displayed after startup. Because the latitude,
longitude, and altitude were known before the last shutdown, but due to the long
shutdown time, the ephemeris changed and the previous satellites could not
receive it. Several satellites in the parameters have lost contact with the GPS
receiver and need to continue searching for stars to supplement position
information. Therefore, the search time for stars should be longer than hot
start and shorter than cold start.
Hot start refers to starting the GPS system without too much movement at
the last shutdown location, but the time from the last positioning must be less
than 2 hours. Through software, some preparation work such as saving and closing
before starting is carried out before starting.
Read recommendations:
Pet GPS Tracker sales
simple gps tracking Manufacturing
TK08A Motorcycle GPS Tracker
Advantages of traditional GPS and new technology GPS solutions
GPS Core Functions and Service Development Trend
Language
EN
