Method for shortening hot start time of satellite receiver by using GEO satellite

The invention discloses a method for shortening the hot start time of a satellite receiver by using a GEO satellite, which belongs to the technical field of radio navigation and positioning, and comprises the following steps of: pre-storing a difference value between a non-GEO satellite launching moment and a GEO satellite launching moment in the satellite receiver; obtaining the emission time of GEO satellite signals; calculating the launching time of the non-GEO satellite; calculating a pseudo range and a satellite position; carrying out positioning calculation to obtain the position and clock error of the satellite receiver; and correcting the local time of the satellite receiver by using the calculated clock difference to finish the hot start. The hot start method provided by the invention not only solves the problem of quick hot start of the satellite receiver in the absence of a communication network and a local clock RTC, but also can enable the satellite receiver to realize quick positioning by shorte