Carrier real-time positioning method based on PPP-B2b signal

The invention provides a carrier real-time positioning method based on a PPP-B2b signal. The method comprises the following steps: receiving satellite observation data, broadcast ephemeris data and a PPP-B2b telegraph text broadcasted by a satellite through a receiver of a carrier, decoding the PPP-B2b telegraph text to obtain correction information, performing error correction on a satellite position and clock correction calculated by the broadcast ephemeris data by using the correction information, and obtaining the real-time position, speed and clock correction of the satellite; constructing a related model to correct various errors in the satellite observation data to obtain a carrier phase observation value after error correction; and carrying out real-time positioning on the carrier by taking the carrier phase observation value after error correction as measurement input of extended Kalman filtering. In order to solve the problem that the ambiguity is repeatedly updated due to frequent change of visible