GNSS (Global Navigation Satellite System) positioning correction method considering diffraction non-line-of-sight signals

The invention discloses a GNSS (Global Navigation Satellite System) positioning correction method considering diffraction non-line-of-sight signals, which is characterized in that NLOS (Non-line-of-sight) signals are divided into two different types, namely reflection and diffraction, and correction is carried out by adopting different models in GNSS positioning, and the method specifically comprises the following steps of: carrying out signal reflection and diffraction detection on the NLOS signals, and if the NLOS signals are judged to be reflection signals, calculating reflection signal delay; if the NLOS signals are determined to be the diffraction signals, the diffraction signal delay is calculated, and the positioning precision in the urban environment can be effectively improved by distinguishing and correcting different NLOS signals. Compared with the prior art, the method has the advantages that the NLOS signals are divided into the reflection signals and the diffraction signals ...