The invention provides a method for improving fixed correct rate of network RTK double-difference wide lane
ambiguity. The method comprises the following steps of 1,
data preparation, namely receivingreal-time observing data,
satellite ephemeris and coordinate information of a GNSS reference
station; 2, performing real-time
ionosphere product calculation, namely performing non-difference precisesingle-point positioning according to coordinate information and
satellite coordinate of the reference
station, and calculating a non-difference real-time
ionosphere delay value of a
satellite signalpropagation path; and 3, performing baseline double-difference wide lane
ambiguity calculation, wherein the step 3 comprises a procedure 3.1, forming a double-difference observing value by the observing data of two reference stations, and correcting a double-difference
ionosphere residual item by means of the non-difference real-time ionosphere
delay value calculated by the step 2; procedure 3.2,calculating a
floating point solution of the double-difference wide lane
ambiguity; and procedure 3.3, performing
rounding on the
floating point solution of the double-difference wide lane ambiguity for obtaining a double-difference wide lane ambiguity. The method improves correct rate in understanding the baseline double-difference wide lane ambiguity, thereby improving precision and stability ofthe network RTK.