Analysis of GPS flex power based on global grid

GPS IIR-M and IIF satellites have the capability to achieve flex power by distributing transmitting power between different signals, and in general, the power of P(Y) signal is typically improved. Since February 2020, with observations from IGS and iGMAS stations, the IIR-M and IIF satellites of the GPS system have activated flex power almost daily, most of which are regional in nature. To obtain the selected center points of GPS flex power, this paper proposes a method to divide the grid globally, calculate the satellite elevation angles, and perform statistical analysis. This paper verifies the correctness of the proposed method by using simulated data and previous literature data. Moreover, data from February 2020, April 2020, and March 2021 are analyzed and verified in this study. The study of flex power in different periods reveals that the locations of the center points and the way of application are constantly changed, leading to changes in the global availability of flex power.