PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/04-17:27:50
G01     127.2          10.7               -8.1 +/-   40.46     -22.3 +/-   40.46  0.050 / 0.080
G07     66.2           66.1                9.4 +/-    0.35      10.2 +/-    0.35  0.060 / 0.090
G08     51.1           40.0                9.4 +/-    0.77      13.7 +/-    0.77  0.060 / 0.140
G09     179.1          38.6               11.2 +/-    1.04      16.8 +/-    1.04  0.060 / 0.120
G11     118.1          35.5               11.3 +/-    0.75      17.7 +/-    0.75  0.020 / 0.040
G13     321.0          11.7                4.5 +/-   22.75      12.0 +/-   22.75  0.020 / 0.050
G17     199.3          13.9               11.3 +/-    1.24      28.9 +/-    1.24  0.250 / 0.410
G18     102.6          16.1               10.8 +/-    1.31      26.2 +/-    1.31  0.230 / 0.300
G28     269.7          48.6                9.8 +/-    1.17      12.5 +/-    1.17  0.090 / 0.280
G30     334.6          61.6                8.8 +/-    0.60       9.9 +/-    0.60  0.080 / 0.280