PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/19-14:27:50
G01     97.6           29.7               10.0 +/-    0.64      17.7 +/-    0.64  0.040 / 0.040
G07     118.9          51.1               11.2 +/-    0.39      13.9 +/-    0.39  0.030 / 0.040
G08     41.8           12.2                6.5 +/-    3.21      17.3 +/-    3.21  0.060 / 0.130
G11     76.0           41.6               10.7 +/-    0.65      15.2 +/-    0.65  0.070 / 0.110
G13     301.4          33.7               10.4 +/-    0.85      17.0 +/-    0.85  0.030 / 0.040
G17     210.2          47.1               12.3 +/-    0.79      16.1 +/-    0.79  0.030 / 0.050
G18     70.3           24.5                8.8 +/-    0.78      17.5 +/-    0.78  0.040 / 0.080
G19     212.3          18.5                9.0 +/-    1.80      20.5 +/-    1.80  0.040 / 0.090
G28     335.8          61.8                9.4 +/-    0.46      10.5 +/-    0.46  0.040 / 0.060
G30     69.7           80.0                9.6 +/-    0.43       9.7 +/-    0.43  0.040 / 0.060