PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/25-19:27:50
G01     57.3           29.5               11.0 +/-    0.39      19.5 +/-    0.39  0.110 / 0.360
G07     143.5          20.1               14.0 +/-    1.53      30.8 +/-    1.53  0.090 / 0.380
G11     47.3           22.1               10.2 +/-    1.01      21.4 +/-    1.01  0.070 / 0.170
G13     259.3          34.2               14.7 +/-    1.17      23.7 +/-    1.17  0.080 / 0.170
G15     291.9          16.1               12.1 +/-    1.86      29.4 +/-    1.86  0.040 / 0.050
G17     263.7          75.5               14.1 +/-    0.68      14.5 +/-    0.68  0.050 / 0.060
G18     40.9           11.3               10.3 +/-    1.94      27.9 +/-    1.94  0.080 / 0.240
G19     235.4          51.5               14.8 +/-    0.93      18.3 +/-    0.93  0.080 / 0.210
G28     40.6           55.7               12.3 +/-    0.89      14.6 +/-    0.89  0.020 / 0.030
G30     145.4          48.9               15.3 +/-    1.42      19.6 +/-    1.42  0.030 / 0.030