PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/12-09:42:50
G01     123.4          14.6                5.2 +/-    1.58      13.1 +/-    1.58  0.030 / 0.030
G07     68.2           68.2                6.3 +/-    0.39       6.7 +/-    0.39  0.030 / 0.030
G08     46.7           34.2                4.8 +/-    0.93       7.7 +/-    0.93  0.130 / 0.220
G09     174.4          27.1                4.7 +/-    1.64       8.7 +/-    1.64  0.150 / 0.270
G11     111.6          37.9                7.7 +/-    0.83      11.6 +/-    0.83  0.150 / 0.260
G13     319.6          15.7                3.1 +/-    2.27       7.7 +/-    2.27  0.110 / 0.340
G17     200.0          20.7                5.6 +/-    1.79      12.1 +/-    1.79  0.070 / 0.090
G18     98.1           18.7                4.6 +/-    2.26      10.5 +/-    2.26  0.070 / 0.060
G28     282.6          54.6                4.6 +/-    2.55       5.6 +/-    2.55  0.030 / 0.020
G30     336.2          63.2                4.8 +/-    0.66       5.3 +/-    0.66  0.020 / 0.030