PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/12-20:27:30
G02     60.8           32.6                7.3 +/-    0.58      12.1 +/-    0.58  0.030 / 0.040
G05     54.6           58.9                7.5 +/-    0.91       8.6 +/-    0.91  0.030 / 0.040
G12     181.2          26.2               10.4 +/-    1.17      19.7 +/-    1.17  0.130 / 0.290
G13     125.5          17.2               12.1 +/-    1.95      28.5 +/-    1.95  0.090 / 0.260
G15     164.7          13.1               13.5 +/-    3.25      35.1 +/-    3.25  0.090 / 0.130
G21     273.4          18.2                8.3 +/-    2.13      19.0 +/-    2.13  0.060 / 0.130
G25     231.2          49.6               10.0 +/-    2.47      12.7 +/-    2.47  0.050 / 0.110
G29     329.2          56.1                7.3 +/-    0.65       8.6 +/-    0.65  0.050 / 0.080