PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/30-11:42:40
G01     56.5           28.9                3.9 +/-    2.01       7.0 +/-    2.01  0.070 / 0.140
G06     180.3          17.2                5.9 +/-    1.78      13.8 +/-    1.78  0.070 / 0.120
G07     143.5          17.2                4.8 +/-    1.93      11.2 +/-    1.93  0.110 / 0.150
G11     46.4           19.3                2.5 +/-    4.30       5.6 +/-    4.30  0.060 / 0.110
G13     260.7          33.6                5.4 +/-    1.81       8.8 +/-    1.81  0.040 / 0.050
G15     291.5          16.3                5.1 +/-    2.10      12.2 +/-    2.10  0.040 / 0.050
G17     286.1          79.7                4.9 +/-    0.71       5.0 +/-    0.71  0.200 / 0.290
G19     237.5          55.9                4.9 +/-    2.61       5.8 +/-    2.61  0.170 / 0.230
G28     42.2           55.2                1.7 +/-    1.72       2.0 +/-    1.72  0.030 / 0.020
G30     145.7          49.8                6.2 +/-    0.73       7.9 +/-    0.73  0.040 / 0.020