PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/12-09:58:00
G01     117.8          18.8                5.7 +/-    1.72      12.9 +/-    1.72  0.030 / 0.020
G07     85.6           65.2                5.9 +/-    0.53       6.5 +/-    0.53  0.030 / 0.030
G08     43.8           28.4                3.0 +/-    2.36       5.3 +/-    2.36  0.150 / 0.190
G09     173.7          20.4                6.2 +/-    1.67      13.5 +/-    1.67  0.140 / 0.140
G11     103.1          40.6                7.0 +/-    0.54      10.1 +/-    0.54  0.240 / 0.300
G13     316.8          21.0                3.7 +/-    1.89       8.0 +/-    1.89  0.160 / 0.250
G17     201.5          27.5                6.2 +/-    1.04      11.4 +/-    1.04  0.060 / 0.050
G18     91.3           21.3                5.6 +/-    3.13      11.9 +/-    3.13  0.060 / 0.060
G28     294.2          57.5                5.5 +/-    0.97       6.4 +/-    0.97  0.030 / 0.030
G30     345.9          68.9                5.4 +/-    0.59       5.8 +/-    0.59  0.040 / 0.030