PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/17-09:12:50
G01     126.8          11.8                4.3 +/-    3.85      11.6 +/-    3.85  0.040 / 0.040
G07     55.8           69.2                5.3 +/-    0.52       5.6 +/-    0.52  0.040 / 0.040
G08     49.2           37.5                3.2 +/-    0.49       4.9 +/-    0.49  0.050 / 0.040
G09     174.5          31.2                7.6 +/-    1.09      13.0 +/-    1.09  0.030 / 0.030
G11     116.4          35.8                6.9 +/-    0.47      10.8 +/-    0.47  0.100 / 0.440
G13     320.9          12.3               -0.8 +/-    9.14      -2.2 +/-    9.14  0.110 / 0.390
G17     199.3          16.6                5.1 +/-    2.57      12.1 +/-    2.57  0.100 / 0.430
G18     102.1          16.8                4.4 +/-    1.38      10.5 +/-    1.38  0.110 / 0.330
G28     275.7          52.4                5.3 +/-    0.80       6.6 +/-    0.80  0.100 / 0.310
G30     331.2          59.6                3.6 +/-    1.07       4.1 +/-    1.07  0.110 / 0.360