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                4.1 +/-   13.05      11.0 +/-   13.05  0.030 / 0.030
G07     55.8           69.2                6.1 +/-    0.36       6.4 +/-    0.36  0.030 / 0.020
G08     49.2           37.5                4.5 +/-    1.15       6.8 +/-    1.15  0.190 / 0.260
G09     174.5          31.2                6.3 +/-    1.47      10.8 +/-    1.47  0.220 / 0.350
G11     116.4          35.8                8.0 +/-    1.01      12.6 +/-    1.01  0.050 / 0.030
G13     320.9          12.3                0.3 +/-    9.03       0.8 +/-    9.03  0.040 / 0.030
G17     199.3          16.6                4.2 +/-    2.19       9.9 +/-    2.19  0.090 / 0.270
G18     102.1          16.8                5.7 +/-    1.85      13.5 +/-    1.85  0.120 / 0.360
G28     275.7          52.4                4.4 +/-    3.46       5.4 +/-    3.46  0.100 / 0.220
G30     331.2          59.6                4.3 +/-    0.35       4.8 +/-    0.35  0.100 / 0.230