PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/27-08:57:40
G01     117.2          19.2                4.7 +/-    1.76      10.6 +/-    1.76  0.030 / 0.030
G07     87.4           64.7                6.7 +/-    0.55       7.3 +/-    0.55  0.030 / 0.030
G08     43.5           27.6                2.0 +/-    0.60       3.7 +/-    0.60  0.170 / 0.190
G09     173.1          19.1                6.7 +/-    2.77      15.1 +/-    2.77  0.110 / 0.200
G11     102.0          40.8                7.2 +/-    0.64      10.4 +/-    0.64  0.030 / 0.040
G13     316.4          21.5               -0.1 +/-    2.31      -0.1 +/-    2.31  0.040 / 0.040
G17     201.5          28.5                6.2 +/-    1.90      11.2 +/-    1.90  0.120 / 0.200
G18     90.3           21.5                6.0 +/-    0.90      12.7 +/-    0.90  0.160 / 0.230
G28     295.1          57.6                4.3 +/-    1.05       5.0 +/-    1.05  0.060 / 0.250
G30     346.8          69.4                3.5 +/-    0.72       3.7 +/-    0.72  0.070 / 0.240