PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/27-14:42:50
G01     128.8          10.2               -4.9 +/-   39.84     -13.7 +/-   39.84  0.050 / 0.060
G07     45.1           69.8               10.7 +/-    0.63      11.3 +/-    0.63  0.050 / 0.050
G08     52.5           41.7                9.4 +/-    0.87      13.2 +/-    0.87  0.030 / 0.040
G09     177.6          37.5               10.4 +/-    0.81      15.8 +/-    0.81  0.030 / 0.030
G11     120.6          34.0               12.4 +/-    0.89      20.1 +/-    0.89  0.030 / 0.030
G17     200.1          11.8                2.5 +/-   18.90       6.8 +/-   18.90  0.040 / 0.030
G18     105.8          15.5               11.6 +/-    1.58      28.4 +/-    1.58  0.110 / 0.320
G28     272.8          51.7               10.3 +/-    2.73      12.7 +/-    2.73  0.130 / 0.350
G30     330.1          58.4               10.0 +/-    0.88      11.5 +/-    0.88  0.050 / 0.070