PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/28-00:58:00
G01     129.7          9.6               -18.1 +/-   13.67     -50.9 +/-   13.67  0.090 / 0.110
G07     41.7           69.7                6.4 +/-    1.00       6.8 +/-    1.00  0.140 / 0.110
G08     54.2           43.4                6.1 +/-    1.01       8.4 +/-    1.01  0.250 / 0.210
G09     179.5          40.7                8.8 +/-    0.76      12.7 +/-    0.76  0.100 / 0.220
G11     124.1          32.5                7.1 +/-    1.19      11.8 +/-    1.19  0.030 / 0.050
G17     199.9          11.1               -2.3 +/-   20.87      -6.3 +/-   20.87  0.040 / 0.040
G23     160.4          10.3                8.5 +/-    2.88      23.4 +/-    2.88  0.030 / 0.030
G28     272.0          51.6                6.8 +/-    3.06       8.4 +/-    3.06  0.030 / 0.030
G30     334.2          60.6                4.1 +/-    0.64       4.6 +/-    0.64  0.190 / 0.370