PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/30-09:57:40
G07     15.9           68.1                5.0 +/-    0.99       5.3 +/-    0.99  0.040 / 0.040
G08     61.1           46.1                4.2 +/-    0.76       5.6 +/-    0.76  0.050 / 0.050
G09     176.9          47.1                6.3 +/-    0.93       8.3 +/-    0.93  0.030 / 0.030
G11     128.7          27.8                5.1 +/-    1.73       9.4 +/-    1.73  0.030 / 0.030
G18     114.1          10.1               -2.2 +/-   19.05      -6.1 +/-   19.05  0.130 / 0.220
G23     160.7          20.9                4.8 +/-    1.52      10.3 +/-    1.52  0.120 / 0.190
G27     40.8           17.7                3.3 +/-    2.34       7.6 +/-    2.34  0.200 / 0.350
G28     258.2          45.0                6.1 +/-    2.84       8.2 +/-    2.84  0.170 / 0.290
G30     318.3          48.7                3.1 +/-    0.60       4.0 +/-    0.60  0.170 / 0.320