PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/23-10:27:30
G07     17.4           68.3                3.6 +/-    1.49       3.9 +/-    1.49  0.050 / 0.040
G08     60.6           46.0                2.8 +/-    0.56       3.7 +/-    0.56  0.040 / 0.040
G09     177.0          46.6                3.7 +/-    1.47       4.8 +/-    1.47  0.020 / 0.030
G11     128.4          28.1                4.2 +/-    1.92       7.7 +/-    1.92  0.030 / 0.030
G18     113.6          10.4               -0.6 +/-   16.30      -1.6 +/-   16.30  0.370 / 0.170
G23     160.6          19.9                4.1 +/-    1.96       9.1 +/-    1.96  0.300 / 0.210
G27     40.5           17.2                2.4 +/-    3.52       5.6 +/-    3.52  0.120 / 0.170
G28     259.0          45.5                6.4 +/-    2.77       8.5 +/-    2.77  0.110 / 0.150
G30     319.0          49.3                3.7 +/-    0.82       4.7 +/-    0.82  0.180 / 0.410