PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/18-10:58:00
G07     29.4           69.3                4.3 +/-    0.42       4.6 +/-    0.42  0.030 / 0.040
G08     56.0           43.5                4.5 +/-    1.27       6.2 +/-    1.27  0.040 / 0.040
G09     176.8          42.0                5.0 +/-    1.08       7.0 +/-    1.08  0.030 / 0.020
G11     124.6          30.8                4.4 +/-    1.02       7.5 +/-    1.02  0.030 / 0.030
G18     110.1          12.7                3.5 +/-    2.47       9.1 +/-    2.47  0.150 / 0.290
G23     160.8          15.5                3.5 +/-    3.17       8.6 +/-    3.17  0.170 / 0.280
G27     38.9           13.7                2.3 +/-    1.78       5.8 +/-    1.78  0.300 / 0.210
G28     264.6          48.2                3.7 +/-    3.28       4.8 +/-    3.28  0.270 / 0.150
G30     323.0          52.8                3.1 +/-    0.54       3.8 +/-    0.54  0.150 / 0.300