PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-08:28:10
G08     274.9          19.4                5.8 +/-    1.09      12.9 +/-    1.09  0.170 / 0.330
G10     51.6           60.2                6.1 +/-    0.71       6.9 +/-    0.71  0.270 / 0.320
G11     315.2          13.1                1.6 +/-    4.67       4.0 +/-    4.67  0.120 / 0.240
G18     314.8          26.8                3.3 +/-    1.39       6.1 +/-    1.39  0.190 / 0.240
G20     98.9           21.9                4.7 +/-    1.30       9.8 +/-    1.30  0.520 / 0.480
G21     153.9          20.3                5.7 +/-    2.19      12.5 +/-    2.19  0.470 / 0.380
G24     41.7           13.2                1.7 +/-    4.14       4.4 +/-    4.14  0.090 / 0.230
G27     235.2          19.0               10.2 +/-    4.75      23.0 +/-    4.75  0.150 / 0.190
G31     177.7          27.2                7.1 +/-    0.85      13.2 +/-    0.85  0.090 / 0.450
G32     328.0          75.9                7.3 +/-    0.66       7.5 +/-    0.66  0.170 / 0.340