PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/26-08:13:00
G08     320.1          11.0               -4.5 +/-   29.75     -12.3 +/-   29.75  0.090 / 0.240
G10     312.5          56.0                4.2 +/-    0.63       5.0 +/-    0.63  0.100 / 0.310
G14     213.9          17.2                5.6 +/-    1.07      13.1 +/-    1.07  0.050 / 0.090
G15     45.6           19.1                1.8 +/-    0.83       4.0 +/-    0.83  0.050 / 0.090
G20     61.9           41.5                4.9 +/-    0.58       7.0 +/-    0.58  0.080 / 0.130
G21     120.1          66.8                6.2 +/-    0.74       6.7 +/-    0.74  0.080 / 0.130
G24     86.5           29.3                6.0 +/-    0.95      10.7 +/-    0.95  0.040 / 0.070
G27     288.1          37.4                5.9 +/-    1.11       8.9 +/-    1.11  0.040 / 0.080
G32     215.4          43.4                8.0 +/-    1.14      11.0 +/-    1.14  0.030 / 0.030