PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/12-08:57:40
G08     273.2          18.8                6.3 +/-    1.52      14.4 +/-    1.52  0.040 / 0.060
G10     55.6           59.6                5.1 +/-    0.73       5.8 +/-    0.73  0.040 / 0.070
G14     256.3          60.1                6.2 +/-    0.58       7.1 +/-    0.58  0.140 / 0.280
G18     314.0          28.5                6.7 +/-    3.28      12.1 +/-    3.28  0.090 / 0.270
G20     101.6          17.6                4.4 +/-    1.31      10.2 +/-    1.31  0.150 / 0.200
G21     154.3          18.3                5.7 +/-    2.72      13.1 +/-    2.72  0.170 / 0.270
G24     40.8           11.9                3.1 +/-    1.67       8.2 +/-    1.67  0.030 / 0.030
G27     233.6          17.6                8.1 +/-    0.84      19.0 +/-    0.84  0.030 / 0.030
G31     177.3          29.2                7.4 +/-    1.37      13.1 +/-    1.37  0.120 / 0.330
G32     335.8          75.1                6.8 +/-    0.87       7.0 +/-    0.87  0.080 / 0.280