PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/18-03:42:40
G01     71.9           33.0                2.4 +/-    0.82       3.9 +/-    0.82  0.030 / 0.040
G07     136.9          31.8                6.2 +/-    0.74      10.4 +/-    0.74  0.030 / 0.060
G11     55.6           32.5                2.0 +/-    0.42       3.3 +/-    0.42  0.100 / 0.330
G13     276.9          37.2                5.6 +/-    1.16       8.5 +/-    1.16  0.120 / 0.370
G15     302.7          15.6               -0.4 +/-    1.95      -0.9 +/-    1.95  0.040 / 0.050
G17     232.0          68.0                2.8 +/-    0.77       3.0 +/-    0.77  0.040 / 0.040
G19     223.6          42.0                4.8 +/-    0.76       6.8 +/-    0.76  0.050 / 0.080
G28     19.2           59.2                2.5 +/-    0.24       2.8 +/-    0.24  0.060 / 0.090
G30     134.1          59.3                4.7 +/-    0.58       5.3 +/-    0.58  0.040 / 0.070