PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/31-02:43:10
G01     75.2           33.3                2.3 +/-    1.22       3.7 +/-    1.22  0.040 / 0.050
G07     135.2          34.5                5.6 +/-    1.77       9.0 +/-    1.77  0.030 / 0.040
G11     58.1           34.7                3.0 +/-    1.20       4.8 +/-    1.20  0.060 / 0.060
G13     280.3          37.4                5.0 +/-    2.19       7.7 +/-    2.19  0.070 / 0.090
G15     305.0          15.0                0.4 +/-    2.74       1.1 +/-    2.74  0.040 / 0.040
G17     227.6          64.9                6.3 +/-    1.22       6.9 +/-    1.22  0.040 / 0.030
G19     221.7          39.3                6.7 +/-    1.72       9.9 +/-    1.72  0.080 / 0.230
G28     14.3           59.8                2.5 +/-    0.58       2.8 +/-    0.58  0.070 / 0.240
G30     131.2          61.3                5.0 +/-    0.59       5.6 +/-    0.59  0.080 / 0.070