PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/12-02:57:40
G01     46.3           22.3                2.9 +/-    1.52       6.1 +/-    1.52  0.050 / 0.060
G06     178.5          28.4                5.3 +/-    1.59       9.5 +/-    1.59  0.040 / 0.050
G11     44.3           12.9                2.3 +/-    1.47       6.1 +/-    1.47  0.100 / 0.110
G13     246.2          27.4                5.1 +/-    2.06       9.4 +/-    2.06  0.080 / 0.120
G15     277.9          15.0                1.2 +/-    2.50       2.9 +/-    2.50  0.020 / 0.030
G17     331.9          76.5                5.3 +/-    0.33       5.5 +/-    0.33  0.020 / 0.020
G19     257.1          64.4                5.4 +/-    0.78       5.9 +/-    0.78  0.120 / 0.190
G24     318.8          11.6               -6.2 +/-   26.02     -16.6 +/-   26.02  0.240 / 0.240
G28     60.9           50.3                4.0 +/-    0.61       5.0 +/-    0.61  0.200 / 0.280
G30     150.7          31.9                6.5 +/-    1.62      11.0 +/-    1.62  0.220 / 0.350