PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/26-12:27:50
G02     202.4          22.1                3.1 +/-    1.85       6.4 +/-    1.85  0.040 / 0.110
G06     166.7          60.0                5.5 +/-    0.88       6.3 +/-    0.88  0.040 / 0.090
G12     303.1          11.1               -3.1 +/-   14.16      -8.4 +/-   14.16  0.140 / 0.360
G17     29.1           54.6                3.5 +/-    0.43       4.2 +/-    0.43  0.110 / 0.300
G19     323.7          69.6                4.0 +/-    0.51       4.3 +/-    0.51  0.070 / 0.110
G24     304.5          35.1                2.9 +/-    1.08       4.6 +/-    1.08  0.060 / 0.090
G28     92.6           37.7                3.5 +/-    0.96       5.3 +/-    0.96  0.040 / 0.040
G30     158.2          11.5                2.8 +/-    2.51       7.5 +/-    2.51  0.040 / 0.030