PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/12-02:42:30
G02     199.7          19.0                6.9 +/-    1.85      15.5 +/-    1.85  0.050 / 0.050
G06     176.2          47.4                7.1 +/-    1.19       9.3 +/-    1.19  0.050 / 0.040
G13     228.2          14.8                6.8 +/-    2.60      17.1 +/-    2.60  0.190 / 0.510
G17     22.5           59.8                5.0 +/-    0.73       5.6 +/-    0.73  0.320 / 0.300
G19     311.4          71.2                4.2 +/-    0.47       4.4 +/-    0.47  0.110 / 0.110
G24     309.8          30.3                4.6 +/-    0.88       8.0 +/-    0.88  0.080 / 0.110
G28     82.9           43.5                5.2 +/-    1.98       7.2 +/-    1.98  0.070 / 0.060
G30     157.0          17.1                5.7 +/-    0.83      13.4 +/-    0.83  0.050 / 0.070