PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/19-04:27:30
G03     255.1          69.4                5.2 +/-    0.47       5.5 +/-    0.47  0.030 / 0.050
G09     302.8          20.1                3.7 +/-    2.04       8.2 +/-    2.04  0.030 / 0.060
G14     96.1           17.6                4.7 +/-    1.71      11.0 +/-    1.71  0.120 / 0.370
G16     130.4          56.1                6.8 +/-    0.45       8.0 +/-    0.45  0.150 / 0.400
G22     200.3          60.2                5.7 +/-    0.98       6.5 +/-    0.98  0.050 / 0.060
G23     315.4          45.0                4.5 +/-    1.10       6.0 +/-    1.10  0.040 / 0.080
G26     74.7           52.7                5.3 +/-    0.52       6.5 +/-    0.52  0.030 / 0.070
G31     50.4           22.2                2.0 +/-    1.14       4.1 +/-    1.14  0.030 / 0.060