PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-03:12:30
G02     199.3          20.5                5.4 +/-    1.87      11.7 +/-    1.87  0.040 / 0.080
G06     174.2          49.8                6.2 +/-    0.82       7.8 +/-    0.82  0.040 / 0.090
G13     229.5          14.6                5.5 +/-    1.66      13.8 +/-    1.66  0.030 / 0.040
G17     16.6           62.7                3.2 +/-    0.48       3.6 +/-    0.48  0.040 / 0.040
G19     316.8          71.4                2.9 +/-    0.67       3.0 +/-    0.67  0.040 / 0.060
G24     311.9          27.4                3.3 +/-    1.80       6.1 +/-    1.80  0.050 / 0.050
G28     86.1           40.4                4.2 +/-    0.99       6.1 +/-    0.99  0.100 / 0.180
G30     155.6          13.0                6.0 +/-    1.93      15.6 +/-    1.93  0.130 / 0.230