PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/12-13:42:40
G02     204.5          29.3                8.2 +/-    1.16      14.6 +/-    1.16  0.110 / 0.140
G06     158.0          68.8                8.3 +/-    1.27       8.8 +/-    1.27  0.090 / 0.130
G12     307.9          17.6                3.8 +/-    1.47       8.9 +/-    1.47  0.040 / 0.040
G17     36.3           48.8                5.6 +/-    0.30       7.2 +/-    0.30  0.040 / 0.040
G19     346.0          67.3                4.9 +/-    0.49       5.3 +/-    0.49  0.060 / 0.090
G24     296.8          39.3                6.4 +/-    1.26       9.3 +/-    1.26  0.110 / 0.080
G28     101.0          32.6                7.9 +/-    1.61      13.2 +/-    1.61  0.060 / 0.140