PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/12-14:42:50
G02     53.6           37.4                6.4 +/-    0.37       9.7 +/-    0.37  0.020 / 0.040
G05     78.3           68.6                8.4 +/-    0.58       9.0 +/-    0.58  0.030 / 0.030
G12     188.2          42.8               10.6 +/-    1.73      14.7 +/-    1.73  0.040 / 0.070
G20     204.6          49.3               12.0 +/-    1.16      15.2 +/-    1.16  0.070 / 0.080
G21     265.6          15.2                6.3 +/-    1.71      15.7 +/-    1.71  0.110 / 0.320
G25     249.4          56.7                9.3 +/-    1.17      10.9 +/-    1.17  0.150 / 0.430
G29     327.1          52.1                5.0 +/-    0.92       6.2 +/-    0.92  0.050 / 0.060