PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/15-07:12:30
G02     31.9           56.9                2.6 +/-    1.16       3.0 +/-    1.16  0.030 / 0.040
G05     143.2          59.0                6.0 +/-    0.68       6.9 +/-    0.68  0.030 / 0.040
G06     51.0           21.2                1.7 +/-    2.95       3.7 +/-    2.95  0.190 / 0.460
G12     211.0          72.9                3.9 +/-    0.37       4.0 +/-    0.37  0.210 / 0.550
G19     97.1           12.0                4.2 +/-    2.19      11.2 +/-    2.19  0.030 / 0.030
G20     200.3          17.7                3.9 +/-    1.38       9.0 +/-    1.38  0.020 / 0.030
G25     303.0          50.0                2.6 +/-    4.40       3.3 +/-    4.40  0.190 / 0.200
G29     305.2          26.3                3.7 +/-    0.70       7.1 +/-    0.70  0.120 / 0.280