PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/04-04:57:40
G02     54.0           36.7                3.7 +/-    0.83       5.6 +/-    0.83  0.040 / 0.060
G05     71.8           65.7                5.0 +/-    0.44       5.4 +/-    0.44  0.040 / 0.070
G12     187.4          42.3                8.1 +/-    0.62      11.3 +/-    0.62  0.040 / 0.060
G20     211.3          29.9                7.5 +/-    2.88      13.2 +/-    2.88  0.040 / 0.060
G21     264.8          12.6                3.3 +/-   12.41       8.7 +/-   12.41  0.310 / 0.440
G25     253.1          56.5                6.9 +/-    1.86       8.1 +/-    1.86  0.230 / 0.340
G29     322.9          46.8                5.4 +/-    0.39       7.1 +/-    0.39  0.120 / 0.220