PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/07-11:58:00
G10     258.3          32.1                5.5 +/-    2.15       9.3 +/-    2.15  0.110 / 0.370
G13     47.2           25.3                3.5 +/-    1.94       6.8 +/-    1.94  0.110 / 0.230
G15     68.7           53.0                5.2 +/-    0.55       6.4 +/-    0.55  0.070 / 0.050
G16     289.0          13.8                4.7 +/-    1.04      12.1 +/-    1.04  0.060 / 0.060
G20     45.2           46.4                3.7 +/-    1.20       4.8 +/-    1.20  0.050 / 0.040
G21     351.5          67.8                4.7 +/-    0.68       5.0 +/-    0.68  0.060 / 0.040
G26     260.4          11.8                5.4 +/-    0.93      14.3 +/-    0.93  0.130 / 0.340
G27     321.3          13.0                2.9 +/-    1.87       7.4 +/-    1.87  0.140 / 0.440
G29     165.9          38.4                6.3 +/-    0.80       9.4 +/-    0.80  0.200 / 0.080