PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/04-08:12:40
G10     260.1          33.6                6.3 +/-    1.25      10.3 +/-    1.25  0.110 / 0.390
G13     45.8           23.7                4.2 +/-    2.71       8.5 +/-    2.71  0.130 / 0.340
G15     66.5           52.4                5.5 +/-    0.99       6.7 +/-    0.99  0.120 / 0.270
G16     285.4          13.8                4.4 +/-    1.47      11.3 +/-    1.47  0.140 / 0.260
G20     30.3           59.3                5.0 +/-    0.92       5.7 +/-    0.92  0.040 / 0.040
G21     350.3          67.9                4.6 +/-    0.93       4.9 +/-    0.93  0.040 / 0.040
G24     126.0          10.2               -7.7 +/-   27.07     -21.4 +/-   27.07  0.040 / 0.040
G26     257.5          10.9                4.2 +/-    4.56      11.6 +/-    4.56  0.040 / 0.040
G27     320.8          14.2                1.8 +/-    1.71       4.5 +/-    1.71  0.240 / 0.480
G29     167.0          38.0                6.7 +/-    0.55      10.0 +/-    0.55  0.170 / 0.290