PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/03-07:42:50
G10     246.7          23.0                6.9 +/-    1.82      14.1 +/-    1.82  0.130 / 0.270
G13     58.6           32.8                5.7 +/-    1.35       9.5 +/-    1.35  0.090 / 0.260
G15     94.3           57.3                7.6 +/-    0.98       8.9 +/-    0.98  0.050 / 0.040
G16     300.5          15.3                2.3 +/-    2.67       5.7 +/-    2.67  0.040 / 0.050
G20     6.0            70.4                5.3 +/-    0.43       5.6 +/-    0.43  0.040 / 0.040
G21     328.8          57.4                5.5 +/-    0.30       6.4 +/-    0.30  0.040 / 0.040
G26     271.5          17.4                5.6 +/-    1.81      13.2 +/-    1.81  0.030 / 0.030
G29     163.3          55.0                9.2 +/-    0.49      11.0 +/-    0.49  0.030 / 0.040