PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/03-07:28:00
G10     241.6          18.1                6.8 +/-    1.54      15.7 +/-    1.54  0.100 / 0.380
G13     66.2           35.3                6.7 +/-    0.46      10.6 +/-    0.46  0.110 / 0.390
G15     108.0          56.2                8.0 +/-    0.35       9.4 +/-    0.35  0.140 / 0.310
G16     307.0          14.5                2.5 +/-    1.73       6.3 +/-    1.73  0.100 / 0.290
G20     346.9          74.7                6.0 +/-    0.74       6.2 +/-    0.74  0.040 / 0.040
G21     321.5          52.8                6.6 +/-    0.69       8.1 +/-    0.69  0.040 / 0.040
G26     278.2          19.4                5.0 +/-    1.58      11.2 +/-    1.58  0.040 / 0.060
G29     160.6          62.8                9.2 +/-    1.20      10.2 +/-    1.20  0.040 / 0.060