PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/20-04:57:40
G01     317.0          22.3                6.3 +/-    2.64      13.1 +/-    2.64  0.140 / 0.410
G08     252.6          10.4                8.2 +/-    4.46      22.7 +/-    4.46  0.130 / 0.470
G10     87.8           50.0                5.6 +/-    0.66       7.0 +/-    0.66  0.040 / 0.060
G11     297.8          25.4                9.4 +/-    1.18      18.1 +/-    1.18  0.050 / 0.060
G14     307.4          70.3                5.9 +/-    0.94       6.2 +/-    0.94  0.100 / 0.170
G18     299.1          43.8                7.8 +/-    1.23      10.7 +/-    1.23  0.100 / 0.150
G20     104.1          40.9                8.1 +/-    2.35      11.6 +/-    2.35  0.030 / 0.040
G22     303.6          14.9                8.0 +/-    3.12      19.8 +/-    3.12  0.030 / 0.040
G31     172.1          50.0                6.4 +/-    1.01       8.1 +/-    1.01  0.110 / 0.220
G32     20.3           62.2                4.2 +/-    0.63       4.6 +/-    0.63  0.110 / 0.190