PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/28-04:57:50
G01     307.5          33.0                4.7 +/-    1.45       7.7 +/-    1.45  0.100 / 0.120
G10     105.8          40.0                6.8 +/-    1.06       9.8 +/-    1.06  0.070 / 0.140
G11     281.5          28.2                4.9 +/-    1.08       8.9 +/-    1.08  0.100 / 0.120
G14     351.0          67.6                5.5 +/-    0.62       5.9 +/-    0.62  0.070 / 0.110
G18     277.7          49.7               13.1 +/-    1.22      16.6 +/-    1.22  0.070 / 0.130
G20     116.2          34.1               15.0 +/-    2.14      24.3 +/-    2.14  0.070 / 0.130
G22     309.8          25.9                6.1 +/-    2.18      11.7 +/-    2.18  0.030 / 0.040
G25     82.0           16.3                5.3 +/-    3.38      12.8 +/-    3.38  0.030 / 0.050
G31     162.0          66.4                8.0 +/-    0.75       8.7 +/-    0.75  0.080 / 0.170
G32     37.9           51.1                7.3 +/-    1.83       9.0 +/-    1.83  0.110 / 0.200