PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/01-20:42:40
G01     127.4          11.5               17.3 +/-    2.78      46.6 +/-    2.78  0.090 / 0.060
G07     50.0           69.8               13.1 +/-    0.37      13.8 +/-    0.37  0.030 / 0.040
G08     53.4           44.0               12.3 +/-    0.85      16.8 +/-    0.85  0.340 / 0.470
G09     179.0          37.3               15.9 +/-    1.30      24.3 +/-    1.30  0.240 / 0.410
G11     121.4          34.6               15.8 +/-    1.96      25.3 +/-    1.96  0.050 / 0.060
G13     321.4          10.8               -3.4 +/-   21.16      -9.2 +/-   21.16  0.030 / 0.030
G17     201.2          11.2                1.2 +/-   34.06       3.2 +/-   34.06  0.360 / 0.350
G18     104.8          16.3               15.6 +/-    1.54      37.6 +/-    1.54  0.130 / 0.280
G28     276.3          53.1               13.1 +/-    3.46      15.9 +/-    3.46  0.040 / 0.050
G30     336.2          62.2               12.9 +/-    0.73      14.4 +/-    0.73  0.030 / 0.030