PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/21-09:58:20
G01     318.6          19.8                4.6 +/-    2.06      10.2 +/-    2.06  0.170 / 0.310
G08     255.9          12.7                6.7 +/-    1.51      17.5 +/-    1.51  0.130 / 0.460
G10     82.6           51.2                4.8 +/-    1.09       6.0 +/-    1.09  0.150 / 0.280
G11     301.0          24.1                7.0 +/-    1.02      13.9 +/-    1.02  0.150 / 0.270
G14     303.4          71.5                6.1 +/-    0.48       6.4 +/-    0.48  0.030 / 0.050
G18     301.9          43.3                6.3 +/-    1.17       8.7 +/-    1.17  0.030 / 0.040
G20     106.8          27.8                4.3 +/-    0.93       7.9 +/-    0.93  0.090 / 0.220
G22     302.9          15.5                3.1 +/-    4.43       7.7 +/-    4.43  0.090 / 0.220
G31     176.2          42.9                7.8 +/-    1.19      10.9 +/-    1.19  0.050 / 0.050
G32     358.0          69.2                6.2 +/-    0.76       6.6 +/-    0.76  0.050 / 0.050