PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/21-17:12:50
G01     317.2          21.7                7.5 +/-    3.31      15.8 +/-    3.31  0.090 / 0.210
G08     254.7          10.7                7.9 +/-    2.12      21.6 +/-    2.12  0.070 / 0.240
G10     86.5           51.0                7.3 +/-    0.87       9.1 +/-    0.87  0.060 / 0.040
G11     300.3          24.0                7.0 +/-    2.28      14.0 +/-    2.28  0.050 / 0.050
G14     310.0          70.8                7.7 +/-    0.73       8.1 +/-    0.73  0.200 / 0.350
G18     106.6          23.7                9.3 +/-    2.07      18.8 +/-    2.07  0.260 / 0.280
G22     303.0          14.2                6.2 +/-    1.97      15.7 +/-    1.97  0.200 / 0.200
G25     97.5           10.6               13.3 +/-    3.13      36.7 +/-    3.13  0.170 / 0.210
G31     175.1          47.1               10.8 +/-    0.72      14.1 +/-    0.72  0.040 / 0.030
G32     16.0           63.9                7.4 +/-    0.60       8.1 +/-    0.60  0.030 / 0.020