PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-21:42:20
G02     202.4          32.7               18.6 +/-    1.10      30.9 +/-    1.10  0.080 / 0.240
G06     160.9          67.2               16.9 +/-    0.99      18.2 +/-    0.99  0.090 / 0.310
G12     306.5          14.0               10.7 +/-    1.60      27.2 +/-    1.60  0.060 / 0.110
G17     30.4           53.6               13.4 +/-    0.61      16.3 +/-    0.61  0.070 / 0.110
G19     351.8          67.1               12.7 +/-    0.75      13.7 +/-    0.75  0.090 / 0.080
G24     300.3          37.0               13.5 +/-    0.71      20.6 +/-    0.71  0.070 / 0.100
G28     100.3          32.6               14.4 +/-    2.00      24.0 +/-    2.00  0.060 / 0.130