PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/17-14:28:10
G02     220.9          60.1                9.6 +/-    0.62      10.9 +/-    0.62  0.130 / 0.090
G06     48.8           69.4                9.3 +/-    0.36       9.9 +/-    0.36  0.080 / 0.110
G12     320.7          43.3                7.9 +/-    1.32      10.9 +/-    1.32  0.060 / 0.070
G17     61.8           28.3                6.3 +/-    0.77      11.5 +/-    0.77  0.050 / 0.070
G19     39.1           50.0                8.2 +/-    0.69      10.3 +/-    0.69  0.040 / 0.030
G24     256.2          40.6                8.9 +/-    1.24      12.8 +/-    1.24  0.040 / 0.040
G28     125.2          11.2                8.3 +/-    1.97      22.5 +/-    1.97  0.050 / 0.040