PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/11-21:57:30
G02     201.3          28.5               23.0 +/-    0.69      41.5 +/-    0.69  0.120 / 0.390
G06     165.6          62.4               18.9 +/-    1.21      21.1 +/-    1.21  0.140 / 0.400
G12     303.9          10.7               -3.7 +/-   21.49     -10.2 +/-   21.49  0.050 / 0.130
G17     25.3           57.0               13.4 +/-    0.47      15.6 +/-    0.47  0.050 / 0.140
G19     340.7          69.0               13.7 +/-    0.92      14.5 +/-    0.92  0.080 / 0.110
G24     304.5          34.5               13.3 +/-    1.23      21.3 +/-    1.23  0.090 / 0.140
G28     96.0           35.2               14.5 +/-    0.41      22.9 +/-    0.41  0.060 / 0.140