PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-21:57:30
G02     204.4          39.7               17.7 +/-    0.69      25.9 +/-    0.69  0.090 / 0.140
G06     148.4          73.9               15.6 +/-    0.68      16.2 +/-    0.68  0.090 / 0.230
G12     310.1          19.2               11.0 +/-    2.13      24.7 +/-    2.13  0.060 / 0.070
G17     37.2           48.6               12.1 +/-    1.76      15.6 +/-    1.76  0.050 / 0.070
G19     6.8            63.4               12.9 +/-    0.52      14.2 +/-    0.52  0.030 / 0.030
G24     292.7          40.1                9.9 +/-    8.12      14.4 +/-    8.12  0.020 / 0.030
G28     106.7          28.1               15.4 +/-    1.18      28.0 +/-    1.18  0.080 / 0.150