PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/16-13:57:20
G02     209.7          43.9                8.3 +/-    0.84      11.3 +/-    0.84  0.060 / 0.060
G06     108.0          79.0                8.9 +/-    0.58       9.0 +/-    0.58  0.110 / 0.060
G12     315.0          28.9                5.4 +/-    1.57       9.7 +/-    1.57  0.090 / 0.090
G17     48.6           38.6                6.8 +/-    1.27      10.1 +/-    1.27  0.060 / 0.110
G19     16.1           59.9                7.1 +/-    0.87       8.1 +/-    0.87  0.030 / 0.030
G24     278.3          43.3                7.2 +/-    1.20       9.9 +/-    1.20  0.030 / 0.030
G28     113.7          23.0                8.2 +/-    2.12      16.8 +/-    2.12  0.050 / 0.030