PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-23:57:40
G02     349.2          77.9                9.8 +/-    0.88      10.0 +/-    0.88  0.060 / 0.110
G05     162.8          35.1               16.8 +/-    1.35      26.6 +/-    1.35  0.060 / 0.120
G06     42.0           38.8                8.1 +/-    0.69      12.0 +/-    0.69  0.030 / 0.030
G12     309.7          72.6               10.2 +/-    0.49      10.6 +/-    0.49  0.040 / 0.040
G17     85.6           13.5               12.2 +/-    0.99      31.6 +/-    0.99  0.120 / 0.170
G19     75.0           28.1               10.9 +/-    0.90      19.8 +/-    0.90  0.130 / 0.160
G24     227.5          22.1               17.2 +/-    1.45      36.0 +/-    1.45  0.020 / 0.040
G25     317.2          28.9                8.2 +/-    1.17      14.7 +/-    1.17  0.020 / 0.040