PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/18-05:13:10
G02     232.1          74.4                4.6 +/-    0.60       4.8 +/-    0.60  0.210 / 0.270
G05     172.6          13.2                4.0 +/-    2.48      10.5 +/-    2.48  0.200 / 0.220
G06     42.2           65.3                3.8 +/-    0.50       4.2 +/-    0.50  0.030 / 0.030
G12     321.0          46.2                4.2 +/-    0.85       5.5 +/-    0.85  0.030 / 0.030
G17     66.9           26.2                2.2 +/-    2.04       4.2 +/-    2.04  0.080 / 0.100
G19     53.2           41.0                2.6 +/-    2.20       3.7 +/-    2.20  0.080 / 0.090
G24     251.0          37.1                4.8 +/-    0.96       7.3 +/-    0.96  0.030 / 0.050