PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/12-12:57:30
G02     226.9          66.6                6.4 +/-    1.06       6.9 +/-    1.06  0.070 / 0.110
G06     43.8           64.8                4.6 +/-    0.47       5.0 +/-    0.47  0.070 / 0.090
G12     321.4          47.0                4.5 +/-    1.10       5.9 +/-    1.10  0.030 / 0.040
G17     66.2           24.7                5.1 +/-    0.97      10.0 +/-    0.97  0.040 / 0.040
G19     46.1           46.2                5.1 +/-    0.74       6.8 +/-    0.74  0.030 / 0.020
G24     249.0          38.3                8.1 +/-    0.89      12.1 +/-    0.89  0.030 / 0.030