PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/10/14-12:49:10
G02     227.0          66.7                6.9 +/-    1.78       7.4 +/-    1.78  0.070 / 0.080
G06     43.7           64.8                3.1 +/-    0.72       3.4 +/-    0.72  0.080 / 0.090
G12     321.4          47.0                4.3 +/-    1.75       5.6 +/-    1.75  0.040 / 0.050
G17     66.3           24.6                5.1 +/-    1.37      10.1 +/-    1.37  0.040 / 0.050
G19     46.2           46.1                4.5 +/-    0.99       6.0 +/-    0.99  0.020 / 0.030
G24     248.9          38.3                7.4 +/-    1.08      11.2 +/-    1.08  0.030 / 0.030