PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/23-08:57:40
G10     258.4          32.3                7.5 +/-    1.95      12.5 +/-    1.95  0.130 / 0.310
G13     47.0           25.0                4.1 +/-    0.82       8.0 +/-    0.82  0.120 / 0.310
G15     69.0           53.3                5.9 +/-    0.46       7.2 +/-    0.46  0.130 / 0.180
G16     287.5          14.1                3.9 +/-    1.45      10.0 +/-    1.45  0.110 / 0.210
G20     36.7           55.1                4.0 +/-    0.53       4.7 +/-    0.53  0.030 / 0.050
G21     347.8          66.9                3.2 +/-    0.94       3.5 +/-    0.94  0.030 / 0.050
G26     259.3          11.8                6.0 +/-    1.62      16.1 +/-    1.62  0.040 / 0.050
G27     321.4          12.8                3.3 +/-    3.66       8.6 +/-    3.66  0.040 / 0.040
G29     166.5          39.7                7.7 +/-    0.65      11.3 +/-    0.65  0.060 / 0.210