PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/14-08:57:30
G08     269.4          17.5                6.8 +/-    2.83      16.0 +/-    2.83  0.060 / 0.060
G10     62.6           58.2                4.5 +/-    1.03       5.2 +/-    1.03  0.060 / 0.060
G11     311.8          16.7               -5.5 +/-    6.92     -13.2 +/-    6.92  0.260 / 0.280
G14     262.9          62.5                5.6 +/-    0.60       6.2 +/-    0.60  0.270 / 0.340
G18     312.3          31.7                4.1 +/-    1.14       6.9 +/-    1.14  0.150 / 0.440
G20     104.0          16.1                4.9 +/-    1.68      12.0 +/-    1.68  0.210 / 0.390
G21     154.9          14.8                6.5 +/-    2.29      16.2 +/-    2.29  0.140 / 0.170
G27     230.8          15.1                7.0 +/-    2.15      17.3 +/-    2.15  0.120 / 0.170
G31     176.5          33.1                6.3 +/-    2.96      10.4 +/-    2.96  0.160 / 0.260
G32     348.4          73.2                6.0 +/-    0.35       6.3 +/-    0.35  0.160 / 0.270