PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/14-08:57:30
G02     68.0           24.7                4.0 +/-    0.46       7.9 +/-    0.46  0.030 / 0.040
G05     48.9           51.7                3.1 +/-    0.77       3.9 +/-    0.77  0.050 / 0.050
G12     184.2          24.5                5.1 +/-    1.54      10.0 +/-    1.54  0.150 / 0.220
G13     121.7          21.2                4.7 +/-    0.97      10.0 +/-    0.97  0.100 / 0.180
G15     157.5          20.1                5.3 +/-    1.51      11.6 +/-    1.51  0.090 / 0.110
G20     217.2          64.2                6.0 +/-    0.92       6.5 +/-    0.92  0.080 / 0.130
G21     279.5          24.7                3.6 +/-    2.20       7.1 +/-    2.20  0.080 / 0.110
G25     226.5          45.0                5.1 +/-    2.85       6.9 +/-    2.85  0.110 / 0.110
G29     336.2          65.0                4.2 +/-    0.99       4.6 +/-    0.99  0.050 / 0.050