PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/12-15:12:40
G10     267.7          39.1                9.0 +/-    1.31      13.2 +/-    1.31  0.040 / 0.040
G13     41.5           17.5                4.8 +/-    1.67      11.3 +/-    1.67  0.040 / 0.040
G15     59.5           49.6                5.4 +/-    0.62       6.9 +/-    0.62  0.060 / 0.070
G16     280.1          11.9                4.6 +/-    3.32      12.3 +/-    3.32  0.060 / 0.090
G20     298.9          60.6                6.9 +/-    0.67       7.8 +/-    0.67  0.130 / 0.210
G21     14.8           73.2                6.9 +/-    0.81       7.1 +/-    0.81  0.110 / 0.200
G24     115.7          15.0                9.8 +/-    1.48      24.3 +/-    1.48  0.080 / 0.270
G27     319.5          17.2                4.7 +/-    1.67      11.2 +/-    1.67  0.090 / 0.260
G29     166.9          29.3                8.9 +/-    0.83      15.9 +/-    0.83  0.090 / 0.190