PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/13-07:12:50
G02     28.5           59.9                1.8 +/-    0.60       2.1 +/-    0.60  0.060 / 0.110
G05     148.0          55.7                5.5 +/-    0.45       6.5 +/-    0.45  0.060 / 0.110
G06     49.1           24.2                1.5 +/-    0.41       3.0 +/-    0.41  0.030 / 0.040
G12     222.3          76.1                2.5 +/-    0.99       2.5 +/-    0.99  0.030 / 0.040
G19     94.1           14.2                3.8 +/-    0.97       9.7 +/-    0.97  0.230 / 0.440
G20     200.0          14.4                2.8 +/-    3.73       7.0 +/-    3.73  0.140 / 0.480
G25     306.9          47.2                4.6 +/-    1.37       6.0 +/-    1.37  0.020 / 0.030
G29     302.6          23.8                2.5 +/-    1.60       5.0 +/-    1.60  0.020 / 0.030