PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/21-15:58:10
G02     13.3           67.9                6.4 +/-    0.56       6.8 +/-    0.56  0.030 / 0.020
G05     158.2          49.1                8.1 +/-    0.97      10.3 +/-    0.97  0.040 / 0.020
G06     48.0           24.2                5.6 +/-    2.26      11.1 +/-    2.26  0.040 / 0.040
G12     216.8          78.2                7.4 +/-    1.13       7.5 +/-    1.13  0.040 / 0.050
G19     88.3           20.7                7.1 +/-    1.31      15.3 +/-    1.31  0.070 / 0.070
G25     308.7          46.7                7.6 +/-    1.26      10.0 +/-    1.26  0.050 / 0.060
G29     298.5          18.9                7.3 +/-    1.82      16.5 +/-    1.82  0.060 / 0.110