PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/21-16:12:30
G02     22.1           63.0                7.2 +/-    0.56       8.0 +/-    0.56  0.020 / 0.030
G05     152.8          55.5                8.2 +/-    0.58       9.7 +/-    0.58  0.030 / 0.030
G06     51.0           19.3                5.8 +/-    2.34      12.9 +/-    2.34  0.040 / 0.040
G12     199.7          72.2                7.4 +/-    0.77       7.7 +/-    0.77  0.030 / 0.040
G19     93.7           16.9                7.1 +/-    1.17      17.0 +/-    1.17  0.060 / 0.060
G25     302.4          51.6                8.4 +/-    4.64      10.4 +/-    4.64  0.040 / 0.060
G29     302.9          23.2                7.4 +/-    0.99      15.1 +/-    0.99  0.110 / 0.250