PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/21-02:57:30
G02     35.4           53.6                5.3 +/-    0.58       6.4 +/-    0.58  0.050 / 0.040
G05     133.9          63.3                8.3 +/-    0.54       9.2 +/-    0.54  0.050 / 0.040
G06     54.3           15.2                2.9 +/-    2.23       7.1 +/-    2.23  0.030 / 0.040
G12     198.9          67.2                7.0 +/-    0.51       7.6 +/-    0.51  0.030 / 0.040
G19     100.5          10.0                4.6 +/-    1.77      12.8 +/-    1.77  0.100 / 0.070
G25     296.7          53.2                6.4 +/-    0.75       7.8 +/-    0.75  0.120 / 0.060
G29     307.8          28.2                3.1 +/-    0.76       5.6 +/-    0.76  0.040 / 0.050