PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/23-20:27:40
G02     29.7           58.1                9.1 +/-    0.72      10.6 +/-    0.72  0.030 / 0.030
G05     141.8          60.8               10.6 +/-    0.37      11.9 +/-    0.37  0.020 / 0.030
G06     53.4           15.4                6.4 +/-    1.95      15.8 +/-    1.95  0.060 / 0.050
G12     193.1          67.2                9.3 +/-    0.62      10.0 +/-    0.62  0.050 / 0.060
G19     97.7           13.2                9.6 +/-    1.30      25.0 +/-    1.30  0.030 / 0.030
G25     298.9          52.8                8.4 +/-    1.60      10.2 +/-    1.60  0.030 / 0.030
G29     305.6          25.6                8.9 +/-    0.73      17.2 +/-    0.73  0.110 / 0.190