PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/21-00:58:10
G02     36.1           52.9                8.7 +/-    0.78      10.6 +/-    0.78  0.030 / 0.040
G05     131.0          64.5               11.7 +/-    0.68      12.8 +/-    0.68  0.030 / 0.040
G06     55.4           13.3                6.0 +/-    1.18      15.5 +/-    1.18  0.030 / 0.040
G12     195.1          64.6                9.4 +/-    0.97      10.3 +/-    0.97  0.030 / 0.040
G25     293.8          54.4                9.8 +/-    0.60      11.8 +/-    0.60  0.050 / 0.070
G29     308.7          29.0                8.3 +/-    2.17      14.8 +/-    2.17  0.050 / 0.070