PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/17-20:57:30
G02     32.4           56.0                9.9 +/-    0.64      11.7 +/-    0.64  0.030 / 0.050
G05     137.3          62.9               11.2 +/-    0.96      12.5 +/-    0.96  0.030 / 0.040
G06     54.7           13.7                7.2 +/-    1.31      18.5 +/-    1.31  0.040 / 0.050
G12     191.6          64.7               10.0 +/-    0.58      11.0 +/-    0.58  0.040 / 0.070
G19     99.7           11.6               11.5 +/-    2.34      31.0 +/-    2.34  0.040 / 0.050
G25     295.4          54.2                9.2 +/-    0.64      11.0 +/-    0.64  0.030 / 0.050
G29     307.3          27.4                6.9 +/-    1.17      12.8 +/-    1.17  0.050 / 0.060