PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/20-18:42:30
G02     32.8           55.6               10.2 +/-    0.72      12.0 +/-    0.72  0.030 / 0.040
G05     135.6          64.1               11.7 +/-    0.80      12.9 +/-    0.80  0.030 / 0.030
G06     55.9           11.9                8.8 +/-    1.96      23.5 +/-    1.96  0.030 / 0.050
G12     187.8          61.4               11.9 +/-    1.68      13.4 +/-    1.68  0.040 / 0.040
G19     100.9          11.1               10.1 +/-    1.23      27.6 +/-    1.23  0.100 / 0.130
G25     291.8          55.8                9.2 +/-    0.85      10.9 +/-    0.85  0.120 / 0.160
G29     308.4          28.6                9.4 +/-    1.71      17.0 +/-    1.71  0.040 / 0.050