PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/20-18:42:40
G02     32.8           55.6                9.0 +/-    1.38      10.7 +/-    1.38  0.030 / 0.030
G05     135.6          64.1               10.3 +/-    0.50      11.3 +/-    0.50  0.030 / 0.030
G06     55.9           11.9                8.8 +/-    1.68      23.7 +/-    1.68  0.040 / 0.050
G12     187.8          61.4               10.0 +/-    0.65      11.2 +/-    0.65  0.030 / 0.040
G19     100.9          11.1               10.9 +/-    2.54      29.7 +/-    2.54  0.040 / 0.050
G25     291.8          55.8                9.2 +/-    4.51      10.9 +/-    4.51  0.040 / 0.050
G29     308.4          28.6                9.0 +/-    0.98      16.2 +/-    0.98  0.080 / 0.130