PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/18-20:58:00
G02     34.1           54.6               10.4 +/-    0.67      12.4 +/-    0.67  0.030 / 0.030
G05     133.8          64.3               12.0 +/-    0.36      13.2 +/-    0.36  0.030 / 0.040
G06     55.7           12.4                8.7 +/-    1.73      23.0 +/-    1.73  0.110 / 0.130
G12     190.3          62.6               11.7 +/-    0.81      13.0 +/-    0.81  0.140 / 0.190
G19     101.2          10.5               11.7 +/-    1.98      32.3 +/-    1.98  0.050 / 0.050
G25     292.5          55.3               12.2 +/-    2.91      14.5 +/-    2.91  0.050 / 0.050
G29     308.5          28.7                9.2 +/-    1.52      16.5 +/-    1.52  0.040 / 0.030