PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/21-17:42:40
G02     33.7           54.3                8.4 +/-    1.21      10.1 +/-    1.21  0.120 / 0.140
G05     133.9          65.0               10.2 +/-    0.52      11.1 +/-    0.52  0.150 / 0.180
G06     55.7           12.1                6.3 +/-    2.43      16.8 +/-    2.43  0.060 / 0.050
G12     194.6          64.2                8.3 +/-    1.00       9.1 +/-    1.00  0.040 / 0.060
G25     291.9          54.9                8.5 +/-    1.32      10.2 +/-    1.32  0.040 / 0.030
G29     309.8          30.7                9.1 +/-    0.55      15.6 +/-    0.55  0.030 / 0.040