PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/21-17:43:10
G02     34.1           54.0                9.5 +/-    0.84      11.4 +/-    0.84  0.030 / 0.050
G05     133.0          65.3               11.7 +/-    0.86      12.8 +/-    0.86  0.040 / 0.050
G06     56.0           11.7                7.5 +/-    2.63      20.0 +/-    2.63  0.040 / 0.060
G12     194.2          63.7                8.6 +/-    0.69       9.5 +/-    0.69  0.040 / 0.060
G25     291.2          55.1                8.7 +/-    0.84      10.3 +/-    0.84  0.240 / 0.230
G29     310.1          31.1                9.6 +/-    1.24      16.4 +/-    1.24  0.190 / 0.330