PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/23-17:42:30
G02     37.0           51.6                8.8 +/-    0.53      10.8 +/-    0.53  0.040 / 0.050
G05     125.4          67.4               10.6 +/-    0.46      11.4 +/-    0.46  0.030 / 0.050
G12     191.8          60.1               10.5 +/-    1.50      11.9 +/-    1.50  0.040 / 0.060
G25     285.5          56.5                8.8 +/-    1.00      10.3 +/-    1.00  0.040 / 0.060
G29     312.3          33.5                8.5 +/-    1.36      13.9 +/-    1.36  0.030 / 0.030