PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/17-20:13:20
G02     38.3           50.5                6.0 +/-    1.19       7.5 +/-    1.19  0.040 / 0.050
G05     122.5          67.3                7.2 +/-    0.45       7.8 +/-    0.45  0.040 / 0.060
G06     57.6           10.2                6.0 +/-    1.72      16.8 +/-    1.72  0.030 / 0.050
G12     193.8          61.1                7.7 +/-    0.42       8.6 +/-    0.42  0.040 / 0.040
G25     285.6          56.6                4.7 +/-    3.13       5.5 +/-    3.13  0.170 / 0.410
G29     312.7          34.2                5.7 +/-    1.05       9.2 +/-    1.05  0.120 / 0.440