PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/17-16:43:10
G02     54.3           37.2                7.3 +/-    0.75      11.1 +/-    0.75  0.040 / 0.060
G05     69.3           66.9                7.7 +/-    0.67       8.3 +/-    0.67  0.040 / 0.060
G12     184.4          37.7               10.0 +/-    1.17      15.0 +/-    1.17  0.170 / 0.440
G13     130.5          11.6               11.7 +/-    4.65      31.5 +/-    4.65  0.170 / 0.440
G21     267.4          13.4                7.2 +/-   14.16      18.6 +/-   14.16  0.130 / 0.340
G25     246.4          55.1                8.5 +/-    0.82      10.1 +/-    0.82  0.100 / 0.430
G29     325.0          49.3                7.6 +/-    1.37       9.7 +/-    1.37  0.080 / 0.090