PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/31-17:12:30
G02     240.1          73.8                7.7 +/-    0.34       8.0 +/-    0.34  0.280 / 0.390
G05     172.0          15.6                7.5 +/-    1.86      18.4 +/-    1.86  0.370 / 0.560
G06     40.5           58.1                7.8 +/-    0.43       9.0 +/-    0.43  0.030 / 0.040
G12     321.1          50.6                6.9 +/-    0.43       8.7 +/-    0.43  0.030 / 0.040
G17     68.5           25.3                6.9 +/-    1.65      13.3 +/-    1.65  0.070 / 0.120
G19     57.5           37.3                5.9 +/-    2.25       8.9 +/-    2.25  0.070 / 0.130
G24     246.2          34.7               10.5 +/-    2.52      16.7 +/-    2.52  0.060 / 0.060
G25     316.2          11.1              -10.4 +/-   31.94     -28.4 +/-   31.94  0.070 / 0.070