PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/18-15:57:40
G02     238.1          72.4                9.3 +/-    0.71       9.7 +/-    0.71  0.060 / 0.080
G05     172.7          14.7               11.4 +/-    2.16      28.6 +/-    2.16  0.080 / 0.100
G06     40.7           58.4                9.9 +/-    0.43      11.4 +/-    0.43  0.040 / 0.040
G12     321.2          50.6                9.1 +/-    0.64      11.4 +/-    0.64  0.040 / 0.040
G17     68.0           25.6                8.8 +/-    1.19      16.9 +/-    1.19  0.040 / 0.040
G19     57.0           37.6                9.5 +/-    1.86      14.4 +/-    1.86  0.040 / 0.030
G24     247.1          35.1               11.6 +/-    2.22      18.5 +/-    2.22  0.050 / 0.050
G25     316.0          10.5              -16.4 +/-   18.28     -45.1 +/-   18.28  0.050 / 0.060