PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/17-16:42:40
G02     324.8          79.3                6.6 +/-    0.73       6.7 +/-    0.73  0.030 / 0.050
G05     165.5          31.8                9.2 +/-    1.01      15.5 +/-    1.01  0.030 / 0.040
G06     41.1           40.3                5.4 +/-    0.34       7.9 +/-    0.34  0.110 / 0.210
G12     313.6          69.6                6.7 +/-    1.14       7.1 +/-    1.14  0.110 / 0.190
G17     83.3           14.8                6.5 +/-    1.17      16.2 +/-    1.17  0.030 / 0.040
G19     74.5           26.2                8.1 +/-    0.86      15.3 +/-    0.86  0.030 / 0.040
G24     230.0          23.4                8.8 +/-    2.83      17.9 +/-    2.83  0.100 / 0.240
G25     317.1          26.8                4.9 +/-    2.17       9.2 +/-    2.17  0.090 / 0.270