PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/08-18:27:30
G02     229.9          68.7               11.9 +/-    0.69      12.7 +/-    0.69  0.050 / 0.040
G06     42.5           62.4               10.9 +/-    0.37      12.1 +/-    0.37  0.040 / 0.040
G12     321.7          48.9               11.2 +/-    0.45      14.4 +/-    0.45  0.030 / 0.050
G17     69.4           22.4                9.0 +/-    1.71      18.6 +/-    1.71  0.030 / 0.050
G19     55.1           39.4               10.5 +/-    0.92      15.4 +/-    0.92  0.140 / 0.220
G24     252.0          37.3               12.9 +/-    2.20      19.7 +/-    2.20  0.160 / 0.350
G25     316.2          13.4               10.7 +/-    1.96      27.7 +/-    1.96  0.060 / 0.070