PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/22-19:57:20
G02     249.9          75.6               14.7 +/-    0.41      15.1 +/-    0.41  0.030 / 0.030
G05     172.2          18.6               22.6 +/-    2.15      51.4 +/-    2.15  0.030 / 0.030
G06     40.3           52.7               13.1 +/-    0.71      16.0 +/-    0.71  0.030 / 0.030
G12     321.5          59.0               13.2 +/-    0.79      15.2 +/-    0.79  0.030 / 0.040
G17     76.9           16.9               11.7 +/-    1.52      27.9 +/-    1.52  0.150 / 0.240
G19     64.1           33.6               12.3 +/-    2.09      20.1 +/-    2.09  0.220 / 0.200
G25     317.6          21.1               13.3 +/-    1.68      28.4 +/-    1.68  0.130 / 0.140