PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/27-18:27:30
G02     239.0          73.5               14.1 +/-    0.45      14.7 +/-    0.45  0.100 / 0.180
G05     172.0          15.8               19.7 +/-    1.41      48.1 +/-    1.41  0.100 / 0.230
G06     41.0           56.7               12.4 +/-    0.44      14.5 +/-    0.44  0.040 / 0.060
G12     322.6          55.5               11.2 +/-    1.13      13.3 +/-    1.13  0.040 / 0.060
G17     70.9           22.1               10.7 +/-    0.94      22.4 +/-    0.94  0.030 / 0.050
G19     54.3           41.4               11.8 +/-    0.69      16.8 +/-    0.69  0.030 / 0.040
G24     243.9          34.8               16.8 +/-    0.97      26.8 +/-    0.97  0.120 / 0.350
G25     316.6          12.4               10.6 +/-    1.51      28.1 +/-    1.51  0.160 / 0.340