PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/23-21:43:10
G10     269.8          39.1               18.0 +/-    1.24      26.6 +/-    1.24  0.110 / 0.210
G13     41.3           17.7               11.9 +/-    1.33      27.7 +/-    1.33  0.120 / 0.230
G15     56.6           46.8               14.3 +/-    0.66      18.7 +/-    0.66  0.040 / 0.040
G16     280.2          10.3               16.2 +/-    2.68      44.7 +/-    2.68  0.040 / 0.050
G18     307.3          65.3               13.6 +/-    0.81      14.8 +/-    0.81  0.100 / 0.470
G20     56.6           32.5               11.7 +/-    0.72      19.4 +/-    0.72  0.090 / 0.560
G21     15.6           74.1               14.8 +/-    0.83      15.4 +/-    0.83  0.050 / 0.110
G24     119.2          15.5               18.9 +/-    1.79      46.3 +/-    1.79  0.050 / 0.110
G27     316.4          22.4               10.9 +/-    1.63      22.6 +/-    1.63  0.070 / 0.170
G29     166.5          24.2               17.0 +/-    2.50      33.8 +/-    2.50  0.080 / 0.130