PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/25-19:27:50
G02     58.0           35.0               10.6 +/-    0.88      16.9 +/-    0.88  0.030 / 0.040
G05     58.7           61.8               13.1 +/-    0.85      14.7 +/-    0.85  0.030 / 0.030
G12     181.2          28.9               15.3 +/-    2.05      27.4 +/-    2.05  0.120 / 0.460
G13     127.8          15.2               16.8 +/-    2.20      41.5 +/-    2.20  0.120 / 0.450
G15     166.7          10.5               -4.9 +/-   33.77     -13.4 +/-   33.77  0.140 / 0.310
G21     270.9          16.3               15.9 +/-    2.02      38.2 +/-    2.02  0.130 / 0.210
G25     234.9          51.8               12.0 +/-    1.88      14.8 +/-    1.88  0.060 / 0.110
G29     327.3          53.1               10.2 +/-    1.07      12.4 +/-    1.07  0.040 / 0.120