PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/15-21:42:30
G05     46.8           22.7                5.3 +/-    0.98      11.0 +/-    0.98  0.050 / 0.140
G13     84.0           36.1                9.1 +/-    1.05      14.2 +/-    1.05  0.050 / 0.150
G15     138.2          46.7               10.7 +/-    0.95      14.1 +/-    0.95  0.050 / 0.090
G16     318.1          10.9               -5.1 +/-   15.23     -13.9 +/-   15.23  0.040 / 0.090
G20     237.4          3.0                12.2 +/-    1.97      37.9 +/-    1.97  0.130 / 0.580
G21     306.3          41.9                7.1 +/-    1.19       9.9 +/-    1.19  0.130 / 0.590
G25     202.0          15.7               17.6 +/-    2.00      43.0 +/-    2.00  0.100 / 0.250
G26     292.6          21.1               10.1 +/-    2.04      21.7 +/-    2.04  0.180 / 0.270
G29     147.5          81.3                7.1 +/-    0.84       7.2 +/-    0.84  0.070 / 0.110