PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/28-21:57:50
G05     47.5           23.3                9.3 +/-    0.78      18.9 +/-    0.78  0.280 / 0.420
G10     235.1          10.0              -15.8 +/-   30.22     -44.0 +/-   30.22  0.220 / 0.340
G13     80.3           37.5               11.9 +/-    0.84      18.0 +/-    0.84  0.060 / 0.080
G15     128.8          50.6               14.1 +/-    0.67      17.7 +/-    0.67  0.040 / 0.080
G18     243.5          40.2               14.6 +/-    0.72      21.1 +/-    0.72  0.110 / 0.300
G20     27.2           67.5               12.4 +/-    0.53      13.3 +/-    0.53  0.100 / 0.340
G21     311.4          46.3               12.4 +/-    0.95      16.3 +/-    0.95  0.070 / 0.140
G25     197.3          10.1               16.7 +/-    4.24      46.5 +/-    4.24  0.060 / 0.160
G26     292.2          19.6               13.3 +/-    1.62      29.6 +/-    1.62  0.030 / 0.050
G29     152.4          71.1               13.6 +/-    1.08      14.2 +/-    1.08  0.020 / 0.040