PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/30-21:57:50
G10     257.9          32.5               13.5 +/-    1.24      22.5 +/-    1.24  0.210 / 0.330
G13     46.9           24.6               10.6 +/-    0.95      21.0 +/-    0.95  0.180 / 0.310
G15     76.5           57.6               10.5 +/-    0.51      12.2 +/-    0.51  0.040 / 0.060
G16     285.7          15.0               10.9 +/-    2.13      27.2 +/-    2.13  0.040 / 0.050
G20     258.5          19.1                7.9 +/-    0.65      17.7 +/-    0.65  0.120 / 0.410
G21     342.9          65.1                9.7 +/-    0.94      10.6 +/-    0.94  0.130 / 0.460
G26     258.8          12.1               15.5 +/-    1.78      41.2 +/-    1.78  0.070 / 0.200
G27     321.9          11.3               -3.5 +/-   37.05      -9.6 +/-   37.05  0.070 / 0.220
G29     167.1          42.2               13.4 +/-    0.70      18.8 +/-    0.70  0.020 / 0.040