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               13.6 +/-    2.19      22.6 +/-    2.19  0.030 / 0.050
G13     46.9           24.6               11.1 +/-    2.91      21.9 +/-    2.91  0.030 / 0.050
G15     76.5           57.6               12.3 +/-    0.72      14.3 +/-    0.72  0.140 / 0.350
G16     285.7          15.0               10.4 +/-    1.25      25.8 +/-    1.25  0.110 / 0.300
G20     258.5          19.1                6.2 +/-    2.25      14.0 +/-    2.25  0.090 / 0.160
G21     342.9          65.1               12.2 +/-    0.43      13.4 +/-    0.43  0.070 / 0.150
G26     258.8          12.1               15.6 +/-    1.82      41.5 +/-    1.82  0.030 / 0.040
G29     167.1          42.2               12.7 +/-    0.54      17.8 +/-    0.54  0.030 / 0.030