PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/11-15:57:50
G01     40.2           14.5                7.7 +/-    1.17      19.4 +/-    1.17  0.140 / 0.250
G06     174.4          41.6               11.3 +/-    0.95      16.0 +/-    0.95  0.140 / 0.440
G13     237.8          20.8               10.9 +/-    1.02      23.5 +/-    1.02  0.080 / 0.210
G15     271.8          11.6               10.4 +/-    1.98      28.1 +/-    1.98  0.090 / 0.200
G17     11.7           67.0                9.1 +/-    0.75       9.8 +/-    0.75  0.070 / 0.150
G19     289.9          71.5                9.7 +/-    0.33      10.1 +/-    0.33  0.060 / 0.160
G24     316.6          19.4                9.7 +/-    2.81      21.7 +/-    2.81  0.030 / 0.040
G28     74.7           45.6               10.0 +/-    0.38      13.4 +/-    0.38  0.030 / 0.040
G30     155.5          27.4                9.7 +/-    1.16      17.9 +/-    1.16  0.140 / 0.240