PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/31-14:12:40
G01     46.1           21.9                6.4 +/-    2.71      13.5 +/-    2.71  0.070 / 0.160
G06     177.1          30.1                8.2 +/-    1.43      14.4 +/-    1.43  0.070 / 0.130
G13     247.5          27.4                6.1 +/-    2.39      11.4 +/-    2.39  0.060 / 0.060
G15     280.7          14.6                5.7 +/-    1.33      14.4 +/-    1.33  0.060 / 0.060
G17     349.2          75.3                7.3 +/-    0.39       7.5 +/-    0.39  0.200 / 0.280
G19     259.2          66.1                7.9 +/-    0.88       8.5 +/-    0.88  0.240 / 0.350
G24     319.1          10.9              -12.1 +/-   27.54     -33.2 +/-   27.54  0.190 / 0.150
G28     60.7           50.4                7.0 +/-    0.87       8.8 +/-    0.87  0.170 / 0.150
G30     152.1          37.7                8.0 +/-    0.88      12.1 +/-    0.88  0.020 / 0.020