PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/31-14:27:40
G01     101.0          28.1               10.4 +/-    1.41      19.0 +/-    1.41  0.040 / 0.040
G07     115.7          50.4               12.0 +/-    0.53      15.0 +/-    0.53  0.040 / 0.040
G08     41.6           13.9                7.1 +/-    3.25      18.2 +/-    3.25  0.030 / 0.020
G11     78.7           40.1               11.2 +/-    1.94      16.3 +/-    1.94  0.040 / 0.020
G13     306.5          30.3                9.5 +/-    1.31      16.5 +/-    1.31  0.080 / 0.140
G17     207.8          46.1               11.3 +/-    1.48      15.0 +/-    1.48  0.080 / 0.140
G19     210.5          19.7               12.2 +/-    1.81      27.0 +/-    1.81  0.040 / 0.050
G28     329.2          61.5               10.3 +/-    0.39      11.6 +/-    0.39  0.030 / 0.060
G30     38.4           79.7               10.9 +/-    0.51      11.1 +/-    0.51  0.070 / 0.110