PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/26-13:42:50
G01     127.7          10.9                4.2 +/-   18.19      11.5 +/-   18.19  0.050 / 0.060
G07     57.6           67.7                5.6 +/-    0.88       6.0 +/-    0.88  0.060 / 0.070
G08     50.6           38.7                4.3 +/-    8.02       6.3 +/-    8.02  0.030 / 0.030
G09     176.8          36.0                6.3 +/-    1.87       9.8 +/-    1.87  0.030 / 0.030
G11     116.3          33.4                7.3 +/-    7.67      11.9 +/-    7.67  0.190 / 0.380
G17     199.1          15.9                7.5 +/-    5.52      18.2 +/-    5.52  0.190 / 0.390
G23     161.0          10.1                5.1 +/-    4.26      14.1 +/-    4.26  0.040 / 0.040
G28     274.6          52.1               -0.1 +/-   30.32      -0.1 +/-   30.32  0.040 / 0.030
G30     328.9          57.2                4.3 +/-    0.51       5.0 +/-    0.51  0.260 / 0.420