PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/31-10:42:30
G07     13.6           67.1                3.1 +/-    0.64       3.3 +/-    0.64  0.040 / 0.050
G08     66.3           48.3                3.1 +/-    0.70       3.9 +/-    0.70  0.060 / 0.060
G09     177.2          51.2                5.5 +/-    0.94       6.8 +/-    0.94  0.030 / 0.040
G11     130.8          24.5                4.6 +/-    1.41       9.0 +/-    1.41  0.030 / 0.040
G23     160.2          24.9                4.4 +/-    2.18       8.7 +/-    2.18  0.030 / 0.050
G27     41.8           19.0                3.4 +/-    1.35       7.8 +/-    1.35  0.060 / 0.050
G28     255.0          43.3                5.5 +/-    1.23       7.5 +/-    1.23  0.060 / 0.170
G30     315.7          46.1                1.4 +/-    1.11       1.8 +/-    1.11  0.070 / 0.150