PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/10-10:28:00
G07     45.5           68.7                3.4 +/-    0.67       3.6 +/-    0.67  0.140 / 0.230
G08     53.1           41.2                2.2 +/-    0.66       3.1 +/-    0.66  0.170 / 0.230
G09     176.6          38.8                4.1 +/-    0.82       6.1 +/-    0.82  0.040 / 0.040
G11     120.6          31.8                3.0 +/-    1.03       5.0 +/-    1.03  0.030 / 0.030
G17     198.8          12.9                2.6 +/-    1.63       6.9 +/-    1.63  0.030 / 0.020
G23     161.2          13.4                2.2 +/-    1.22       5.8 +/-    1.22  0.030 / 0.030
G27     37.7           9.8                 0.6 +/-    3.55       1.8 +/-    3.55  0.060 / 0.050
G28     270.2          50.7                2.5 +/-    2.60       3.1 +/-    2.60  0.050 / 0.050
G30     326.6          55.4                2.1 +/-    0.46       2.5 +/-    0.46  0.110 / 0.450