PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/11-09:43:00
G07     357.1          64.5                3.6 +/-    0.59       3.9 +/-    0.59  0.060 / 0.090
G08     76.7           50.9                5.3 +/-    0.92       6.6 +/-    0.92  0.060 / 0.080
G09     178.9          59.3                7.4 +/-    1.10       8.5 +/-    1.10  0.030 / 0.040
G11     136.3          20.0                5.6 +/-    2.04      12.2 +/-    2.04  0.030 / 0.040
G23     159.0          31.9                6.6 +/-    1.16      11.1 +/-    1.16  0.060 / 0.080
G27     45.5           23.9                2.2 +/-    1.08       4.4 +/-    1.08  0.050 / 0.060
G28     247.7          38.5                7.6 +/-    0.96      11.3 +/-    0.96  0.030 / 0.050
G30     310.1          41.4                2.5 +/-    1.27       3.5 +/-    1.27  0.030 / 0.050