PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/28-10:43:10
G07     1.6            65.3                3.3 +/-    0.58       3.5 +/-    0.58  0.050 / 0.090
G08     73.9           50.3                4.4 +/-    0.92       5.6 +/-    0.92  0.050 / 0.100
G09     177.7          56.8                7.4 +/-    1.06       8.6 +/-    1.06  0.040 / 0.040
G11     134.7          21.2                4.7 +/-    1.48      10.0 +/-    1.48  0.040 / 0.050
G23     159.3          30.1                4.7 +/-    0.66       8.2 +/-    0.66  0.050 / 0.120
G27     44.5           22.7                2.0 +/-    1.10       4.2 +/-    1.10  0.060 / 0.110
G28     249.4          39.6                7.4 +/-    1.22      10.8 +/-    1.22  0.080 / 0.130
G30     311.3          42.3                3.4 +/-    0.92       4.8 +/-    0.92  0.060 / 0.140