PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/09-16:42:50
G07     325.5          55.0                9.3 +/-    0.91      11.1 +/-    0.91  0.040 / 0.060
G08     111.5          50.5               12.9 +/-    1.07      16.2 +/-    1.07  0.040 / 0.050
G09     203.4          78.6                9.9 +/-    0.61      10.1 +/-    0.61  0.040 / 0.070
G11     149.7          10.0               -6.1 +/-   16.17     -17.0 +/-   16.17  0.040 / 0.080
G23     152.1          41.7               12.9 +/-    1.35      18.2 +/-    1.35  0.140 / 0.000
G27     59.5           33.7               10.1 +/-    0.70      16.5 +/-    0.70  0.150 / 0.510
G28     233.9          26.0               13.0 +/-    1.15      24.9 +/-    1.15  0.060 / 0.170
G30     298.8          32.8                9.1 +/-    1.35      15.1 +/-    1.35  0.130 / 0.210