PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/20-09:43:00
G07     27.1           68.6                4.2 +/-    0.66       4.5 +/-    0.66  0.030 / 0.040
G08     66.2           50.7                3.6 +/-    0.67       4.6 +/-    0.67  0.020 / 0.040
G09     179.3          48.7                6.6 +/-    0.87       8.5 +/-    0.87  0.100 / 0.160
G11     130.0          29.1                5.1 +/-    0.88       9.1 +/-    0.88  0.150 / 0.210
G18     112.8          10.8               -0.8 +/-   19.73      -2.2 +/-   19.73  0.050 / 0.100
G23     159.2          16.1                4.6 +/-    0.94      11.2 +/-    0.94  0.050 / 0.120
G27     40.2           16.7                1.7 +/-    1.17       4.1 +/-    1.17  0.090 / 0.200
G28     255.5          40.3                4.9 +/-    0.99       7.2 +/-    0.99  0.140 / 0.220
G30     320.7          51.3                5.3 +/-    1.41       6.6 +/-    1.41  0.130 / 0.370