PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/21-07:27:50
G07     325.7          55.3                3.0 +/-    0.91       3.5 +/-    0.91  0.090 / 0.120
G08     105.4          49.6                6.4 +/-    0.66       8.1 +/-    0.66  0.090 / 0.120
G09     182.0          75.5                5.2 +/-    0.67       5.4 +/-    0.67  0.040 / 0.060
G11     148.3          10.2               -5.4 +/-   14.06     -15.1 +/-   14.06  0.030 / 0.050
G16     45.3           10.4                2.5 +/-    3.58       6.8 +/-    3.58  0.050 / 0.070
G23     153.8          49.0                5.7 +/-    0.60       7.3 +/-    0.60  0.050 / 0.070
G27     62.2           35.1                3.7 +/-    0.75       5.8 +/-    0.75  0.030 / 0.070
G28     232.7          24.0                5.5 +/-    1.32      10.9 +/-    1.32  0.040 / 0.060
G30     296.5          29.9                4.9 +/-    1.75       8.6 +/-    1.75  0.120 / 0.400