PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/16-08:12:30
G07     342.7          61.3                3.5 +/-    0.64       3.9 +/-    0.64  0.050 / 0.030
G08     86.4           51.8                4.3 +/-    1.10       5.3 +/-    1.10  0.030 / 0.040
G09     176.7          63.1                6.5 +/-    0.93       7.2 +/-    0.93  0.100 / 0.110
G11     141.1          17.2                4.6 +/-    1.13      10.9 +/-    1.13  0.080 / 0.100
G23     157.6          36.9                5.1 +/-    0.71       7.9 +/-    0.71  0.080 / 0.090
G27     51.0           29.5                3.8 +/-    1.03       6.7 +/-    1.03  0.090 / 0.080
G28     241.5          33.0                4.2 +/-    1.66       6.9 +/-    1.66  0.060 / 0.070
G30     305.4          37.4                4.3 +/-    1.15       6.5 +/-    1.15  0.050 / 0.080