PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/18-09:12:30
G07     346.9          62.6                4.2 +/-    0.41       4.7 +/-    0.41  0.050 / 0.080
G08     97.3           54.0                5.5 +/-    0.78       6.7 +/-    0.78  0.050 / 0.100
G09     185.3          68.2                5.4 +/-    1.35       5.8 +/-    1.35  0.090 / 0.240
G11     142.8          17.3                3.5 +/-    1.03       8.2 +/-    1.03  0.090 / 0.210
G23     156.1          33.4                5.4 +/-    1.77       8.9 +/-    1.77  0.090 / 0.280
G27     50.9           29.0                2.8 +/-    1.04       5.0 +/-    1.04  0.090 / 0.250
G28     239.3          27.5                5.2 +/-    3.67       9.6 +/-    3.67  0.030 / 0.040
G30     306.0          38.7                3.9 +/-    1.42       5.9 +/-    1.42  0.040 / 0.050