PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/17-08:12:30
G07     346.1          62.3                4.7 +/-    0.55       5.3 +/-    0.55  0.070 / 0.060
G08     83.1           51.7                6.4 +/-    0.73       7.9 +/-    0.73  0.060 / 0.080
G09     176.3          61.0                6.7 +/-    1.16       7.5 +/-    1.16  0.040 / 0.050
G11     139.8          18.5                5.3 +/-    1.68      12.1 +/-    1.68  0.040 / 0.050
G23     158.1          35.0                6.8 +/-    1.89      10.8 +/-    1.89  0.060 / 0.090
G27     49.5           28.3                2.3 +/-    0.65       4.2 +/-    0.65  0.060 / 0.100
G28     243.1          34.4                8.1 +/-    0.84      13.1 +/-    0.84  0.040 / 0.090
G30     306.9          38.7                3.8 +/-    0.46       5.7 +/-    0.46  0.050 / 0.090