PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/28-08:28:10
G07     352.1          63.4                6.3 +/-    0.35       6.9 +/-    0.35  0.070 / 0.080
G08     80.4           51.4                7.3 +/-    0.85       9.1 +/-    0.85  0.050 / 0.110
G09     180.5          62.3                9.5 +/-    1.40      10.5 +/-    1.40  0.040 / 0.030
G11     138.1          18.7                9.5 +/-    1.68      21.6 +/-    1.68  0.040 / 0.040
G23     158.6          34.0               11.0 +/-    1.03      17.8 +/-    1.03  0.110 / 0.130
G27     46.9           25.3                4.6 +/-    2.10       8.9 +/-    2.10  0.070 / 0.090
G28     245.7          37.1               10.0 +/-    1.76      15.3 +/-    1.76  0.040 / 0.040
G30     308.7          40.3                6.3 +/-    1.68       9.2 +/-    1.68  0.040 / 0.040