PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/06-17:28:00
G07     349.0          63.1                8.9 +/-    0.78       9.9 +/-    0.78  0.030 / 0.050
G08     85.3           53.9               13.0 +/-    0.62      15.6 +/-    0.62  0.030 / 0.060
G09     183.5          62.7               12.6 +/-    1.11      14.0 +/-    1.11  0.030 / 0.040
G11     140.0          19.5               14.8 +/-    2.07      33.0 +/-    2.07  0.040 / 0.050
G23     156.6          26.2               13.5 +/-    1.19      25.7 +/-    1.19  0.040 / 0.120
G27     46.4           25.2               10.2 +/-    1.31      19.9 +/-    1.31  0.050 / 0.160
G28     246.6          37.7               12.9 +/-    1.70      19.5 +/-    1.70  0.110 / 0.330
G30     311.2          43.1                7.5 +/-    0.84      10.4 +/-    0.84  0.130 / 0.370