PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/20-19:42:30
G07     3.1            65.6               12.7 +/-    0.57      13.8 +/-    0.57  0.030 / 0.030
G08     77.7           51.2               13.5 +/-    0.49      16.8 +/-    0.49  0.030 / 0.030
G09     183.6          62.7               13.4 +/-    0.90      14.9 +/-    0.90  0.030 / 0.030
G11     137.1          21.2               13.8 +/-    2.78      29.5 +/-    2.78  0.030 / 0.030
G23     158.9          31.5               12.1 +/-    0.89      20.5 +/-    0.89  0.150 / 0.140
G27     47.6           26.8               10.8 +/-    2.60      20.2 +/-    2.60  0.060 / 0.150
G28     245.0          34.2               12.5 +/-    1.19      20.2 +/-    1.19  0.140 / 0.130
G30     311.1          43.1               11.8 +/-    1.07      16.4 +/-    1.07  0.110 / 0.150