PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/08-18:27:30
G07     7.8            66.1               10.8 +/-    0.67      11.7 +/-    0.67  0.030 / 0.040
G08     76.3           51.2               10.9 +/-    0.93      13.6 +/-    0.93  0.030 / 0.040
G09     183.4          61.5               12.8 +/-    0.81      14.4 +/-    0.81  0.110 / 0.100
G11     136.3          22.0               13.6 +/-    2.15      28.5 +/-    2.15  0.110 / 0.110
G23     158.9          29.6               13.2 +/-    0.79      23.2 +/-    0.79  0.030 / 0.030
G27     46.6           25.8               10.4 +/-    2.23      20.0 +/-    2.23  0.040 / 0.030
G28     246.0          34.9               14.9 +/-    1.15      23.8 +/-    1.15  0.080 / 0.130
G30     312.6          44.6               11.0 +/-    0.53      14.9 +/-    0.53  0.100 / 0.100