PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/31-19:27:40
G07     39.7           68.2               12.1 +/-    0.74      13.0 +/-    0.74  0.030 / 0.040
G08     58.7           45.3               11.8 +/-    1.11      15.8 +/-    1.11  0.040 / 0.040
G09     180.0          47.6               14.0 +/-    0.91      18.2 +/-    0.91  0.080 / 0.090
G11     126.2          30.2               15.1 +/-    1.43      26.3 +/-    1.43  0.100 / 0.090
G18     109.6          11.8               13.3 +/-    1.06      35.6 +/-    1.06  0.070 / 0.050
G23     160.6          17.5               13.4 +/-    1.90      31.5 +/-    1.90  0.070 / 0.050
G27     40.1           16.6                9.0 +/-    2.51      21.5 +/-    2.51  0.120 / 0.190
G28     259.2          43.7               14.6 +/-    2.27      20.0 +/-    2.27  0.160 / 0.190
G30     323.6          53.7               11.6 +/-    0.67      14.0 +/-    0.67  0.050 / 0.040