PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-17:27:50
G07     353.9          63.8               12.3 +/-    0.60      13.5 +/-    0.60  0.070 / 0.100
G08     88.6           52.1               13.7 +/-    0.59      16.9 +/-    0.59  0.070 / 0.080
G09     188.0          69.2               12.8 +/-    1.45      13.5 +/-    1.45  0.040 / 0.050
G11     141.2          17.5               13.9 +/-    1.64      32.5 +/-    1.64  0.040 / 0.050
G23     157.2          36.3               14.4 +/-    1.14      22.2 +/-    1.14  0.070 / 0.080
G27     51.7           30.1               11.9 +/-    1.16      20.9 +/-    1.16  0.070 / 0.090
G28     239.9          29.4               14.1 +/-    2.74      24.9 +/-    2.74  0.040 / 0.030
G30     307.1          40.1               11.0 +/-    1.10      16.0 +/-    1.10  0.030 / 0.040