PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/16-18:27:50
G07     48.3           67.8               13.0 +/-    1.05      13.9 +/-    1.05  0.030 / 0.030
G08     56.3           44.0               13.4 +/-    1.14      18.3 +/-    1.14  0.040 / 0.040
G09     179.8          45.1               15.2 +/-    0.84      20.5 +/-    0.84  0.080 / 0.110
G11     124.1          31.8               13.5 +/-    1.53      22.8 +/-    1.53  0.120 / 0.110
G18     107.8          13.1               12.9 +/-    2.41      33.6 +/-    2.41  0.160 / 0.260
G23     160.6          14.6               12.9 +/-    2.04      32.3 +/-    2.04  0.290 / 0.280
G27     39.2           14.5                9.4 +/-    3.40      23.6 +/-    3.40  0.070 / 0.060
G28     261.9          45.1               14.2 +/-    3.10      19.1 +/-    3.10  0.060 / 0.050
G30     326.7          56.1               12.3 +/-    0.53      14.5 +/-    0.53  0.040 / 0.040