PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-18:27:50
G01     115.6          19.7               11.7 +/-    1.99      26.0 +/-    1.99  0.030 / 0.050
G07     96.3           58.9               10.6 +/-    0.46      12.2 +/-    0.46  0.030 / 0.050
G08     43.6           28.1                7.6 +/-    0.75      13.9 +/-    0.75  0.080 / 0.260
G09     177.2          24.0               10.1 +/-    1.93      20.1 +/-    1.93  0.080 / 0.280
G11     100.7          41.6               12.1 +/-    0.70      17.2 +/-    0.70  0.040 / 0.080
G13     315.6          22.8                7.1 +/-    2.60      14.6 +/-    2.60  0.040 / 0.060
G17     201.8          28.2               12.3 +/-    1.81      22.3 +/-    1.81  0.050 / 0.090
G18     88.5           21.8               10.1 +/-    1.00      21.2 +/-    1.00  0.050 / 0.120
G28     291.5          55.8               10.3 +/-    0.51      12.1 +/-    0.51  0.100 / 0.210
G30     358.2          72.7               10.1 +/-    0.68      10.5 +/-    0.68  0.080 / 0.180