PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-22:27:30
G02     201.1          27.7               17.6 +/-    1.66      32.4 +/-    1.66  0.070 / 0.110
G06     171.2          58.6               13.8 +/-    0.52      15.9 +/-    0.52  0.070 / 0.100
G17     29.6           54.1               10.8 +/-    1.17      13.0 +/-    1.17  0.030 / 0.030
G19     343.3          69.1               10.2 +/-    0.55      10.8 +/-    0.55  0.040 / 0.030
G24     304.0          34.8               10.0 +/-    2.95      15.9 +/-    2.95  0.040 / 0.030
G28     92.2           39.5               12.6 +/-    1.56      18.5 +/-    1.56  0.040 / 0.040