PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/13-18:27:40
G07     32.4           68.0               11.5 +/-    0.51      12.3 +/-    0.51  0.030 / 0.040
G08     62.7           47.4               11.7 +/-    1.31      15.3 +/-    1.31  0.030 / 0.030
G09     180.8          51.2               13.0 +/-    0.91      16.1 +/-    0.91  0.090 / 0.090
G11     129.0          28.2               11.5 +/-    3.12      20.9 +/-    3.12  0.110 / 0.100
G18     112.5          10.2                1.4 +/-   31.81       4.0 +/-   31.81  0.180 / 0.190
G23     160.2          20.1               10.3 +/-    2.23      22.5 +/-    2.23  0.200 / 0.160
G27     41.3           18.9                9.0 +/-    1.32      20.4 +/-    1.32  0.050 / 0.050
G28     255.5          41.5               13.0 +/-    2.89      18.5 +/-    2.89  0.050 / 0.050
G30     321.1          51.7               10.9 +/-    0.59      13.4 +/-    0.59  0.040 / 0.050