PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/15-09:42:40
G08     272.8          20.5                6.5 +/-    1.98      14.0 +/-    1.98  0.110 / 0.260
G10     51.2           59.7                5.8 +/-    0.63       6.6 +/-    0.63  0.140 / 0.250
G14     254.7          63.2                6.1 +/-    0.71       6.7 +/-    0.71  0.060 / 0.050
G18     314.6          28.7                3.6 +/-    1.30       6.5 +/-    1.30  0.050 / 0.050
G20     89.4           40.4                6.1 +/-    0.74       8.8 +/-    0.74  0.030 / 0.020
G21     153.3          19.5                4.4 +/-    3.03       9.9 +/-    3.03  0.030 / 0.020
G24     41.8           13.1                2.2 +/-    3.29       5.8 +/-    3.29  0.030 / 0.030
G27     238.0          20.5                7.5 +/-    1.47      16.3 +/-    1.47  0.030 / 0.020
G31     180.1          23.4                7.0 +/-    2.23      14.1 +/-    2.23  0.140 / 0.250
G32     291.7          73.8                6.5 +/-    0.40       6.8 +/-    0.40  0.160 / 0.300