PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/12-08:42:30
G08     306.2          20.7                3.4 +/-    2.07       7.3 +/-    2.07  0.050 / 0.050
G10     341.1          61.2                3.9 +/-    0.37       4.4 +/-    0.37  0.040 / 0.050
G14     219.6          34.8                7.5 +/-    1.59      11.9 +/-    1.59  0.110 / 0.160
G20     44.4           58.7                5.7 +/-    0.84       6.6 +/-    0.84  0.130 / 0.150
G21     137.5          51.6                8.1 +/-    0.95      10.1 +/-    0.95  0.090 / 0.090
G24     68.7           29.0                4.4 +/-    1.42       7.9 +/-    1.42  0.150 / 0.060
G27     272.5          36.6                7.1 +/-    1.91      10.9 +/-    1.91  0.030 / 0.030
G32     225.8          49.8                7.7 +/-    2.44       9.8 +/-    2.44  0.030 / 0.030