PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/15-08:57:40
G08     294.1          23.2                5.9 +/-    1.24      12.0 +/-    1.24  0.040 / 0.080
G10     7.5            62.8                4.4 +/-    1.27       4.9 +/-    1.27  0.050 / 0.090
G14     228.5          46.3                8.6 +/-    2.50      11.3 +/-    2.50  0.070 / 0.100
G18     317.6          10.7              -10.0 +/-   12.43     -27.4 +/-   12.43  0.090 / 0.100
G20     64.1           52.6                6.4 +/-    1.30       7.9 +/-    1.30  0.030 / 0.030
G21     145.8          39.6                8.0 +/-    2.17      11.7 +/-    2.17  0.040 / 0.030
G24     56.1           25.1                5.1 +/-    3.04       9.9 +/-    3.04  0.030 / 0.030
G27     257.5          32.5                6.1 +/-    1.98      10.2 +/-    1.98  0.030 / 0.020
G32     239.9          61.0                7.4 +/-    1.49       8.3 +/-    1.49  0.060 / 0.110