PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/09-07:58:10
G10     296.3          52.0                6.5 +/-    2.07       8.0 +/-    2.07  0.040 / 0.030
G14     209.4          11.1               -8.4 +/-    4.63     -22.7 +/-    4.63  0.040 / 0.030
G15     46.1           28.1                3.6 +/-    1.16       6.6 +/-    1.16  0.090 / 0.180
G20     349.8          65.3                5.5 +/-    0.57       6.0 +/-    0.57  0.090 / 0.180
G21     96.1           72.8                6.2 +/-    0.90       6.5 +/-    0.90  0.200 / 0.470
G24     97.7           25.9                7.2 +/-    1.37      13.9 +/-    1.37  0.070 / 0.070
G27     303.6          32.5                6.0 +/-    1.56       9.9 +/-    1.56  0.070 / 0.060
G32     210.8          25.5                6.8 +/-    3.15      13.2 +/-    3.15  0.060 / 0.110