PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/29-07:57:30
G08     295.8          22.9                4.7 +/-    0.62       9.7 +/-    0.62  0.070 / 0.090
G10     5.0            62.8                5.5 +/-    0.84       6.1 +/-    0.84  0.070 / 0.110
G14     227.4          45.0                5.9 +/-    1.57       8.0 +/-    1.57  0.060 / 0.090
G20     62.3           53.3                5.6 +/-    0.96       6.7 +/-    0.96  0.040 / 0.080
G21     145.2          41.4                6.5 +/-    0.65       9.2 +/-    0.65  0.030 / 0.020
G24     57.5           25.8                5.3 +/-    1.97      10.1 +/-    1.97  0.030 / 0.020
G27     258.7          33.1                4.9 +/-    1.99       8.0 +/-    1.99  0.100 / 0.100
G32     238.6          61.2                6.8 +/-    1.80       7.7 +/-    1.80  0.080 / 0.110