PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/21-18:42:40
G10     301.7          53.9                8.3 +/-    1.20      10.0 +/-    1.20  0.060 / 0.080
G15     45.7           25.2                7.2 +/-    0.67      14.0 +/-    0.67  0.060 / 0.070
G20     1.3            64.9                7.5 +/-    1.05       8.2 +/-    1.05  0.040 / 0.040
G21     99.9           73.4                9.0 +/-    0.38       9.3 +/-    0.38  0.040 / 0.040
G24     97.9           27.3               10.1 +/-    0.96      18.7 +/-    0.96  0.070 / 0.110
G27     299.2          35.1               10.2 +/-    0.82      16.2 +/-    0.82  0.070 / 0.130
G32     210.4          34.5               11.6 +/-    2.20      18.5 +/-    2.20  0.050 / 0.050