PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/20-17:43:10
G10     264.6          38.3               10.5 +/-    0.97      15.7 +/-    0.97  0.150 / 0.270
G13     42.7           19.1                7.4 +/-    1.84      16.6 +/-    1.84  0.130 / 0.210
G15     60.9           49.5                7.6 +/-    0.28       9.6 +/-    0.28  0.090 / 0.350
G16     280.8          13.5                8.8 +/-    1.60      22.6 +/-    1.60  0.090 / 0.360
G20     296.0          60.4                8.7 +/-    0.90       9.8 +/-    0.90  0.040 / 0.050
G21     356.5          69.6                8.5 +/-    0.84       9.0 +/-    0.84  0.050 / 0.050
G24     124.5          12.5               10.5 +/-    2.48      27.7 +/-    2.48  0.150 / 0.370
G27     320.0          16.6                6.0 +/-    1.14      14.3 +/-    1.14  0.150 / 0.390
G29     167.0          35.2                8.7 +/-    0.95      13.8 +/-    0.95  0.040 / 0.080