PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-06:57:50
G10     283.8          47.4                6.2 +/-    2.64       8.1 +/-    2.64  0.050 / 0.040
G15     48.7           36.1                5.6 +/-    0.82       8.6 +/-    0.82  0.050 / 0.040
G20     327.9          64.7                5.5 +/-    0.42       6.0 +/-    0.42  0.090 / 0.080
G21     60.4           76.3                7.2 +/-    1.16       7.4 +/-    1.16  0.110 / 0.150
G24     107.2          21.9                6.2 +/-    2.29      13.0 +/-    2.29  0.160 / 0.380
G27     311.5          27.4                4.0 +/-    1.92       7.5 +/-    1.92  0.260 / 0.320
G29     166.2          13.7                2.8 +/-    2.59       7.3 +/-    2.59  0.080 / 0.140
G32     207.9          17.3                5.3 +/-    1.25      12.5 +/-    1.25  0.080 / 0.090