PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/23-13:42:40
G03     229.8          69.6                8.2 +/-    0.78       8.7 +/-    0.78  0.050 / 0.060
G07     247.2          10.8               -1.4 +/-   19.38      -3.8 +/-   19.38  0.070 / 0.080
G09     301.4          15.2                5.5 +/-    1.24      13.5 +/-    1.24  0.110 / 0.360
G14     97.7           15.4                6.8 +/-    2.12      16.7 +/-    2.12  0.080 / 0.340
G16     137.1          55.4               10.2 +/-    0.64      12.1 +/-    0.64  0.040 / 0.050
G22     191.2          54.8               10.2 +/-    1.57      12.1 +/-    1.57  0.040 / 0.040
G23     317.5          47.4                6.3 +/-    1.38       8.3 +/-    1.38  0.040 / 0.060
G26     76.8           54.3                7.3 +/-    0.45       8.8 +/-    0.45  0.040 / 0.060
G31     50.9           21.9                5.1 +/-    1.33      10.8 +/-    1.33  0.080 / 0.270