PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/16-06:42:40
G10     268.9          40.2                6.4 +/-    1.12       9.3 +/-    1.12  0.040 / 0.030
G13     41.0           16.5                2.7 +/-    2.55       6.4 +/-    2.55  0.040 / 0.040
G15     56.8           46.5                5.5 +/-    1.05       7.2 +/-    1.05  0.090 / 0.060
G16     281.9          11.4                4.0 +/-    1.82      10.9 +/-    1.82  0.070 / 0.070
G20     301.0          61.0                5.5 +/-    0.65       6.2 +/-    0.65  0.190 / 0.240
G21     13.7           73.2                5.7 +/-    0.37       5.9 +/-    0.37  0.150 / 0.320
G24     118.3          15.2                5.4 +/-    2.40      13.3 +/-    2.40  0.250 / 0.440
G27     318.8          18.5                3.6 +/-    1.42       8.3 +/-    1.42  0.250 / 0.370
G29     165.4          25.6                6.5 +/-    2.61      12.4 +/-    2.61  0.110 / 0.150