PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/30-05:12:30
G10     254.0          30.6                8.5 +/-    1.08      14.8 +/-    1.08  0.040 / 0.050
G13     49.9           26.8                5.4 +/-    1.42      10.1 +/-    1.42  0.040 / 0.040
G15     76.7           55.5                5.2 +/-    0.40       6.1 +/-    0.40  0.090 / 0.110
G16     295.4          14.3                5.5 +/-    1.76      13.8 +/-    1.76  0.070 / 0.110
G20     275.7          53.4                8.8 +/-    0.82      10.7 +/-    0.82  0.080 / 0.270
G21     341.9          63.7                5.1 +/-    0.54       5.6 +/-    0.54  0.070 / 0.270
G26     267.0          13.8                6.5 +/-    1.56      16.5 +/-    1.56  0.060 / 0.210
G29     162.8          41.9                7.0 +/-    1.14       9.9 +/-    1.14  0.070 / 0.180