PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/28-05:43:00
G10     263.6          37.1                7.7 +/-    1.82      11.8 +/-    1.82  0.080 / 0.070
G13     43.3           20.1                4.3 +/-    2.04       9.4 +/-    2.04  0.050 / 0.110
G15     61.9           50.1                5.2 +/-    1.31       6.5 +/-    1.31  0.040 / 0.040
G16     286.0          12.8                4.8 +/-    1.30      12.7 +/-    1.30  0.030 / 0.040
G20     291.7          58.8                6.2 +/-    1.14       7.1 +/-    1.14  0.120 / 0.230
G21     359.7          70.2                5.5 +/-    0.96       5.8 +/-    0.96  0.140 / 0.240
G24     122.6          12.3                6.3 +/-    2.04      16.6 +/-    2.04  0.260 / 0.250
G27     320.7          14.8                3.6 +/-    2.22       8.9 +/-    2.22  0.150 / 0.250
G29     165.0          31.3                6.5 +/-    1.07      11.1 +/-    1.07  0.260 / 0.300