PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/28-05:42:40
G10     263.6          37.1                8.0 +/-    0.80      12.2 +/-    0.80  0.040 / 0.040
G13     43.3           20.1                3.7 +/-    0.86       8.0 +/-    0.86  0.040 / 0.040
G15     61.9           50.1                5.3 +/-    0.36       6.7 +/-    0.36  0.070 / 0.270
G16     286.0          12.8                4.9 +/-    1.93      12.9 +/-    1.93  0.080 / 0.220
G20     291.7          58.8                6.6 +/-    0.97       7.6 +/-    0.97  0.150 / 0.290
G21     359.7          70.2                5.4 +/-    0.52       5.7 +/-    0.52  0.130 / 0.340
G24     122.6          12.3                5.4 +/-    1.07      14.2 +/-    1.07  0.060 / 0.090
G27     320.7          14.8                2.0 +/-    4.38       5.0 +/-    4.38  0.060 / 0.090
G29     165.0          31.3                7.7 +/-    1.97      13.1 +/-    1.97  0.150 / 0.360