PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/09-05:12:40
G10     271.0          41.4                5.8 +/-    0.93       8.2 +/-    0.93  0.130 / 0.200
G13     40.2           14.9                3.7 +/-    3.06       9.2 +/-    3.06  0.230 / 0.230
G15     55.1           44.9                4.9 +/-    0.93       6.6 +/-    0.93  0.040 / 0.030
G16     279.1          11.0                7.1 +/-    0.92      19.5 +/-    0.92  0.040 / 0.030
G20     304.7          61.7                4.2 +/-    0.96       4.7 +/-    0.96  0.080 / 0.050
G21     16.2           73.9                5.5 +/-    0.76       5.7 +/-    0.76  0.080 / 0.060
G24     117.2          16.2                5.3 +/-    1.23      12.8 +/-    1.23  0.210 / 0.390
G27     317.8          20.2                3.8 +/-    2.00       8.4 +/-    2.00  0.170 / 0.470
G29     166.1          24.7                4.9 +/-    2.60       9.6 +/-    2.60  0.140 / 0.260