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                5.9 +/-    1.05       8.4 +/-    1.05  0.120 / 0.290
G13     40.2           14.9                4.1 +/-    2.54      10.1 +/-    2.54  0.130 / 0.220
G15     55.1           44.9                3.8 +/-    0.44       5.1 +/-    0.44  0.070 / 0.080
G16     279.1          11.0                6.1 +/-    1.61      16.6 +/-    1.61  0.060 / 0.070
G20     304.7          61.7                4.3 +/-    0.90       4.9 +/-    0.90  0.040 / 0.050
G21     16.2           73.9                5.0 +/-    0.64       5.2 +/-    0.64  0.040 / 0.040
G24     117.2          16.2                5.3 +/-    1.43      12.8 +/-    1.43  0.120 / 0.470
G27     317.8          20.2                6.5 +/-    1.20      14.1 +/-    1.20  0.130 / 0.530
G29     166.1          24.7                4.4 +/-    1.06       8.6 +/-    1.06  0.130 / 0.420