PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/13-04:58:00
G10     271.8          41.8                7.1 +/-    0.96      10.0 +/-    0.96  0.230 / 0.210
G13     39.9           14.4                4.2 +/-    3.93      10.6 +/-    3.93  0.180 / 0.250
G15     54.5           44.4                5.8 +/-    0.54       7.9 +/-    0.54  0.040 / 0.030
G16     278.4          10.8                7.5 +/-    2.17      20.6 +/-    2.17  0.040 / 0.030
G20     305.9          61.9                6.6 +/-    0.73       7.4 +/-    0.73  0.050 / 0.060
G21     17.7           74.2                7.5 +/-    1.03       7.8 +/-    1.03  0.110 / 0.060
G24     116.7          16.6                7.4 +/-    1.69      17.7 +/-    1.69  0.210 / 0.380
G27     317.5          20.7                5.7 +/-    1.83      12.4 +/-    1.83  0.170 / 0.310
G29     166.2          24.3                8.3 +/-    2.04      16.6 +/-    2.04  0.100 / 0.290