PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/27-03:28:00
G10     291.3          49.6                8.5 +/-    0.73      10.8 +/-    0.73  0.040 / 0.040
G15     47.3           33.4                5.4 +/-    0.48       8.8 +/-    0.48  0.030 / 0.040
G20     333.9          64.7                7.6 +/-    0.90       8.4 +/-    0.90  0.080 / 0.120
G21     77.9           76.8                9.2 +/-    1.13       9.4 +/-    1.13  0.060 / 0.110
G24     101.1          24.7                9.1 +/-    0.91      18.0 +/-    0.91  0.080 / 0.120
G27     304.7          32.2                8.0 +/-    1.92      13.3 +/-    1.92  0.090 / 0.170
G29     168.8          12.2                7.0 +/-    2.31      18.6 +/-    2.31  0.040 / 0.050
G32     208.6          29.6               10.3 +/-    1.35      18.1 +/-    1.35  0.040 / 0.050