PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/25-04:28:00
G10     253.4          28.8               10.5 +/-    0.92      18.9 +/-    0.92  0.200 / 0.530
G13     50.9           28.2                5.1 +/-    0.76       9.3 +/-    0.76  0.130 / 0.510
G15     80.3           56.8                7.9 +/-    0.67       9.2 +/-    0.67  0.040 / 0.050
G16     291.6          15.4                8.0 +/-    2.32      19.8 +/-    2.32  0.040 / 0.040
G20     296.3          66.0                7.8 +/-    0.69       8.5 +/-    0.69  0.070 / 0.130
G21     337.1          62.1                7.0 +/-    0.59       7.8 +/-    0.59  0.080 / 0.110
G26     263.4          14.3                9.2 +/-    1.66      23.3 +/-    1.66  0.060 / 0.160
G29     166.0          46.9                9.8 +/-    0.95      12.8 +/-    0.95  0.060 / 0.130