PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-04:57:50
G10     253.9          29.2               10.0 +/-    1.81      17.8 +/-    1.81  0.100 / 0.380
G13     50.4           27.8                6.3 +/-    2.64      11.6 +/-    2.64  0.100 / 0.490
G15     78.8           56.4                8.9 +/-    0.47      10.4 +/-    0.47  0.050 / 0.040
G16     291.1          15.3                5.0 +/-    1.79      12.4 +/-    1.79  0.040 / 0.040
G20     307.5          68.6                6.1 +/-    0.99       6.5 +/-    0.99  0.170 / 0.190
G21     338.1          62.6                6.6 +/-    0.73       7.3 +/-    0.73  0.100 / 0.260
G26     262.9          14.0                7.6 +/-    2.69      19.4 +/-    2.69  0.040 / 0.050
G29     166.1          46.2               10.3 +/-    0.70      13.7 +/-    0.70  0.040 / 0.050