PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/11-20:57:30
G10     253.6          29.3               13.3 +/-    1.48      23.7 +/-    1.48  0.080 / 0.150
G13     50.5           27.7               10.0 +/-    0.94      18.4 +/-    0.94  0.070 / 0.130
G15     89.2           60.1               11.2 +/-    0.58      12.8 +/-    0.58  0.140 / 0.580
G16     291.6          15.4               10.0 +/-    2.87      24.7 +/-    2.87  0.140 / 0.480
G20     274.5          52.9               11.8 +/-    0.70      14.3 +/-    0.70  0.040 / 0.060
G21     338.2          62.5               10.1 +/-    0.61      11.2 +/-    0.61  0.040 / 0.060
G26     264.3          14.2               13.3 +/-    2.29      33.6 +/-    2.29  0.070 / 0.190
G29     165.7          46.8               12.5 +/-    0.72      16.4 +/-    0.72  0.060 / 0.200