PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/12-11:28:00
G10     254.3          29.2                5.3 +/-    2.83       9.5 +/-    2.83  0.050 / 0.040
G13     50.4           28.1                1.0 +/-    2.80       1.8 +/-    2.80  0.050 / 0.040
G15     75.7           55.1                4.2 +/-    0.53       5.0 +/-    0.53  0.050 / 0.050
G16     293.0          14.5                2.9 +/-    0.94       7.3 +/-    0.94  0.080 / 0.040
G20     41.7           50.1                2.6 +/-    0.80       3.3 +/-    0.80  0.080 / 0.270
G21     343.6          64.9                3.5 +/-    0.49       3.9 +/-    0.49  0.060 / 0.230
G26     264.1          13.8                1.7 +/-    2.19       4.3 +/-    2.19  0.110 / 0.160
G29     165.1          43.3                5.1 +/-    0.67       7.0 +/-    0.67  0.090 / 0.180