PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/21-12:43:00
G08     317.0          13.8                2.5 +/-    2.94       6.4 +/-    2.94  0.050 / 0.080
G10     318.3          57.3                1.7 +/-    0.71       1.9 +/-    0.71  0.100 / 0.070
G14     215.1          22.7                4.2 +/-    1.45       8.6 +/-    1.45  0.330 / 0.280
G15     45.8           15.1                1.1 +/-    1.91       2.6 +/-    1.91  0.210 / 0.180
G20     79.1           14.6                1.6 +/-    1.86       3.9 +/-    1.86  0.040 / 0.030
G21     126.4          61.5                2.7 +/-    0.42       3.0 +/-    0.42  0.040 / 0.040
G24     83.0           30.1                2.3 +/-    0.69       4.0 +/-    0.69  0.200 / 0.330
G27     282.9          37.9                6.5 +/-    1.68       9.7 +/-    1.68  0.110 / 0.360
G32     217.9          46.1                4.4 +/-    1.47       5.8 +/-    1.47  0.210 / 0.330