PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/18-12:27:30
G10     298.5          51.9                3.0 +/-    2.30       3.7 +/-    2.30  0.070 / 0.080
G14     210.9          11.5               -5.3 +/-   11.60     -14.2 +/-   11.60  0.070 / 0.090
G15     45.7           25.8                2.7 +/-    3.03       5.2 +/-    3.03  0.030 / 0.040
G20     70.1           22.3                1.7 +/-    0.85       3.5 +/-    0.85  0.040 / 0.040
G21     103.4          71.4                3.3 +/-    1.06       3.5 +/-    1.06  0.080 / 0.210
G24     97.1           27.0                3.1 +/-    1.05       5.8 +/-    1.05  0.070 / 0.160
G27     298.1          35.3                4.5 +/-    2.06       7.1 +/-    2.06  0.300 / 0.390
G32     211.1          33.8                5.0 +/-    1.57       8.1 +/-    1.57  0.140 / 0.470