PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-07:27:40
G10     300.4          53.3                3.7 +/-    1.85       4.5 +/-    1.85  0.040 / 0.040
G14     210.1          13.4                2.7 +/-    3.78       7.1 +/-    3.78  0.030 / 0.030
G15     45.8           25.7                3.6 +/-    2.97       6.9 +/-    2.97  0.110 / 0.460
G20     356.1          65.2                3.9 +/-    0.91       4.3 +/-    0.91  0.180 / 0.410
G21     103.0          71.5                5.3 +/-    1.21       5.6 +/-    1.21  0.100 / 0.160
G24     95.1           26.8                5.9 +/-    2.27      11.1 +/-    2.27  0.090 / 0.160
G27     300.8          33.8                2.1 +/-    2.97       3.3 +/-    2.97  0.040 / 0.040
G32     211.8          28.4                7.6 +/-    2.22      13.8 +/-    2.22  0.080 / 0.040