PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/18-09:27:50
G10     295.5          51.7                4.2 +/-    2.20       5.2 +/-    2.20  0.040 / 0.030
G14     209.3          10.8               -7.5 +/-    2.32     -20.7 +/-    2.32  0.030 / 0.030
G15     46.3           28.8                3.3 +/-    1.46       5.9 +/-    1.46  0.240 / 0.280
G20     348.7          65.4                4.2 +/-    0.48       4.6 +/-    0.48  0.080 / 0.070
G21     96.6           72.2                5.4 +/-    1.03       5.6 +/-    1.03  0.060 / 0.050
G24     97.7           25.6                5.9 +/-    1.02      11.4 +/-    1.02  0.060 / 0.100
G27     304.3          32.1                3.9 +/-    1.50       6.6 +/-    1.50  0.060 / 0.100
G32     210.5          25.9                4.7 +/-    1.77       9.0 +/-    1.77  0.060 / 0.130