PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/08-07:58:00
G10     293.0          50.8                5.9 +/-    2.28       7.4 +/-    2.28  0.050 / 0.030
G15     46.6           30.2                3.7 +/-    1.07       6.4 +/-    1.07  0.050 / 0.030
G20     344.2          65.3                5.0 +/-    0.92       5.5 +/-    0.92  0.110 / 0.110
G21     88.8           74.0                5.6 +/-    0.48       5.8 +/-    0.48  0.110 / 0.080
G24     100.2          24.9                7.5 +/-    1.27      14.7 +/-    1.27  0.150 / 0.190
G27     305.8          31.3                5.6 +/-    0.97       9.5 +/-    0.97  0.160 / 0.220
G32     210.0          23.3                6.5 +/-    2.33      13.2 +/-    2.33  0.070 / 0.090