PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/09-09:57:50
G10     291.0          50.1                4.7 +/-    2.89       5.9 +/-    2.89  0.040 / 0.030
G15     47.0           31.7                3.2 +/-    1.27       5.4 +/-    1.27  0.040 / 0.030
G20     341.1          65.3                4.9 +/-    0.47       5.3 +/-    0.47  0.140 / 0.170
G21     88.0           73.5               -6.0 +/-    0.66      -6.3 +/-    0.66  0.160 / 0.150
G24     100.7          24.4                7.4 +/-    1.06      14.6 +/-    1.06  0.120 / 0.110
G27     307.3          30.3                5.5 +/-    0.66       9.5 +/-    0.66  0.110 / 0.090
G32     209.3          23.3                6.3 +/-    1.74      12.8 +/-    1.74  0.110 / 0.150