PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/12/12-15:13:00
G10     304.0          54.6                6.6 +/-    1.10       7.9 +/-    1.10  0.150 / 0.120
G15     45.4           22.0                3.9 +/-    2.58       8.1 +/-    2.58  0.110 / 0.080
G20     7.9            64.4                6.8 +/-    0.49       7.5 +/-    0.49  0.050 / 0.050
G21     105.6          71.3                7.5 +/-    0.44       7.8 +/-    0.44  0.060 / 0.050
G24     96.3           27.8                8.0 +/-    1.10      14.7 +/-    1.10  0.040 / 0.040
G27     297.5          35.8                8.1 +/-    2.35      12.7 +/-    2.35  0.040 / 0.040
G32     210.8          36.4                8.8 +/-    1.46      13.6 +/-    1.46  0.090 / 0.260