PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/11/21-19:57:40
G01     320.9          12.0                4.3 +/-   23.29      11.4 +/-   23.29  0.200 / 0.350
G08     261.8          16.8               10.3 +/-    1.64      24.6 +/-    1.64  0.160 / 0.350
G10     68.3           56.3                8.0 +/-    0.34       9.4 +/-    0.34  0.040 / 0.040
G11     308.1          20.3                9.7 +/-    1.97      21.3 +/-    1.97  0.040 / 0.050
G14     276.2          68.6                9.5 +/-    0.79      10.1 +/-    0.79  0.130 / 0.350
G20     98.9           34.0                8.6 +/-    0.68      13.9 +/-    0.68  0.120 / 0.280
G21     154.7          10.0               11.2 +/-    4.01      31.3 +/-    4.01  0.200 / 0.490
G27     231.0          14.0               10.5 +/-    1.44      26.7 +/-    1.44  0.180 / 0.420
G31     179.3          32.2                9.9 +/-    2.14      16.6 +/-    2.14  0.140 / 0.360
G32     349.6          72.4                9.9 +/-    0.63      10.3 +/-    0.63  0.130 / 0.430