PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/20-17:57:50
G01     321.0          11.6              -14.7 +/-   31.11     -39.7 +/-   31.11  0.140 / 0.340
G08     262.3          17.0               10.3 +/-    1.91      24.3 +/-    1.91  0.070 / 0.050
G10     67.5           56.5               10.2 +/-    0.80      12.0 +/-    0.80  0.070 / 0.050
G11     308.5          20.0                9.4 +/-    2.07      20.6 +/-    2.07  0.030 / 0.040
G14     275.3          68.6               11.6 +/-    0.52      12.3 +/-    0.52  0.030 / 0.030
G18     309.1          37.4                8.7 +/-    1.22      13.2 +/-    1.22  0.120 / 0.300
G20     98.5           34.4               10.6 +/-    0.76      17.1 +/-    0.76  0.130 / 0.340
G27     231.9          14.6               10.0 +/-    1.50      25.0 +/-    1.50  0.120 / 0.200
G31     180.6          30.2               13.4 +/-    1.70      23.3 +/-    1.70  0.160 / 0.240
G32     344.9          73.0               11.3 +/-    0.68      11.8 +/-    0.68  0.050 / 0.110