PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/20-22:27:50
G08     309.6          19.4                6.7 +/-    1.29      14.9 +/-    1.29  0.040 / 0.040
G10     330.2          59.7                6.3 +/-    0.52       7.2 +/-    0.52  0.040 / 0.040
G14     217.4          29.0               11.4 +/-    2.14      20.4 +/-    2.14  0.160 / 0.160
G15     46.6           16.1                6.8 +/-    1.83      16.4 +/-    1.83  0.220 / 0.280
G20     35.3           60.9                7.0 +/-    0.80       7.9 +/-    0.80  0.090 / 0.070
G21     133.1          58.2               10.6 +/-    0.66      12.3 +/-    0.66  0.070 / 0.060
G24     72.6           28.9                7.3 +/-    1.25      13.1 +/-    1.25  0.070 / 0.080
G27     277.8          37.2                8.9 +/-    0.77      13.6 +/-    0.77  0.080 / 0.060
G32     222.1          52.3                9.9 +/-    1.60      12.1 +/-    1.60  0.090 / 0.180