PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/11/17-20:13:10
G01     321.0          11.8               -7.4 +/-   35.56     -19.8 +/-   35.56  0.220 / 0.460
G08     262.0          16.8                9.9 +/-    0.86      23.6 +/-    0.86  0.260 / 0.480
G10     68.0           56.4                9.4 +/-    0.71      11.0 +/-    0.71  0.040 / 0.050
G14     275.7          68.4                9.4 +/-    0.69      10.1 +/-    0.69  0.040 / 0.040
G20     98.8           34.2                8.4 +/-    1.04      13.6 +/-    1.04  0.160 / 0.200
G21     154.8          10.3                9.9 +/-    2.00      27.5 +/-    2.00  0.180 / 0.220
G27     231.1          14.1                9.0 +/-    2.49      22.8 +/-    2.49  0.180 / 0.300
G31     179.2          32.2               11.2 +/-    0.99      18.7 +/-    0.99  0.310 / 0.370
G32     349.4          72.4                9.0 +/-    0.32       9.4 +/-    0.32  0.150 / 0.380