PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/12-22:28:00
G07     321.7          53.3                9.3 +/-    0.48      11.3 +/-    0.48  0.170 / 0.260
G08     114.9          48.9               10.6 +/-    0.49      13.5 +/-    0.49  0.190 / 0.270
G09     223.5          81.3                9.9 +/-    0.52      10.0 +/-    0.52  0.150 / 0.370
G16     44.4           14.3                7.1 +/-    1.70      17.9 +/-    1.70  0.110 / 0.310
G23     151.9          48.8               10.0 +/-    0.58      12.8 +/-    0.58  0.040 / 0.050
G27     62.5           34.5                9.3 +/-    0.98      14.9 +/-    0.98  0.030 / 0.060
G28     231.8          23.9               10.2 +/-    2.82      20.5 +/-    2.82  0.060 / 0.070
G30     298.1          33.7                7.7 +/-    1.37      12.5 +/-    1.37  0.050 / 0.060