PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/17-17:27:40
G10     255.9          30.1               11.8 +/-    2.40      20.5 +/-    2.40  0.510 / 0.330
G13     49.3           27.4                8.0 +/-    2.36      14.8 +/-    2.36  0.400 / 0.360
G15     73.4           54.6                9.8 +/-    0.39      11.7 +/-    0.39  0.050 / 0.040
G16     295.4          13.0                9.8 +/-    1.77      25.5 +/-    1.77  0.060 / 0.040
G18     280.9          60.7               11.3 +/-    1.35      12.7 +/-    1.35  0.050 / 0.060
G20     45.8           45.0                9.0 +/-    0.53      12.2 +/-    0.53  0.070 / 0.050
G21     349.8          67.0               10.0 +/-    0.52      10.7 +/-    0.52  0.190 / 0.310
G26     265.9          12.9               11.2 +/-    1.62      29.2 +/-    1.62  0.170 / 0.260
G27     321.8          11.2               -5.3 +/-   28.26     -14.3 +/-   28.26  0.090 / 0.300
G29     163.7          37.6               12.2 +/-    0.96      18.5 +/-    0.96  0.090 / 0.300