PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/13-20:28:00
G03     198.9          43.1                9.1 +/-    0.49      12.6 +/-    0.49  0.090 / 0.140
G07     267.8          23.1                9.4 +/-    3.35      19.2 +/-    3.35  0.090 / 0.120
G09     315.9          38.4                8.6 +/-    1.67      12.8 +/-    1.67  0.040 / 0.030
G16     64.9           60.9               10.0 +/-    0.52      11.3 +/-    0.52  0.030 / 0.040
G22     183.4          27.5                8.4 +/-    1.21      15.5 +/-    1.21  0.100 / 0.160
G23     348.8          72.7                8.7 +/-    0.45       9.1 +/-    0.45  0.080 / 0.160
G26     45.6           32.1                6.8 +/-    1.14      11.5 +/-    1.14  0.030 / 0.030
G27     122.9          20.0               10.1 +/-    2.10      22.3 +/-    2.10  0.040 / 0.030