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               10.8 +/-    0.93      14.9 +/-    0.93  0.070 / 0.150
G07     267.8          23.1                8.1 +/-    2.74      16.5 +/-    2.74  0.070 / 0.110
G09     315.9          38.4                9.1 +/-    1.08      13.6 +/-    1.08  0.040 / 0.050
G16     64.9           60.9                8.9 +/-    0.81      10.0 +/-    0.81  0.030 / 0.040
G22     183.4          27.5               10.9 +/-    2.09      20.1 +/-    2.09  0.070 / 0.120
G23     348.8          72.7                8.8 +/-    0.85       9.2 +/-    0.85  0.060 / 0.120
G26     45.6           32.1                7.4 +/-    0.45      12.5 +/-    0.45  0.040 / 0.040
G27     122.9          20.0               11.1 +/-    0.96      24.4 +/-    0.96  0.040 / 0.040