PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/13-19:58:10
G03     208.6          56.4                9.8 +/-    0.85      11.5 +/-    0.85  0.040 / 0.060
G07     257.1          15.1                9.8 +/-    1.28      24.2 +/-    1.28  0.050 / 0.060
G09     310.2          27.3                8.7 +/-    0.65      16.1 +/-    0.65  0.130 / 0.400
G16     96.9           65.1               10.1 +/-    1.06      11.0 +/-    1.06  0.200 / 0.500
G22     187.3          40.7                9.6 +/-    0.72      13.8 +/-    0.72  0.030 / 0.030
G23     331.9          61.1                9.1 +/-    0.71      10.3 +/-    0.71  0.040 / 0.040
G26     53.2           42.9                8.0 +/-    1.16      11.2 +/-    1.16  0.220 / 0.350
G27     133.1          11.2                9.6 +/-   20.29      26.1 +/-   20.29  0.280 / 0.430
G31     59.6           9.8                 7.6 +/-    1.73      21.3 +/-    1.73  0.030 / 0.050