PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/28-18:58:00
G03     206.9          55.7               13.8 +/-    1.05      16.3 +/-    1.05  0.060 / 0.050
G07     257.2          15.1               13.1 +/-    1.80      32.4 +/-    1.80  0.060 / 0.040
G09     310.2          27.4                8.4 +/-    1.35      15.5 +/-    1.35  0.040 / 0.080
G16     95.1           64.8               14.0 +/-    1.44      15.3 +/-    1.44  0.060 / 0.080
G22     186.6          40.0               13.6 +/-    1.87      19.8 +/-    1.87  0.230 / 0.290
G23     332.8          61.8               12.9 +/-    0.68      14.4 +/-    0.68  0.140 / 0.300
G26     52.8           42.4               11.2 +/-    0.47      15.7 +/-    0.47  0.050 / 0.070
G27     133.0          11.2               13.1 +/-   27.71      35.5 +/-   27.71  0.030 / 0.060