PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/18-18:43:00
G03     208.1          55.8               11.7 +/-    0.71      13.9 +/-    0.71  0.080 / 0.160
G07     259.5          19.8               10.7 +/-    1.51      23.6 +/-    1.51  0.090 / 0.230
G09     311.0          29.3                9.2 +/-    1.24      16.4 +/-    1.24  0.110 / 0.090
G16     102.0          65.7               11.4 +/-    0.61      12.4 +/-    0.61  0.100 / 0.120
G22     186.8          38.7               13.4 +/-    0.86      19.8 +/-    0.86  0.200 / 0.310
G23     329.6          59.8               10.3 +/-    0.53      11.7 +/-    0.53  0.260 / 0.410
G26     56.1           47.2               10.0 +/-    1.68      13.0 +/-    1.68  0.050 / 0.040
G27     135.4          10.7                7.8 +/-   35.77      21.4 +/-   35.77  0.050 / 0.050
G31     59.3           12.0                8.5 +/-    1.68      22.7 +/-    1.68  0.040 / 0.030