PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-18:42:30
G03     235.6          69.3               10.5 +/-    0.81      11.1 +/-    0.81  0.040 / 0.030
G09     301.6          15.3                7.4 +/-    1.18      18.2 +/-    1.18  0.030 / 0.050
G14     97.3           17.4               11.9 +/-    1.20      27.9 +/-    1.20  0.110 / 0.230
G16     131.9          57.2               12.7 +/-    0.75      14.8 +/-    0.75  0.100 / 0.270
G22     194.4          57.0               10.4 +/-    0.61      12.2 +/-    0.61  0.030 / 0.050
G23     318.6          48.5                9.5 +/-    0.89      12.2 +/-    0.89  0.030 / 0.040
G26     72.3           52.3               10.4 +/-    0.64      12.7 +/-    0.64  0.180 / 0.230
G31     51.2           20.8                8.7 +/-    3.18      18.7 +/-    3.18  0.150 / 0.230