PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-18:43:00
G03     235.6          69.3                9.8 +/-    0.41      10.4 +/-    0.41  0.080 / 0.170
G09     301.6          15.3                7.7 +/-    2.12      19.0 +/-    2.12  0.090 / 0.190
G14     97.3           17.4               13.0 +/-    1.92      30.6 +/-    1.92  0.040 / 0.060
G16     131.9          57.2               14.5 +/-    0.91      16.9 +/-    0.91  0.040 / 0.060
G22     194.4          57.0               11.5 +/-    1.96      13.4 +/-    1.96  0.110 / 0.420
G23     318.6          48.5                9.5 +/-    0.84      12.3 +/-    0.84  0.110 / 0.450
G26     72.3           52.3               11.2 +/-    0.43      13.7 +/-    0.43  0.030 / 0.050
G31     51.2           20.8                8.1 +/-    1.16      17.5 +/-    1.16  0.030 / 0.040