PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/21-19:43:00
G01     243.6          31.1               12.7 +/-    1.96      21.8 +/-    1.96  0.040 / 0.030
G03     313.3          52.3               11.1 +/-    0.68      13.7 +/-    0.68  0.030 / 0.030
G14     67.1           37.1               10.8 +/-    0.75      16.4 +/-    0.75  0.030 / 0.060
G16     161.1          24.0               12.4 +/-    1.46      24.9 +/-    1.46  0.030 / 0.040
G22     290.7          72.3               12.0 +/-    1.30      12.5 +/-    1.30  0.100 / 0.180
G23     292.2          24.0               11.0 +/-    1.70      21.9 +/-    1.70  0.080 / 0.170
G26     129.5          43.6               12.9 +/-    0.89      17.7 +/-    0.89  0.090 / 0.100
G31     40.2           51.6                8.7 +/-    0.63      10.8 +/-    0.63  0.100 / 0.120
G32     83.4           18.4                9.6 +/-    1.29      22.0 +/-    1.29  0.170 / 0.180