PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/20-19:42:30
G01     245.4          32.2                9.0 +/-    1.27      15.1 +/-    1.27  0.040 / 0.030
G03     314.2          50.5                9.4 +/-    0.96      11.8 +/-    0.96  0.040 / 0.030
G14     65.3           38.2                9.0 +/-    0.98      13.6 +/-    0.98  0.090 / 0.240
G16     162.0          22.2                8.9 +/-    2.02      18.6 +/-    2.02  0.090 / 0.230
G22     295.2          70.9                8.7 +/-    0.35       9.2 +/-    0.35  0.110 / 0.110
G23     290.8          22.9                9.8 +/-    1.75      20.2 +/-    1.75  0.080 / 0.100
G26     131.6          42.2               12.5 +/-    1.01      17.6 +/-    1.01  0.050 / 0.040
G31     40.1           53.4                8.8 +/-    0.68      10.7 +/-    0.68  0.050 / 0.030
G32     81.9           19.5                9.3 +/-    2.27      20.7 +/-    2.27  0.050 / 0.100