PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/20-19:43:00
G01     245.4          32.2               10.9 +/-    1.60      18.3 +/-    1.60  0.050 / 0.050
G03     314.2          50.5                8.8 +/-    1.46      11.1 +/-    1.46  0.040 / 0.050
G11     234.7          10.0               12.8 +/-    4.13      35.7 +/-    4.13  0.030 / 0.040
G14     65.3           38.2                9.1 +/-    0.55      13.7 +/-    0.55  0.030 / 0.040
G16     162.0          22.2                8.8 +/-    1.53      18.4 +/-    1.53  0.070 / 0.240
G22     295.2          70.9               11.1 +/-    0.91      11.6 +/-    0.91  0.080 / 0.240
G23     290.8          22.9               10.3 +/-    1.32      21.1 +/-    1.32  0.100 / 0.130
G26     131.6          42.2               13.6 +/-    1.22      19.2 +/-    1.22  0.090 / 0.130
G31     40.1           53.4                8.6 +/-    0.82      10.4 +/-    0.82  0.050 / 0.160
G32     81.9           19.5                9.5 +/-    0.85      21.1 +/-    0.85  0.050 / 0.150