PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/27-19:27:50
G01     239.5          28.3               10.3 +/-    1.55      18.6 +/-    1.55  0.030 / 0.040
G03     310.4          56.7               10.4 +/-    0.67      12.1 +/-    0.67  0.040 / 0.040
G14     71.3           34.7                9.5 +/-    1.43      15.1 +/-    1.43  0.070 / 0.160
G16     158.9          28.3               13.9 +/-    1.50      25.3 +/-    1.50  0.050 / 0.160
G22     276.3          74.9               11.3 +/-    0.83      11.7 +/-    0.83  0.040 / 0.050
G23     295.5          26.9                7.7 +/-    3.13      14.5 +/-    3.13  0.040 / 0.060
G26     124.0          46.8               14.0 +/-    0.51      18.4 +/-    0.51  0.090 / 0.180
G31     40.6           47.1                8.9 +/-    0.45      11.6 +/-    0.45  0.090 / 0.160
G32     87.0           15.7                8.4 +/-    0.99      20.5 +/-    0.99  0.070 / 0.140