PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/30-18:58:00
G01     247.4          33.3               11.1 +/-    1.30      18.2 +/-    1.30  0.030 / 0.030
G03     314.8          49.2                7.4 +/-    0.79       9.5 +/-    0.79  0.030 / 0.030
G11     236.5          11.0               12.3 +/-    4.07      33.5 +/-    4.07  0.050 / 0.090
G14     63.2           39.5                8.0 +/-    0.84      11.7 +/-    0.84  0.050 / 0.110
G16     162.5          20.8               -0.4 +/-   15.38      -0.9 +/-   15.38  0.150 / 0.270
G22     298.6          69.8                7.9 +/-    0.45       8.4 +/-    0.45  0.140 / 0.280
G23     289.6          22.0                8.8 +/-    1.65      18.5 +/-    1.65  0.040 / 0.040
G26     133.0          40.9               11.4 +/-    0.99      16.4 +/-    0.99  0.030 / 0.040
G31     40.3           54.9                7.1 +/-    0.52       8.4 +/-    0.52  0.140 / 0.110
G32     80.5           20.4                8.6 +/-    1.50      18.8 +/-    1.50  0.100 / 0.100