PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-17:27:50
G01     243.6          31.1                7.9 +/-    1.66      13.6 +/-    1.66  0.030 / 0.040
G03     312.9          54.2                8.1 +/-    1.16       9.8 +/-    1.16  0.030 / 0.030
G14     66.5           37.9                8.2 +/-    1.04      12.4 +/-    1.04  0.050 / 0.100
G16     160.0          24.8               13.7 +/-    1.55      26.9 +/-    1.55  0.050 / 0.090
G22     288.0          73.6                8.3 +/-    0.67       8.6 +/-    0.67  0.090 / 0.160
G23     292.8          25.1                6.6 +/-    1.40      12.8 +/-    1.40  0.090 / 0.180
G26     128.1          43.9               11.9 +/-    0.57      16.2 +/-    0.57  0.030 / 0.040
G31     40.5           50.4                8.2 +/-    0.52      10.3 +/-    0.52  0.040 / 0.040
G32     83.7           17.8                9.4 +/-    1.20      21.9 +/-    1.20  0.090 / 0.100