PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-17:27:30
G01     243.6          31.1               10.6 +/-    1.81      18.1 +/-    1.81  0.020 / 0.050
G03     312.9          54.2                7.1 +/-    1.57       8.5 +/-    1.57  0.030 / 0.050
G14     66.5           37.9                7.5 +/-    0.55      11.3 +/-    0.55  0.030 / 0.040
G16     160.0          24.8               14.9 +/-    1.39      29.3 +/-    1.39  0.030 / 0.040
G22     288.0          73.6                8.3 +/-    0.94       8.6 +/-    0.94  0.040 / 0.120
G23     292.8          25.1                9.7 +/-    1.00      19.0 +/-    1.00  0.050 / 0.120
G26     128.1          43.9               12.8 +/-    1.10      17.5 +/-    1.10  0.080 / 0.210
G31     40.5           50.4                7.5 +/-    0.73       9.5 +/-    0.73  0.070 / 0.160
G32     83.7           17.8                9.5 +/-    1.24      22.1 +/-    1.24  0.080 / 0.170