PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-17:42:30
G01     244.2          31.5               11.8 +/-    1.41      20.0 +/-    1.41  0.070 / 0.210
G03     313.3          53.4                7.2 +/-    1.80       8.7 +/-    1.80  0.080 / 0.270
G14     65.9           38.2                7.3 +/-    0.60      10.9 +/-    0.60  0.020 / 0.040
G16     160.4          24.1               14.0 +/-    1.00      27.8 +/-    1.00  0.030 / 0.050
G22     290.1          73.0                8.5 +/-    1.21       8.8 +/-    1.21  0.030 / 0.040
G23     292.2          24.6                9.3 +/-    1.62      18.4 +/-    1.62  0.030 / 0.040
G26     128.9          43.4               13.5 +/-    1.13      18.6 +/-    1.13  0.040 / 0.110
G31     40.4           51.1                7.2 +/-    0.41       9.0 +/-    0.41  0.040 / 0.110
G32     83.2           18.2                9.3 +/-    1.20      21.3 +/-    1.20  0.080 / 0.160