PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/17-22:12:40
G01     240.6          29.1               11.6 +/-    0.97      20.8 +/-    0.97  0.030 / 0.020
G03     311.9          53.6                7.5 +/-    1.11       9.1 +/-    1.11  0.030 / 0.030
G14     70.7           34.5                7.7 +/-    0.62      12.3 +/-    0.62  0.090 / 0.200
G16     161.2          25.9               12.8 +/-    0.57      24.5 +/-    0.57  0.080 / 0.170
G22     283.8          73.3                9.2 +/-    0.78       9.6 +/-    0.78  0.060 / 0.040
G23     294.0          25.1                8.9 +/-    1.77      17.4 +/-    1.77  0.040 / 0.050
G26     128.0          45.6               12.8 +/-    0.53      17.1 +/-    0.53  0.050 / 0.100
G31     39.9           50.1                8.2 +/-    0.87      10.3 +/-    0.87  0.050 / 0.120
G32     85.5           17.3                8.1 +/-    1.74      19.1 +/-    1.74  0.110 / 0.170