PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/28-21:27:50
G01     240.6          29.1               10.3 +/-    1.00      18.5 +/-    1.00  0.040 / 0.020
G03     311.8          54.0                8.2 +/-    1.26       9.9 +/-    1.26  0.030 / 0.020
G14     70.6           34.8                9.0 +/-    0.96      14.3 +/-    0.96  0.030 / 0.040
G16     160.7          26.2               10.9 +/-    1.98      20.8 +/-    1.98  0.060 / 0.060
G22     283.2          73.5                9.8 +/-    0.52      10.2 +/-    0.52  0.080 / 0.170
G23     294.1          25.3                7.6 +/-    1.49      14.7 +/-    1.49  0.090 / 0.160
G26     127.3          45.7               11.3 +/-    0.53      15.1 +/-    0.53  0.060 / 0.130
G31     40.1           49.6                8.0 +/-    0.90      10.1 +/-    0.90  0.050 / 0.110
G32     85.7           17.1                9.1 +/-    2.14      21.6 +/-    2.14  0.110 / 0.150