PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-20:42:40
G01     302.1          36.1               11.7 +/-    1.52      18.2 +/-    1.52  0.090 / 0.130
G10     111.2          36.8               12.1 +/-    0.71      18.5 +/-    0.71  0.090 / 0.150
G11     276.5          28.1               10.6 +/-    1.26      19.4 +/-    1.26  0.070 / 0.110
G14     8.4            64.1                9.8 +/-    0.76      10.8 +/-    0.76  0.070 / 0.090
G22     311.2          29.5                9.3 +/-    2.02      16.4 +/-    2.02  0.080 / 0.160
G25     76.5           17.8               12.1 +/-    0.93      28.0 +/-    0.93  0.090 / 0.160
G31     165.3          69.4               14.2 +/-    0.94      15.1 +/-    0.94  0.030 / 0.040
G32     40.7           49.5               10.8 +/-    0.43      13.7 +/-    0.43  0.040 / 0.040