PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/18-19:28:00
G01     317.9          20.2               10.1 +/-    2.63      22.2 +/-    2.63  0.270 / 0.360
G08     255.1          11.7                8.8 +/-   20.93      23.7 +/-   20.93  0.230 / 0.320
G10     83.7           52.2               11.6 +/-    1.35      14.2 +/-    1.35  0.060 / 0.050
G11     301.1          24.0                9.0 +/-    1.44      18.0 +/-    1.44  0.040 / 0.050
G14     306.7          71.0               10.3 +/-    0.88      10.9 +/-    0.88  0.280 / 0.340
G18     104.9          25.5               12.7 +/-    2.06      24.5 +/-    2.06  0.300 / 0.310
G22     301.9          12.1               10.0 +/-    3.58      26.8 +/-    3.58  0.040 / 0.030
G25     98.5           9.7                -8.1 +/-   39.71     -22.7 +/-   39.71  0.040 / 0.020
G31     176.9          43.9               11.9 +/-    1.05      16.2 +/-    1.05  0.070 / 0.030
G32     11.0           65.9               10.2 +/-    0.48      11.1 +/-    0.48  0.070 / 0.040