PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/27-19:27:50
G01     307.9          32.5                8.8 +/-    1.70      14.6 +/-    1.70  0.090 / 0.150
G10     104.9          41.3               10.8 +/-    0.98      15.3 +/-    0.98  0.170 / 0.120
G11     284.0          27.9               10.6 +/-    1.16      19.4 +/-    1.16  0.080 / 0.160
G14     354.5          67.3                7.5 +/-    0.31       8.1 +/-    0.31  0.090 / 0.130
G18     117.1          13.3               11.4 +/-    2.10      29.5 +/-    2.10  0.040 / 0.030
G22     309.2          24.8                9.0 +/-    1.39      17.6 +/-    1.39  0.020 / 0.030
G25     83.0           16.4               10.4 +/-    1.50      25.0 +/-    1.50  0.060 / 0.040
G31     169.9          63.1               11.6 +/-    0.53      12.9 +/-    0.53  0.030 / 0.030
G32     34.5           53.5                8.2 +/-    1.28      10.0 +/-    1.28  0.030 / 0.030