PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-20:12:40
G01     313.3          27.4                9.7 +/-    1.71      18.0 +/-    1.71  0.080 / 0.150
G10     96.3           46.4               11.3 +/-    1.05      14.9 +/-    1.05  0.120 / 0.160
G11     291.7          27.1               10.2 +/-    1.44      18.9 +/-    1.44  0.040 / 0.040
G14     336.1          70.0               10.4 +/-    0.50      11.0 +/-    0.50  0.030 / 0.030
G18     112.0          19.0               12.3 +/-    0.74      27.8 +/-    0.74  0.140 / 0.220
G22     306.2          18.8                9.5 +/-    1.01      21.5 +/-    1.01  0.170 / 0.320
G25     89.9           13.8               13.1 +/-    2.02      33.6 +/-    2.02  0.040 / 0.030
G31     174.7          54.1               14.0 +/-    0.64      16.9 +/-    0.64  0.030 / 0.040
G32     24.9           59.3               10.1 +/-    0.97      11.5 +/-    0.97  0.100 / 0.140