PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/31-18:58:00
G01     312.5          28.3                8.8 +/-    1.25      16.0 +/-    1.25  0.120 / 0.200
G10     97.9           45.5               11.8 +/-    1.08      15.7 +/-    1.08  0.130 / 0.230
G11     291.0          27.0                8.2 +/-    1.49      15.3 +/-    1.49  0.110 / 0.270
G14     338.3          69.7               10.1 +/-    0.43      10.7 +/-    0.43  0.170 / 0.270
G18     113.0          17.8               11.0 +/-    2.23      25.6 +/-    2.23  0.030 / 0.040
G22     306.8          20.1                9.9 +/-    2.15      21.7 +/-    2.15  0.030 / 0.030
G25     89.1           14.3               12.4 +/-    2.27      31.5 +/-    2.27  0.030 / 0.030
G31     173.1          56.2               13.2 +/-    0.60      15.6 +/-    0.60  0.040 / 0.030
G32     27.3           58.0                9.8 +/-    0.74      11.3 +/-    0.74  0.050 / 0.040