PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/21-21:13:00
G01     318.8          18.3               11.0 +/-    2.12      25.3 +/-    2.12  0.160 / 0.150
G08     256.5          12.9               11.7 +/-    6.07      30.7 +/-    6.07  0.170 / 0.170
G10     79.8           53.6               12.0 +/-    1.42      14.5 +/-    1.42  0.050 / 0.060
G11     302.7          23.5               10.4 +/-    1.45      21.1 +/-    1.45  0.050 / 0.060
G14     300.4          71.0               11.1 +/-    0.82      11.6 +/-    0.82  0.020 / 0.020
G18     102.7          27.6               13.9 +/-    0.89      25.7 +/-    0.89  0.020 / 0.030
G31     178.6          40.0               15.5 +/-    1.00      22.5 +/-    1.00  0.040 / 0.030
G32     4.2            68.1               11.1 +/-    0.71      11.8 +/-    0.71  0.030 / 0.040