PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/13-10:12:40
G02     201.0          27.9                6.2 +/-    0.85      11.4 +/-    0.85  0.050 / 0.140
G06     172.7          58.3                7.4 +/-    0.97       8.6 +/-    0.97  0.050 / 0.120
G17     30.9           53.4                4.4 +/-    0.99       5.3 +/-    0.99  0.040 / 0.050
G19     348.2          68.6                4.2 +/-    0.46       4.4 +/-    0.46  0.030 / 0.050
G24     306.4          32.8                4.3 +/-    2.76       7.1 +/-    2.76  0.080 / 0.110
G28     95.7           35.3                5.7 +/-    0.42       9.0 +/-    0.42  0.080 / 0.120