PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/31-16:13:00
G01     320.1          14.6                5.4 +/-    2.57      13.4 +/-    2.57  0.250 / 0.260
G08     262.7          15.0                7.0 +/-    1.83      17.4 +/-    1.83  0.370 / 0.260
G10     73.0           55.7                7.6 +/-    0.43       9.0 +/-    0.43  0.030 / 0.030
G11     308.0          19.6                5.7 +/-    0.86      12.7 +/-    0.86  0.040 / 0.040
G14     283.0          68.7                7.7 +/-    0.56       8.2 +/-    0.56  0.060 / 0.060
G27     225.8          10.9                7.4 +/-    6.10      20.4 +/-    6.10  0.060 / 0.060
G31     176.9          37.9               10.7 +/-    0.97      16.2 +/-    0.97  0.200 / 0.290
G32     0.0            69.9                7.5 +/-    0.32       7.9 +/-    0.32  0.130 / 0.320