PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-14:42:50
G08     272.2          18.6                5.5 +/-    1.35      12.5 +/-    1.35  0.050 / 0.120
G10     56.2           59.6                6.2 +/-    0.77       7.1 +/-    0.77  0.060 / 0.120
G11     314.6          13.5                4.7 +/-    1.20      12.1 +/-    1.20  0.200 / 0.250
G14     260.4          63.4                7.4 +/-    0.81       8.2 +/-    0.81  0.210 / 0.330
G21     153.5          15.4               11.2 +/-    3.66      27.5 +/-    3.66  0.110 / 0.260
G24     40.9           12.3                5.7 +/-    1.47      15.2 +/-    1.47  0.090 / 0.210
G27     232.6          17.1                6.7 +/-    1.61      15.9 +/-    1.61  0.040 / 0.060
G31     178.4          28.6               10.8 +/-    2.02      19.4 +/-    2.02  0.040 / 0.050
G32     333.4          75.0                7.8 +/-    0.36       8.0 +/-    0.36  0.130 / 0.140