PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/07-11:13:00
G10     241.6          17.8                3.8 +/-    1.80       8.9 +/-    1.80  0.200 / 0.300
G13     66.6           35.6                3.2 +/-    0.48       5.1 +/-    0.48  0.200 / 0.250
G15     107.1          56.0                7.1 +/-    0.51       8.4 +/-    0.51  0.040 / 0.050
G16     308.6          13.6                3.4 +/-    1.85       8.7 +/-    1.85  0.040 / 0.050
G20     27.9           63.8                5.0 +/-    0.52       5.5 +/-    0.52  0.030 / 0.040
G21     323.6          54.4                4.1 +/-    1.23       4.9 +/-    1.23  0.030 / 0.040
G26     279.6          19.1                3.9 +/-    1.14       8.9 +/-    1.14  0.040 / 0.070
G29     159.5          61.1                7.3 +/-    0.73       8.2 +/-    0.73  0.030 / 0.050