PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/16-13:27:30
G08     308.0          18.9                3.7 +/-    1.49       8.3 +/-    1.49  0.040 / 0.060
G10     339.0          60.9                2.6 +/-    0.58       3.0 +/-    0.58  0.080 / 0.060
G14     220.6          33.1                5.5 +/-    1.71       9.0 +/-    1.71  0.040 / 0.040
G21     137.8          50.7                6.1 +/-    0.75       7.6 +/-    0.75  0.030 / 0.060
G24     70.0           29.9                4.9 +/-    1.38       8.6 +/-    1.38  0.090 / 0.120
G27     268.3          36.7                6.0 +/-    1.74       9.3 +/-    1.74  0.160 / 0.110
G32     227.5          56.9                5.3 +/-    2.48       6.2 +/-    2.48  0.030 / 0.030