PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-05:42:40
G05     51.0           11.4                2.4 +/-    2.05       6.5 +/-    2.05  0.090 / 0.280
G10     239.5          15.9                6.8 +/-    1.26      16.4 +/-    1.26  0.080 / 0.300
G13     69.7           35.9                6.0 +/-    0.59       9.4 +/-    0.59  0.120 / 0.310
G15     114.7          55.1                8.8 +/-    0.36      10.5 +/-    0.36  0.120 / 0.390
G16     309.3          14.1                4.3 +/-    1.80      10.8 +/-    1.80  0.030 / 0.050
G20     283.8          70.6                7.4 +/-    0.75       7.8 +/-    0.75  0.040 / 0.060
G21     317.9          50.3                6.5 +/-    0.59       8.1 +/-    0.59  0.090 / 0.120
G26     281.0          20.1                5.0 +/-    1.58      10.9 +/-    1.58  0.080 / 0.050
G29     159.4          66.8                7.3 +/-    1.06       7.9 +/-    1.06  0.040 / 0.020