PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-04:42:50
G10     241.2          17.8                7.7 +/-    2.72      17.8 +/-    2.72  0.090 / 0.480
G13     66.6           35.3                7.4 +/-    0.59      11.6 +/-    0.59  0.120 / 0.410
G15     110.9          56.1                7.6 +/-    0.22       9.0 +/-    0.22  0.130 / 0.310
G16     306.8          14.8                4.9 +/-    1.65      12.3 +/-    1.65  0.140 / 0.340
G20     273.2          64.1                6.0 +/-    0.65       6.6 +/-    0.65  0.050 / 0.070
G21     320.1          51.7                7.3 +/-    1.42       9.0 +/-    1.42  0.050 / 0.070
G26     278.3          19.6                6.2 +/-    1.03      13.9 +/-    1.03  0.030 / 0.030
G29     160.8          64.3                7.9 +/-    1.21       8.6 +/-    1.21  0.030 / 0.040