PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-04:57:40
G10     246.2          22.7                7.7 +/-    1.90      16.0 +/-    1.90  0.120 / 0.420
G13     59.0           32.8                6.1 +/-    1.27      10.1 +/-    1.27  0.090 / 0.350
G15     97.2           57.7                7.8 +/-    1.42       9.1 +/-    1.42  0.030 / 0.040
G16     300.3          15.6                2.7 +/-    3.16       6.6 +/-    3.16  0.040 / 0.040
G20     289.1          67.5                6.5 +/-    0.81       7.0 +/-    0.81  0.070 / 0.140
G21     327.1          56.3                6.0 +/-    0.53       7.1 +/-    0.53  0.070 / 0.150
G26     271.6          17.6                6.5 +/-    1.20      15.2 +/-    1.20  0.040 / 0.030
G29     163.5          56.5                6.6 +/-    0.53       7.7 +/-    0.53  0.040 / 0.030