PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/13-21:42:50
G01     76.5           33.3               13.7 +/-    1.30      22.4 +/-    1.30  0.090 / 0.120
G07     134.5          35.9               14.8 +/-    1.03      23.2 +/-    1.03  0.090 / 0.100
G11     58.7           35.3               12.6 +/-    1.12      19.9 +/-    1.12  0.100 / 0.050
G13     281.1          37.6               12.7 +/-    1.97      19.2 +/-    1.97  0.080 / 0.040
G15     306.5          14.3               10.0 +/-    4.35      25.3 +/-    4.35  0.330 / 0.230
G17     225.6          59.8               12.6 +/-    1.76      14.3 +/-    1.76  0.130 / 0.230
G18     53.5           20.7               12.0 +/-    6.76      26.0 +/-    6.76  0.030 / 0.020
G19     220.9          36.9               16.1 +/-    1.27      24.7 +/-    1.27  0.030 / 0.010
G28     11.8           60.2               13.2 +/-    1.46      15.0 +/-    1.46  0.050 / 0.030
G30     129.8          64.3               15.3 +/-    0.38      16.8 +/-    0.38  0.090 / 0.050