PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/22-16:58:10
G03     186.7          13.4               11.6 +/-    3.27      30.1 +/-    3.27  0.060 / 0.140
G07     297.1          41.0               11.0 +/-    0.96      15.8 +/-    0.96  0.060 / 0.100
G08     140.2          32.6               14.2 +/-    1.22      23.6 +/-    1.22  0.050 / 0.050
G09     317.4          69.5               12.6 +/-    0.56      13.3 +/-    0.56  0.030 / 0.050
G16     41.7           30.9               10.1 +/-    0.63      17.4 +/-    0.63  0.040 / 0.090
G23     133.7          67.7               12.5 +/-    1.15      13.4 +/-    1.15  0.050 / 0.100
G27     90.1           36.1               13.1 +/-    0.35      20.4 +/-    0.35  0.060 / 0.130
G30     279.7          18.1               11.1 +/-    2.30      25.5 +/-    2.30  0.060 / 0.110