PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/31-16:12:50
G07     17.4           68.4               12.8 +/-    0.83      13.6 +/-    0.83  0.060 / 0.040
G08     63.5           48.9               12.3 +/-    0.48      15.8 +/-    0.48  0.070 / 0.060
G09     179.4          48.3               13.9 +/-    1.35      17.9 +/-    1.35  0.030 / 0.030
G11     129.9          28.0               11.9 +/-    1.73      21.7 +/-    1.73  0.040 / 0.030
G18     114.1          10.7               12.0 +/-    4.86      33.0 +/-    4.86  0.050 / 0.050
G23     158.9          15.3               11.7 +/-    1.49      28.9 +/-    1.49  0.030 / 0.040
G27     40.0           16.2               10.7 +/-    1.95      26.0 +/-    1.95  0.140 / 0.300
G28     260.3          46.2               14.2 +/-    3.28      18.8 +/-    3.28  0.170 / 0.460
G30     321.6          51.7               12.2 +/-    0.46      15.0 +/-    0.46  0.190 / 0.370