PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/27-16:27:50
G07     15.6           68.2               12.1 +/-    0.66      12.9 +/-    0.66  0.040 / 0.060
G08     64.5           49.4               12.5 +/-    0.65      15.8 +/-    0.65  0.050 / 0.060
G09     179.6          49.1               15.9 +/-    2.25      20.3 +/-    2.25  0.030 / 0.040
G11     130.6          27.6               15.0 +/-    0.97      27.6 +/-    0.97  0.030 / 0.030
G18     114.6          10.3               -4.3 +/-   33.11     -12.0 +/-   33.11  0.040 / 0.060
G23     158.8          15.7               13.2 +/-    0.92      32.3 +/-    0.92  0.050 / 0.060
G27     40.3           16.6               10.5 +/-    1.44      25.2 +/-    1.44  0.050 / 0.100
G28     259.6          45.9               15.7 +/-    0.83      20.9 +/-    0.83  0.040 / 0.080
G30     321.1          51.3               13.7 +/-    1.00      17.1 +/-    1.00  0.110 / 0.220