PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/27-16:27:40
G07     15.6           68.2               14.4 +/-    0.61      15.3 +/-    0.61  0.040 / 0.060
G08     64.5           49.4               13.9 +/-    0.60      17.6 +/-    0.60  0.050 / 0.050
G09     179.6          49.1               17.2 +/-    0.70      21.9 +/-    0.70  0.020 / 0.030
G11     130.6          27.6               13.7 +/-    1.24      25.2 +/-    1.24  0.030 / 0.030
G18     114.6          10.3                5.6 +/-   29.25      15.5 +/-   29.25  0.050 / 0.050
G23     158.8          15.7               12.7 +/-    1.45      31.1 +/-    1.45  0.050 / 0.050
G27     40.3           16.6               11.1 +/-    1.70      26.6 +/-    1.70  0.150 / 0.270
G28     259.6          45.9               16.9 +/-    2.15      22.5 +/-    2.15  0.150 / 0.310
G30     321.1          51.3               14.2 +/-    0.71      17.6 +/-    0.71  0.180 / 0.340