PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/25-17:27:50
G01     117.9          18.9               13.8 +/-    1.67      31.3 +/-    1.67  0.040 / 0.080
G07     83.5           66.2               12.6 +/-    0.40      13.7 +/-    0.40  0.080 / 0.090
G08     44.9           32.1               10.1 +/-    1.11      16.9 +/-    1.11  0.040 / 0.040
G09     176.7          24.5               13.2 +/-    1.12      26.0 +/-    1.12  0.030 / 0.030
G11     105.9          40.5               12.7 +/-    0.71      18.3 +/-    0.71  0.030 / 0.030
G13     317.0          20.4               12.1 +/-    1.94      26.3 +/-    1.94  0.030 / 0.030
G17     202.9          23.6               13.1 +/-    1.55      26.5 +/-    1.55  0.110 / 0.180
G18     93.1           21.4               12.0 +/-    1.01      25.5 +/-    1.01  0.140 / 0.220
G28     295.7          58.0               11.9 +/-    1.36      13.8 +/-    1.36  0.140 / 0.260
G30     350.8          70.2               12.4 +/-    0.61      13.1 +/-    0.61  0.100 / 0.190