PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-19:13:00
G01     82.7           33.1               14.6 +/-    0.87      24.0 +/-    0.87  0.110 / 0.240
G07     130.8          40.4               15.7 +/-    0.91      22.6 +/-    0.91  0.100 / 0.260
G11     62.7           37.5               13.0 +/-    0.48      19.8 +/-    0.48  0.040 / 0.040
G13     287.2          37.3               14.8 +/-    1.31      22.6 +/-    1.31  0.030 / 0.040
G15     311.2          12.2               11.5 +/-    1.10      30.5 +/-    1.10  0.050 / 0.060
G17     220.3          56.5               17.6 +/-    0.69      20.7 +/-    0.69  0.060 / 0.070
G18     57.9           22.5               11.2 +/-    1.41      23.3 +/-    1.41  0.030 / 0.080
G19     217.9          31.4               18.6 +/-    1.16      31.6 +/-    1.16  0.030 / 0.080
G28     1.8            61.1               14.0 +/-    0.71      15.8 +/-    0.71  0.040 / 0.110
G30     121.3          70.2               15.8 +/-    0.75      16.7 +/-    0.75  0.050 / 0.090