PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/20-19:12:50
G01     75.8           33.3                9.9 +/-    1.40      16.2 +/-    1.40  0.100 / 0.250
G07     134.9          35.2               12.6 +/-    1.21      20.0 +/-    1.21  0.130 / 0.230
G11     57.4           34.1                9.8 +/-    2.07      15.8 +/-    2.07  0.030 / 0.030
G13     279.9          37.8               12.8 +/-    2.14      19.4 +/-    2.14  0.040 / 0.030
G15     306.6          14.0                9.1 +/-    1.85      23.2 +/-    1.85  0.320 / 0.240
G17     226.5          62.1               13.5 +/-    1.13      15.1 +/-    1.13  0.150 / 0.360
G18     52.7           20.3                9.6 +/-    6.71      20.9 +/-    6.71  0.050 / 0.080
G19     221.3          36.6               13.7 +/-    1.34      21.0 +/-    1.34  0.050 / 0.080
G28     12.5           60.1               10.9 +/-    1.44      12.4 +/-    1.44  0.030 / 0.040
G30     130.6          65.0               11.9 +/-    0.52      12.9 +/-    0.52  0.040 / 0.050