PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/12-21:57:40
G02     201.7          30.3               14.5 +/-    1.33      25.3 +/-    1.33  0.300 / 0.240
G06     163.9          64.5               13.1 +/-    0.24      14.4 +/-    0.24  0.300 / 0.280
G12     305.0          12.1                7.9 +/-   11.50      20.9 +/-   11.50  0.130 / 0.110
G17     27.5           55.6               12.0 +/-    1.01      14.2 +/-    1.01  0.100 / 0.090
G19     345.8          68.2               11.2 +/-    0.41      12.0 +/-    0.41  0.050 / 0.100
G24     302.8          35.6               12.6 +/-    2.17      19.8 +/-    2.17  0.050 / 0.100
G28     97.9           34.1               13.4 +/-    0.71      21.7 +/-    0.71  0.050 / 0.030