PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/27-21:42:50
G02     209.9          51.5               16.1 +/-    0.80      19.9 +/-    0.80  0.060 / 0.120
G06     91.1           78.9               13.8 +/-    0.29      14.0 +/-    0.29  0.060 / 0.120
G12     315.7          29.3               11.1 +/-    1.73      19.7 +/-    1.73  0.060 / 0.070
G17     48.3           40.1               10.9 +/-    0.52      15.8 +/-    0.52  0.070 / 0.080
G19     25.9           56.1               11.9 +/-    0.38      14.0 +/-    0.38  0.100 / 0.210
G24     277.0          42.6               11.1 +/-    0.94      15.5 +/-    0.94  0.080 / 0.170
G28     116.5          19.9               13.5 +/-    1.40      29.7 +/-    1.40  0.030 / 0.060