PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/22-21:42:30
G07     319.2          52.2               12.3 +/-    0.53      15.1 +/-    0.53  0.100 / 0.210
G08     118.3          47.8               15.0 +/-    0.67      19.5 +/-    0.67  0.100 / 0.190
G09     237.0          82.2               13.7 +/-    0.37      13.8 +/-    0.37  0.060 / 0.060
G16     43.9           15.5               10.7 +/-    2.00      26.3 +/-    2.00  0.070 / 0.060
G23     150.9          50.4               14.7 +/-    0.35      18.4 +/-    0.35  0.040 / 0.050
G27     64.7           35.2               11.9 +/-    0.90      18.8 +/-    0.90  0.030 / 0.070
G28     230.5          22.3               15.0 +/-    3.28      31.3 +/-    3.28  0.300 / 0.300
G30     296.4          32.2               12.6 +/-    2.06      21.2 +/-    2.06  0.190 / 0.350