PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/17-15:57:30
G07     318.3          51.8               10.7 +/-    0.82      13.1 +/-    0.82  0.040 / 0.050
G08     119.0          47.4               12.9 +/-    0.56      16.8 +/-    0.56  0.040 / 0.040
G09     232.7          82.5               10.9 +/-    0.64      11.0 +/-    0.64  0.030 / 0.040
G16     44.0           14.0                8.8 +/-    2.56      22.5 +/-    2.56  0.050 / 0.060
G23     149.7          48.1               12.5 +/-    0.68      16.1 +/-    0.68  0.080 / 0.120
G27     66.0           35.7                9.5 +/-    1.11      15.0 +/-    1.11  0.070 / 0.120
G28     230.0          21.3               16.1 +/-    2.86      34.2 +/-    2.86  0.110 / 0.300
G30     294.2          29.0                9.4 +/-    2.27      16.8 +/-    2.27  0.150 / 0.300