PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/31-15:12:50
G07     325.6          55.0               11.5 +/-    0.94      13.7 +/-    0.94  0.040 / 0.050
G08     109.6          50.5               13.6 +/-    0.41      17.1 +/-    0.41  0.040 / 0.050
G09     200.5          78.2               12.3 +/-    0.78      12.5 +/-    0.78  0.060 / 0.050
G11     149.3          10.2               -5.0 +/-   21.33     -13.8 +/-   21.33  0.050 / 0.060
G23     152.6          43.0               12.8 +/-    1.59      17.7 +/-    1.59  0.070 / 0.120
G27     59.7           33.8               11.1 +/-    0.66      18.0 +/-    0.66  0.060 / 0.140
G28     233.8          25.9               14.8 +/-    1.25      28.4 +/-    1.25  0.060 / 0.210
G30     298.4          32.3               10.7 +/-    1.46      17.9 +/-    1.46  0.110 / 0.180