PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/31-16:13:00
G07     17.4           68.4               10.0 +/-    0.78      10.7 +/-    0.78  0.060 / 0.050
G08     63.5           48.9               11.3 +/-    0.50      14.4 +/-    0.50  0.050 / 0.060
G09     179.4          48.3               13.9 +/-    2.14      17.9 +/-    2.14  0.040 / 0.050
G11     129.9          28.0               13.1 +/-    2.11      24.0 +/-    2.11  0.040 / 0.050
G18     114.1          10.7                1.0 +/-   31.65       2.7 +/-   31.65  0.040 / 0.050
G23     158.9          15.3               12.4 +/-    1.41      30.7 +/-    1.41  0.040 / 0.050
G27     40.0           16.2               10.0 +/-    1.87      24.1 +/-    1.87  0.050 / 0.090
G28     260.3          46.2               13.8 +/-    0.70      18.2 +/-    0.70  0.060 / 0.100
G30     321.6          51.7               12.5 +/-    0.92      15.5 +/-    0.92  0.130 / 0.250