PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/30-16:12:30
G07     12.5           67.8               12.2 +/-    0.46      13.0 +/-    0.46  0.040 / 0.060
G08     66.1           49.9               13.2 +/-    0.93      16.7 +/-    0.93  0.040 / 0.050
G09     179.8          50.4               15.1 +/-    1.62      19.0 +/-    1.62  0.040 / 0.040
G11     131.5          26.8               13.2 +/-    1.10      24.7 +/-    1.10  0.030 / 0.040
G23     158.8          17.0               13.2 +/-    1.60      31.3 +/-    1.60  0.040 / 0.050
G27     40.8           17.6               10.6 +/-    0.58      24.6 +/-    0.58  0.040 / 0.060
G28     258.1          45.0               13.3 +/-    0.98      17.9 +/-    0.98  0.090 / 0.190
G30     319.9          50.3               12.9 +/-    0.71      16.3 +/-    0.71  0.090 / 0.160