PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-19:42:50
G01     63.9           31.7               10.2 +/-    1.40      17.3 +/-    1.40  0.080 / 0.090
G07     140.7          25.9               14.3 +/-    0.85      27.4 +/-    0.85  0.110 / 0.090
G11     50.4           27.1                9.1 +/-    1.82      17.0 +/-    1.82  0.040 / 0.030
G13     267.0          36.3               14.7 +/-    1.38      22.9 +/-    1.38  0.040 / 0.040
G15     297.6          15.9               10.5 +/-    1.28      25.6 +/-    1.28  0.100 / 0.290
G17     244.0          70.9               14.8 +/-    0.74      15.6 +/-    0.74  0.080 / 0.190
G18     44.8           15.2               10.0 +/-    1.32      24.6 +/-    1.32  0.050 / 0.040
G19     229.1          46.0               15.7 +/-    2.21      20.8 +/-    2.21  0.040 / 0.050
G28     30.4           57.6               13.9 +/-    0.93      16.2 +/-    0.93  0.080 / 0.110
G30     141.0          55.0               14.2 +/-    0.35      17.0 +/-    0.35  0.060 / 0.130