PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/11-20:27:50
G01     56.0           28.9               12.3 +/-    0.90      21.9 +/-    0.90  0.070 / 0.320
G07     144.0          19.0               20.8 +/-    2.27      46.9 +/-    2.27  0.100 / 0.350
G11     47.0           21.4               11.5 +/-    1.21      24.4 +/-    1.21  0.040 / 0.060
G13     258.0          33.6               21.2 +/-    1.56      34.5 +/-    1.56  0.040 / 0.050
G15     290.4          16.2               13.5 +/-    1.31      32.7 +/-    1.31  0.060 / 0.110
G17     266.6          75.6               19.6 +/-    0.68      20.2 +/-    0.68  0.060 / 0.090
G18     40.2           10.6               11.4 +/-    2.16      31.5 +/-    2.16  0.090 / 0.250
G19     237.0          53.0               21.2 +/-    2.10      25.8 +/-    2.10  0.090 / 0.280
G28     42.8           55.2               15.8 +/-    0.50      18.8 +/-    0.50  0.080 / 0.260
G30     146.1          47.1               20.3 +/-    0.78      26.6 +/-    0.78  0.080 / 0.280