PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/22-23:27:50
G01     68.2           32.6               15.5 +/-    1.11      25.8 +/-    1.11  0.040 / 0.060
G07     138.7          29.4               17.5 +/-    1.05      31.0 +/-    1.05  0.050 / 0.080
G11     53.7           31.2               13.6 +/-    1.39      23.3 +/-    1.39  0.030 / 0.050
G13     272.3          37.0               17.8 +/-    2.48      27.3 +/-    2.48  0.030 / 0.050
G15     300.1          16.0               12.4 +/-    1.74      30.0 +/-    1.74  0.030 / 0.030
G17     236.1          67.5               18.1 +/-    0.45      19.5 +/-    0.45  0.030 / 0.040
G18     332.7          -18.8              25.8 +/-    2.72      58.6 +/-    2.72  0.070 / 0.090
G19     226.0          43.8               19.3 +/-    2.16      26.4 +/-    2.16  0.090 / 0.090
G28     24.4           58.5               16.1 +/-    2.40      18.5 +/-    2.40  0.050 / 0.110
G30     137.4          56.6               18.2 +/-    0.58      21.4 +/-    0.58  0.100 / 0.100