PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/13-21:58:00
G01     68.2           32.6               13.2 +/-    0.64      21.9 +/-    0.64  0.120 / 0.090
G07     138.7          29.5               15.2 +/-    0.88      26.9 +/-    0.88  0.120 / 0.110
G11     53.3           30.7               12.1 +/-    1.31      21.0 +/-    1.31  0.050 / 0.030
G13     272.1          37.1               14.6 +/-    2.40      22.3 +/-    2.40  0.050 / 0.060
G15     300.4          15.8               10.3 +/-    1.78      25.0 +/-    1.78  0.100 / 0.180
G17     235.4          66.2               12.4 +/-    0.68      13.5 +/-    0.68  0.100 / 0.170
G18     47.7           17.4               11.1 +/-    2.03      25.9 +/-    2.03  0.030 / 0.010
G19     226.0          43.4               16.3 +/-    1.82      22.5 +/-    1.82  0.030 / 0.010
G28     24.3           58.6               12.5 +/-    2.29      14.4 +/-    2.29  0.060 / 0.040
G30     137.5          57.5               15.6 +/-    0.66      18.1 +/-    0.66  0.060 / 0.030