PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/15-02:27:50
G01     309.6          31.1                9.6 +/-    1.26      16.4 +/-    1.26  0.040 / 0.040
G10     102.1          43.3               10.4 +/-    0.59      14.4 +/-    0.59  0.030 / 0.030
G11     283.9          29.2               11.0 +/-    0.71      19.6 +/-    0.71  0.040 / 0.040
G14     353.4          67.9                9.3 +/-    0.59       9.9 +/-    0.59  0.050 / 0.040
G18     114.9          17.2                9.1 +/-    1.34      21.4 +/-    1.34  0.070 / 0.120
G22     308.2          22.8                9.1 +/-    3.21      18.7 +/-    3.21  0.140 / 0.110
G25     82.3           15.2                9.8 +/-    2.10      24.3 +/-    2.10  0.080 / 0.130
G31     172.7          59.7               13.9 +/-    0.88      15.9 +/-    0.88  0.070 / 0.120
G32     28.9           56.9                9.0 +/-    1.09      10.5 +/-    1.09  0.030 / 0.040