PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/22-21:27:50
G01     252.1          35.7               10.1 +/-    2.13      15.8 +/-    2.13  0.030 / 0.030
G03     316.0          43.2                7.4 +/-    0.84      10.2 +/-    0.84  0.030 / 0.030
G11     238.6          13.2                7.4 +/-    1.76      19.3 +/-    1.76  0.030 / 0.030
G14     59.6           41.2                5.7 +/-    1.44       8.1 +/-    1.44  0.030 / 0.030
G22     306.0          64.9                7.5 +/-    0.55       8.2 +/-    0.55  0.130 / 0.290
G23     285.8          18.4                9.8 +/-    1.06      22.4 +/-    1.06  0.060 / 0.270
G25     40.3           10.6                7.3 +/-    4.42      20.1 +/-    4.42  0.060 / 0.080
G26     138.8          36.8                9.6 +/-    0.75      14.7 +/-    0.75  0.080 / 0.080
G31     40.7           61.0                6.9 +/-    0.51       7.7 +/-    0.51  0.060 / 0.110
G32     76.4           23.9                6.6 +/-    1.34      13.2 +/-    1.34  0.060 / 0.100