PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/13-06:12:40
G01     70.4           32.8                5.1 +/-    0.43       8.4 +/-    0.43  0.030 / 0.050
G07     137.6          30.2                7.4 +/-    1.35      12.9 +/-    1.35  0.040 / 0.050
G11     54.0           30.6                4.4 +/-    0.83       7.6 +/-    0.83  0.050 / 0.100
G13     275.6          37.0                7.4 +/-    1.41      11.3 +/-    1.41  0.060 / 0.100
G15     301.8          15.8                1.2 +/-    2.46       2.9 +/-    2.46  0.030 / 0.030
G17     235.0          70.4                8.1 +/-    0.84       8.6 +/-    0.84  0.040 / 0.030
G19     224.6          43.7                9.0 +/-    1.27      12.4 +/-    1.27  0.100 / 0.340
G28     21.5           58.9                5.7 +/-    0.46       6.5 +/-    0.46  0.110 / 0.280
G30     135.3          59.8                9.0 +/-    0.58      10.2 +/-    0.58  0.040 / 0.070