PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/16-23:57:50
G03     214.9          58.8                5.9 +/-    1.75       6.8 +/-    1.75  0.050 / 0.050
G07     256.5          15.1                5.6 +/-    2.76      14.0 +/-    2.76  0.060 / 0.060
G09     309.8          27.1                4.8 +/-    2.08       9.0 +/-    2.08  0.070 / 0.130
G16     107.1          65.8                8.1 +/-    0.96       8.8 +/-    0.96  0.180 / 0.110
G22     189.4          43.3                6.4 +/-    0.46       8.8 +/-    0.46  0.030 / 0.030
G23     328.6          58.5                4.7 +/-    0.73       5.4 +/-    0.73  0.040 / 0.030
G26     55.6           45.8                4.3 +/-    0.76       5.7 +/-    0.76  0.140 / 0.110
G27     133.6          10.5               -2.0 +/-   29.69      -5.4 +/-   29.69  0.080 / 0.080
G31     58.3           12.5                2.8 +/-    1.89       7.5 +/-    1.89  0.210 / 0.310