PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/31-20:58:00
G01     248.6          34.0               12.2 +/-    1.55      19.8 +/-    1.55  0.040 / 0.040
G03     315.3          46.6                9.8 +/-    1.30      12.9 +/-    1.30  0.050 / 0.030
G11     236.5          11.6               11.9 +/-    2.43      31.9 +/-    2.43  0.100 / 0.210
G14     62.6           39.6                9.5 +/-    1.53      13.9 +/-    1.53  0.110 / 0.210
G16     164.2          18.8                0.6 +/-   19.19       1.4 +/-   19.19  0.030 / 0.030
G22     301.7          67.8               10.1 +/-    0.66      10.8 +/-    0.66  0.030 / 0.040
G23     288.2          20.5                9.8 +/-    2.54      21.3 +/-    2.54  0.090 / 0.140
G26     135.6          39.5               12.3 +/-    0.92      18.1 +/-    0.92  0.110 / 0.160
G31     40.1           57.4                9.3 +/-    0.41      10.8 +/-    0.41  0.040 / 0.100
G32     79.1           21.8                8.0 +/-    1.43      16.8 +/-    1.43  0.050 / 0.080