PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/25-17:27:50
G08     266.4          18.9                7.9 +/-    1.63      17.8 +/-    1.63  0.160 / 0.360
G10     59.7           58.3                7.3 +/-    0.53       8.5 +/-    0.53  0.110 / 0.400
G11     311.6          17.4                6.0 +/-    1.59      14.0 +/-    1.59  0.090 / 0.240
G14     264.7          66.3                7.0 +/-    1.01       7.6 +/-    1.01  0.080 / 0.220
G18     311.8          34.0                6.6 +/-    1.85      10.7 +/-    1.85  0.080 / 0.060
G20     94.3           37.3                7.4 +/-    0.58      11.2 +/-    0.58  0.070 / 0.050
G21     153.6          13.2                8.8 +/-    4.16      22.7 +/-    4.16  0.030 / 0.040
G27     235.3          17.4                8.3 +/-    1.94      19.5 +/-    1.94  0.030 / 0.030
G31     181.5          25.5                9.1 +/-    2.79      17.6 +/-    2.79  0.150 / 0.310
G32     329.1          74.9                7.9 +/-    0.59       8.1 +/-    0.59  0.140 / 0.310