PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/25-15:27:50
G08     318.2          13.8                2.9 +/-    1.36       7.4 +/-    1.36  0.030 / 0.050
G10     309.2          55.5                3.5 +/-    0.63       4.2 +/-    0.63  0.040 / 0.040
G14     212.0          18.9                4.4 +/-    3.82      10.0 +/-    3.82  0.060 / 0.120
G15     45.6           22.6                2.6 +/-    0.70       5.3 +/-    0.70  0.080 / 0.130
G20     9.9            64.4                4.7 +/-    0.58       5.2 +/-    0.58  0.150 / 0.490
G21     117.6          65.2                5.6 +/-    0.68       6.1 +/-    0.68  0.140 / 0.440
G24     85.1           27.8                5.8 +/-    1.24      10.6 +/-    1.24  0.040 / 0.040
G27     295.0          35.2                5.9 +/-    1.24       9.3 +/-    1.24  0.050 / 0.030
G32     214.0          37.8                5.8 +/-    1.30       8.8 +/-    1.30  0.060 / 0.080