PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/25-14:13:00
G10     264.5          37.2                5.9 +/-    1.28       9.0 +/-    1.28  0.040 / 0.040
G13     43.0           19.7                3.0 +/-    1.75       6.7 +/-    1.75  0.030 / 0.030
G15     62.7           51.3                4.2 +/-    0.65       5.2 +/-    0.65  0.160 / 0.360
G16     283.4          12.7                3.0 +/-    1.40       7.8 +/-    1.40  0.160 / 0.410
G20     293.3          59.3                5.2 +/-    0.96       5.9 +/-    0.96  0.190 / 0.240
G21     8.5            71.8                4.1 +/-    0.52       4.2 +/-    0.52  0.170 / 0.240
G24     118.7          13.2                7.4 +/-    2.17      19.2 +/-    2.17  0.090 / 0.060
G27     320.8          14.6                1.3 +/-    3.08       3.2 +/-    3.08  0.070 / 0.080
G29     166.3          32.0                5.6 +/-    0.74       9.3 +/-    0.74  0.150 / 0.270