PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/15-18:27:50
G01     320.2          15.2                6.5 +/-    1.29      16.0 +/-    1.29  0.150 / 0.440
G08     258.4          15.0                7.8 +/-    2.39      19.4 +/-    2.39  0.170 / 0.420
G10     74.7           54.4                6.9 +/-    0.62       8.3 +/-    0.62  0.040 / 0.040
G11     305.0          22.3                6.3 +/-    1.62      13.2 +/-    1.62  0.040 / 0.040
G14     287.4          70.3                7.1 +/-    0.68       7.5 +/-    0.68  0.080 / 0.060
G18     305.8          40.7                6.2 +/-    1.06       8.9 +/-    1.06  0.070 / 0.040
G20     102.4          31.4                7.8 +/-    0.75      13.2 +/-    0.75  0.070 / 0.220
G27     228.7          11.7                7.1 +/-    4.18      19.1 +/-    4.18  0.090 / 0.210
G31     179.7          35.0                9.3 +/-    1.17      14.7 +/-    1.17  0.150 / 0.430
G32     357.4          70.4                7.5 +/-    0.39       7.9 +/-    0.39  0.160 / 0.230