PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/27-13:57:50
G10     261.4          35.2                7.6 +/-    0.57      12.0 +/-    0.57  0.040 / 0.040
G13     44.7           22.0                5.6 +/-    3.06      11.8 +/-    3.06  0.040 / 0.030
G15     66.8           53.3                6.5 +/-    0.63       7.8 +/-    0.63  0.130 / 0.400
G16     286.4          13.4                3.9 +/-    1.32      10.1 +/-    1.32  0.120 / 0.460
G20     287.8          57.8                7.0 +/-    1.82       8.1 +/-    1.82  0.050 / 0.080
G21     1.3            70.1                5.3 +/-    1.09       5.6 +/-    1.09  0.070 / 0.080
G24     121.2          11.5                8.9 +/-    2.38      23.9 +/-    2.38  0.230 / 0.250
G27     321.7          12.1                0.6 +/-   13.30       1.7 +/-   13.30  0.220 / 0.230
G29     165.8          35.2                9.9 +/-    1.38      15.6 +/-    1.38  0.190 / 0.340