PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/27-12:42:50
G05     47.8           19.9                3.7 +/-    1.11       8.2 +/-    1.11  0.040 / 0.080
G10     234.5          11.1               -4.4 +/-   33.94     -12.0 +/-   33.94  0.040 / 0.050
G13     78.6           36.0                6.6 +/-    0.60      10.2 +/-    0.60  0.190 / 0.240
G15     129.3          50.6                9.7 +/-    1.17      12.1 +/-    1.17  0.130 / 0.210
G16     317.9          10.2               -6.7 +/-    6.48     -18.6 +/-    6.48  0.280 / 0.450
G20     246.0          35.2                7.4 +/-    1.65      11.7 +/-    1.65  0.220 / 0.410
G21     314.4          48.4                5.4 +/-    0.71       6.9 +/-    0.71  0.060 / 0.100
G25     196.3          10.4                2.9 +/-   10.49       8.1 +/-   10.49  0.050 / 0.110
G26     293.3          19.2                5.5 +/-    1.70      12.4 +/-    1.70  0.100 / 0.160
G29     150.0          73.1                8.6 +/-    0.68       8.9 +/-    0.68  0.070 / 0.160