PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-15:27:50
G10     249.0          24.7                9.2 +/-    1.80      18.1 +/-    1.80  0.030 / 0.050
G13     56.2           31.9                7.9 +/-    0.66      13.2 +/-    0.66  0.040 / 0.040
G15     87.7           56.8               10.4 +/-    0.40      12.1 +/-    0.40  0.150 / 0.380
G16     301.7          13.7                6.4 +/-    1.57      16.5 +/-    1.57  0.130 / 0.410
G18     268.3          56.6               10.6 +/-    1.10      12.5 +/-    1.10  0.040 / 0.060
G20     39.2           52.7                7.3 +/-    0.44       8.9 +/-    0.44  0.030 / 0.060
G21     339.7          62.8                8.2 +/-    0.51       9.1 +/-    0.51  0.100 / 0.370
G26     272.1          16.0                8.9 +/-    2.02      21.7 +/-    2.02  0.110 / 0.320
G29     162.1          47.5               12.6 +/-    0.89      16.5 +/-    0.89  0.050 / 0.110