PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/17-15:12:40
G10     251.1          26.4                7.4 +/-    1.44      14.0 +/-    1.44  0.110 / 0.330
G13     53.8           30.6                6.5 +/-    2.07      11.3 +/-    2.07  0.120 / 0.240
G15     82.8           56.3                8.9 +/-    0.70      10.4 +/-    0.70  0.050 / 0.050
G16     299.1          13.8                3.2 +/-    1.70       8.1 +/-    1.70  0.050 / 0.050
G18     272.2          58.2                7.9 +/-    1.17       9.1 +/-    1.17  0.080 / 0.140
G20     40.9           50.8                7.0 +/-    0.69       8.7 +/-    0.69  0.100 / 0.110
G21     343.3          64.3                7.2 +/-    0.59       7.9 +/-    0.59  0.080 / 0.280
G26     269.6          15.2                5.3 +/-    1.73      13.2 +/-    1.73  0.140 / 0.380
G29     163.0          45.0               10.7 +/-    0.70      14.4 +/-    0.70  0.060 / 0.170