PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/13-16:42:50
G08     309.4          19.7                7.1 +/-    1.00      15.6 +/-    1.00  0.050 / 0.050
G10     329.9          59.7                3.8 +/-    0.97       4.3 +/-    0.97  0.050 / 0.060
G14     216.9          29.8                9.2 +/-    2.23      16.2 +/-    2.23  0.030 / 0.030
G15     46.6           13.0                3.1 +/-    1.69       8.2 +/-    1.69  0.040 / 0.040
G20     34.7           61.0                6.3 +/-    0.95       7.1 +/-    0.95  0.120 / 0.200
G21     132.8          55.4                7.7 +/-    0.44       9.1 +/-    0.44  0.070 / 0.180
G24     71.3           28.1                5.7 +/-    0.97      10.4 +/-    0.97  0.050 / 0.090
G27     280.1          36.8                7.6 +/-    0.70      11.6 +/-    0.70  0.060 / 0.090
G32     221.6          49.8                7.0 +/-    0.58       8.9 +/-    0.58  0.050 / 0.070