PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/21-19:42:50
G01     311.2          29.6                8.7 +/-    1.17      15.3 +/-    1.17  0.110 / 0.200
G10     100.1          44.3                8.5 +/-    0.66      11.5 +/-    0.66  0.130 / 0.190
G11     288.6          27.5                7.5 +/-    1.68      13.9 +/-    1.68  0.110 / 0.190
G14     344.1          69.0                7.7 +/-    0.42       8.2 +/-    0.42  0.110 / 0.180
G18     114.2          16.6                9.0 +/-    1.82      21.4 +/-    1.82  0.030 / 0.040
G22     307.5          21.3                9.9 +/-    2.72      21.2 +/-    2.72  0.020 / 0.040
G25     87.2           14.9               10.4 +/-    2.01      25.8 +/-    2.01  0.040 / 0.030
G31     172.8          58.0               10.7 +/-    0.52      12.4 +/-    0.52  0.030 / 0.030
G32     29.2           56.8                7.0 +/-    1.10       8.2 +/-    1.10  0.040 / 0.040