PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-18:12:30
G08     299.5          22.0                9.8 +/-    2.20      20.5 +/-    2.20  0.060 / 0.100
G10     352.6          62.4                9.4 +/-    0.74      10.5 +/-    0.74  0.060 / 0.110
G14     225.2          41.1               11.9 +/-    1.98      17.0 +/-    1.98  0.040 / 0.090
G18     57.4           53.0               10.3 +/-    0.77      12.5 +/-    0.77  0.040 / 0.090
G21     142.0          40.8               13.7 +/-    1.16      19.7 +/-    1.16  0.050 / 0.090
G24     63.1           28.7               10.5 +/-    0.48      18.9 +/-    0.48  0.050 / 0.100
G27     259.7          34.3               10.9 +/-    1.07      17.5 +/-    1.07  0.030 / 0.040
G32     235.5          61.5               12.8 +/-    0.42      14.4 +/-    0.42  0.030 / 0.040