PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/13-17:57:50
G08     304.3          20.8                9.4 +/-    1.12      20.4 +/-    1.12  0.070 / 0.070
G10     342.3          61.3                8.2 +/-    0.30       9.2 +/-    0.30  0.080 / 0.070
G14     221.7          36.5               12.9 +/-    1.06      20.0 +/-    1.06  0.060 / 0.070
G18     50.5           55.5                9.9 +/-    0.80      11.7 +/-    0.80  0.050 / 0.060
G24     68.5           29.9                9.6 +/-    0.91      16.9 +/-    0.91  0.080 / 0.070
G27     265.7          36.1               12.6 +/-    1.73      19.7 +/-    1.73  0.070 / 0.050
G32     229.3          56.9               11.3 +/-    2.26      13.2 +/-    2.26  0.110 / 0.360