PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-17:27:50
G08     312.9          17.0                7.8 +/-    2.36      18.4 +/-    2.36  0.070 / 0.060
G10     323.3          58.4                8.2 +/-    0.40       9.4 +/-    0.40  0.070 / 0.060
G14     216.3          27.3               10.8 +/-    2.09      20.0 +/-    2.09  0.060 / 0.090
G15     46.1           12.7                8.1 +/-    2.48      21.2 +/-    2.48  0.060 / 0.090
G18     35.1           60.0                9.6 +/-    0.71      10.9 +/-    0.71  0.130 / 0.150
G20     82.4           10.0               10.4 +/-    4.35      29.1 +/-    4.35  0.080 / 0.170
G21     130.4          54.8               13.2 +/-    0.53      15.7 +/-    0.53  0.090 / 0.060
G24     79.9           30.5                7.8 +/-    1.47      13.4 +/-    1.47  0.070 / 0.080
G27     278.5          38.0                9.8 +/-    2.54      14.8 +/-    2.54  0.030 / 0.030
G32     220.3          47.4               11.9 +/-    2.27      15.5 +/-    2.27  0.030 / 0.030