PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/24-17:57:50
G08     283.9          22.3                9.4 +/-    0.71      19.5 +/-    0.71  0.080 / 0.120
G10     27.1           62.9                9.2 +/-    1.21      10.2 +/-    1.21  0.080 / 0.120
G14     240.1          54.6               13.3 +/-    3.24      15.9 +/-    3.24  0.190 / 0.190
G18     76.6           44.4               11.7 +/-    1.22      15.9 +/-    1.22  0.120 / 0.160
G21     149.2          26.0               12.6 +/-    1.27      24.0 +/-    1.27  0.130 / 0.090
G24     49.1           21.6               10.2 +/-    2.34      21.7 +/-    2.34  0.090 / 0.160
G27     243.6          26.0               11.1 +/-    1.57      21.3 +/-    1.57  0.090 / 0.070
G31     182.5          13.7               12.8 +/-    3.53      32.7 +/-    3.53  0.080 / 0.070
G32     270.9          73.6               11.7 +/-    0.51      12.2 +/-    0.51  0.020 / 0.020