PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/28-18:28:00
G01     320.5          13.1                8.0 +/-    1.26      20.8 +/-    1.26  0.170 / 0.370
G08     263.1          15.8               11.4 +/-    1.71      27.9 +/-    1.71  0.190 / 0.390
G10     69.7           56.7               11.5 +/-    0.46      13.5 +/-    0.46  0.060 / 0.080
G11     308.6          19.5                9.2 +/-    1.21      20.5 +/-    1.21  0.060 / 0.070
G14     279.8          68.6               12.0 +/-    0.53      12.8 +/-    0.53  0.030 / 0.040
G18     97.7           31.2               10.4 +/-    1.73      17.7 +/-    1.73  0.030 / 0.030
G27     227.0          12.0                9.5 +/-    2.21      25.4 +/-    2.21  0.030 / 0.020
G31     178.3          34.8               11.5 +/-    0.59      18.3 +/-    0.59  0.020 / 0.020
G32     352.8          71.4               12.0 +/-    0.64      12.6 +/-    0.64  0.150 / 0.350