PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/18-21:57:50
G01     311.1          29.7                8.3 +/-    1.02      14.6 +/-    1.02  0.090 / 0.240
G10     100.0          44.4               10.0 +/-    0.84      13.6 +/-    0.84  0.130 / 0.240
G11     287.6          28.1                8.5 +/-    2.06      15.5 +/-    2.06  0.090 / 0.110
G14     346.2          68.9                8.4 +/-    0.47       8.9 +/-    0.47  0.070 / 0.130
G18     114.0          17.2               11.5 +/-    1.21      27.1 +/-    1.21  0.200 / 0.210
G22     307.4          20.9                7.7 +/-    3.30      16.5 +/-    3.30  0.090 / 0.150
G25     86.4           14.9               11.9 +/-    2.42      29.7 +/-    2.42  0.040 / 0.040
G31     175.0          56.6               11.3 +/-    0.54      13.3 +/-    0.54  0.030 / 0.030
G32     27.8           57.6                7.6 +/-    1.13       8.8 +/-    1.13  0.030 / 0.030