PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/17-14:28:00
G02     55.6           35.6                7.1 +/-    0.94      11.1 +/-    0.94  0.030 / 0.030
G05     71.5           67.1                9.1 +/-    0.39       9.8 +/-    0.39  0.030 / 0.030
G12     187.7          40.2               12.5 +/-    1.96      18.1 +/-    1.96  0.190 / 0.510
G13     134.1          11.0                7.6 +/-   27.04      20.7 +/-   27.04  0.200 / 0.430
G20     205.6          51.7               12.2 +/-    0.82      15.1 +/-    0.82  0.110 / 0.080
G21     267.6          16.9                9.8 +/-    1.23      23.2 +/-    1.23  0.060 / 0.080
G25     245.2          55.5               11.3 +/-    0.78      13.4 +/-    0.78  0.050 / 0.070
G29     328.7          54.1                6.4 +/-    1.52       7.7 +/-    1.52  0.060 / 0.060