PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/15-16:43:10
G02     339.0          79.1               14.4 +/-    0.73      14.6 +/-    0.73  0.070 / 0.120
G05     168.3          30.8               18.6 +/-    1.02      32.1 +/-    1.02  0.100 / 0.120
G06     41.7           40.8               11.1 +/-    0.92      15.9 +/-    0.92  0.030 / 0.030
G12     310.5          71.4               11.7 +/-    0.63      12.2 +/-    0.63  0.030 / 0.030
G19     76.9           25.3               12.4 +/-    2.15      24.0 +/-    2.15  0.070 / 0.100
G24     229.6          22.9               16.3 +/-    2.13      33.4 +/-    2.13  0.050 / 0.080
G25     316.9          32.4               11.4 +/-    1.68      19.0 +/-    1.68  0.220 / 0.210
G29     288.0          11.9                8.3 +/-   18.21      22.1 +/-   18.21  0.150 / 0.270