PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/07-16:27:50
G02     232.6          71.6               13.3 +/-    0.49      13.9 +/-    0.49  0.030 / 0.060
G05     176.6          10.4               -2.5 +/-   31.64      -6.9 +/-   31.64  0.030 / 0.070
G06     41.8           62.1               12.1 +/-    0.72      13.4 +/-    0.72  0.060 / 0.100
G12     321.6          49.1               11.4 +/-    0.96      14.6 +/-    0.96  0.060 / 0.100
G17     70.3           21.7               10.2 +/-    1.06      21.6 +/-    1.06  0.030 / 0.040
G19     56.2           38.8               11.5 +/-    0.57      17.1 +/-    0.57  0.030 / 0.040
G24     250.6          36.7               12.7 +/-    0.48      19.5 +/-    0.48  0.080 / 0.230
G25     316.4          13.1               10.4 +/-    2.89      27.0 +/-    2.89  0.070 / 0.200