PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/08/27-17:12:40
G02     232.3          71.0               12.9 +/-    0.27      13.5 +/-    0.27  0.060 / 0.090
G05     176.7          10.3               -4.8 +/-   28.24     -13.2 +/-   28.24  0.070 / 0.090
G06     41.9           61.7               11.9 +/-    0.67      13.3 +/-    0.67  0.040 / 0.060
G12     321.6          49.4               11.0 +/-    1.11      14.0 +/-    1.11  0.040 / 0.050
G17     70.3           21.7                9.4 +/-    0.71      19.8 +/-    0.71  0.110 / 0.340
G19     56.2           38.7               11.2 +/-    0.92      16.7 +/-    0.92  0.100 / 0.330
G24     250.6          36.7               12.4 +/-    0.76      19.1 +/-    0.76  0.100 / 0.190
G25     316.4          13.6               10.8 +/-    3.51      27.7 +/-    3.51  0.070 / 0.190