Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 1 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/12/2020   10:56:00   (   0.04,-137.18) (   0.95,-141.23)  461.42                80
 01/13/2020   10:34:24   (   0.04,-137.17) (  -0.08,-136.66)   58.88                80
 01/15/2020   22:39:48   (  -0.04,-137.14) (  -0.08,-137.31)   19.40                80
 01/18/2020   10:42:23   (   0.04,-137.11) (   0.24,-137.93)   93.99                80
 01/19/2020   10:20:48   (   0.04,-137.09) (  -0.79,-133.36)  425.62                80
 01/20/2020   22:45:07   (  -0.05,-137.06) (  -0.40,-138.59)  174.11                80
 01/21/2020   22:23:31   (  -0.05,-137.04) (   0.63,-134.01)  345.25                80
 01/23/2020   10:47:42   (   0.06,-137.01) (   0.55,-139.21)  250.28                80
 01/24/2020   10:26:06   (   0.06,-136.99) (  -0.48,-134.63)  268.66                80