Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 12 2.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/03/2019   22:53:58   (  -0.00,-137.19) (  -0.82,-140.78)  409.57                80
 12/04/2019   22:32:23   (   0.00,-137.18) (   0.20,-136.21)  111.13                80
 12/06/2019   10:56:35   (   0.00,-137.18) (   0.93,-141.42)  482.44                80
 12/07/2019   10:34:59   (   0.00,-137.17) (  -0.09,-136.84)   37.97                80
 12/09/2019   22:40:22   (  -0.01,-137.14) (  -0.12,-137.49)   40.84                80
 12/10/2019   22:18:48   (  -0.01,-137.12) (   0.96,-132.93)  479.01                80
 12/12/2019   10:42:59   (   0.02,-137.10) (   0.23,-138.12)  116.29                80
 12/13/2019   10:21:24   (   0.01,-137.08) (  -0.79,-133.55)  402.77                80
 12/14/2019   22:45:42   (  -0.02,-137.04) (  -0.43,-138.77)  198.01                80
 12/15/2019   22:24:07   (  -0.01,-137.01) (   0.65,-134.21)  320.56                80