Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 9 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/13/2020   22:52:59   (  -0.04,-137.20) (  -0.79,-140.56)  382.95                80
 09/14/2020   22:36:43   (  -0.04,-137.19) (   0.23,-135.97)  138.98                80
 09/16/2020   10:55:33   (   0.03,-137.19) (   0.90,-141.17)  453.41                80
 09/17/2020   10:39:17   (   0.03,-137.19) (  -0.12,-136.59)   68.32                80
 09/19/2020   22:39:18   (  -0.03,-137.17) (  -0.02,-137.24)    7.04                80
 09/22/2020   10:41:51   (   0.03,-137.15) (   0.18,-137.84)   79.01                80
 09/23/2020   10:25:35   (   0.03,-137.13) (  -0.85,-133.26)  441.64                80
 09/24/2020   22:44:33   (  -0.02,-137.11) (  -0.32,-138.49)  156.55                80
 09/25/2020   22:28:17   (  -0.02,-137.10) (   0.70,-133.90)  363.76                80