Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 4 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/09/2020   22:30:06   (   0.02,-137.21) (   0.54,-134.83)  270.65                80
 04/11/2020   10:51:37   (  -0.02,-137.21) (   0.61,-140.03)  321.42                80
 04/12/2020   10:30:02   (  -0.02,-137.21) (  -0.44,-135.46)  200.02                80
 04/13/2020   22:51:40   (   0.02,-137.20) (  -0.74,-140.69)  396.95                80
 04/14/2020   22:35:23   (   0.02,-137.20) (   0.25,-136.10)  124.42                80
 04/16/2020   10:56:55   (  -0.01,-137.19) (   0.89,-141.30)  468.17                80
 04/17/2020   10:35:18   (  -0.01,-137.19) (  -0.10,-136.72)   52.86                80
 04/19/2020   22:38:01   (   0.00,-137.16) (  -0.02,-137.37)   24.05                80
 04/20/2020   22:21:45   (   0.00,-137.15) (   0.97,-132.79)  496.86                80
 04/22/2020   10:43:16   (  -0.00,-137.14) (   0.18,-137.99)   96.60                80