Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 12 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/31/2021   10:50:51   (  -0.02,-137.22) (  -0.17,-136.44)   88.68                80
 01/02/2022   22:52:19   (   0.01,-137.20) (  -0.04,-137.42)   24.39                80
 01/03/2022   22:36:36   (   0.01,-137.20) (   0.97,-132.97)  481.97                80
 01/05/2022   10:56:18   (  -0.01,-137.19) (   0.24,-138.36)  133.72                80
 01/06/2022   10:40:35   (  -0.01,-137.18) (  -0.77,-133.92)  372.40                80
 01/07/2022   23:00:24   (   0.02,-137.17) (  -0.49,-139.34)  247.93                80
 01/08/2022   22:44:42   (   0.02,-137.16) (   0.52,-134.89)  258.22                80
 01/10/2022   11:04:23   (  -0.01,-137.15) (   0.69,-140.28)  357.69                80
 01/11/2022   10:48:41   (  -0.01,-137.13) (  -0.31,-135.84)  148.22                80
 01/12/2022   23:08:30   (  -0.00,-137.11) (  -0.92,-141.26)  472.59                80