Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 1 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)
 01/31/2021   11:01:19   (  -0.03,-137.25) (   0.91,-141.30)  462.72                80
 02/01/2021   10:39:43   (  -0.03,-137.25) (  -0.15,-136.73)   60.39                80
 02/03/2021   22:42:23   (   0.03,-137.26) (  -0.02,-137.35)   11.49                80
 02/06/2021   10:47:34   (  -0.02,-137.25) (   0.16,-137.94)   79.37                80
 02/07/2021   10:25:56   (   0.01,-137.25) (  -0.84,-133.35)  443.25                80
 02/08/2021   22:47:33   (  -0.01,-137.24) (  -0.34,-138.57)  152.86                80
 02/09/2021   22:31:17   (  -0.01,-137.23) (   0.73,-133.99)  368.90                80
 02/11/2021   10:52:45   (   0.01,-137.22) (   0.42,-139.18)  222.94                80
 02/12/2021   10:31:08   (   0.00,-137.21) (  -0.59,-134.59)  298.67                80