Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 9 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)
 09/02/2021   22:42:23   (  -0.05,-137.20) (   0.41,-135.29)  218.82                80
 09/04/2021   11:01:10   (   0.04,-137.19) (   0.77,-140.46)  372.17                80
 09/05/2021   10:44:52   (   0.04,-137.19) (  -0.24,-135.87)  150.44                80
 09/06/2021   23:03:47   (  -0.03,-137.18) (  -0.92,-141.07)  443.96                80
 09/07/2021   22:47:29   (  -0.03,-137.17) (   0.14,-136.49)   78.51                80
 09/10/2021   10:49:58   (   0.03,-137.15) (   0.02,-137.07)    8.85                80
 09/12/2021   22:49:55   (  -0.03,-137.11) (  -0.17,-137.68)   65.45                80
 09/13/2021   22:33:38   (  -0.03,-137.09) (   0.90,-133.10)  455.71                80
 09/15/2021   10:52:25   (   0.02,-137.05) (   0.27,-138.27)  138.15                80