Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 9 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/06/2021   23:03:47   (  -0.04,-137.19) (  -0.89,-141.08)  442.64                80
 09/07/2021   22:47:29   (  -0.04,-137.18) (   0.11,-136.48)   80.01                80
 09/10/2021   10:49:59   (   0.04,-137.16) (  -0.01,-137.07)   11.42                80
 09/12/2021   22:49:55   (  -0.04,-137.13) (  -0.14,-137.68)   62.91                80
 09/13/2021   22:33:37   (  -0.04,-137.11) (   0.86,-133.09)  458.47                80
 09/15/2021   10:52:24   (   0.03,-137.08) (   0.30,-138.26)  134.92                80
 09/16/2021   10:36:07   (   0.02,-137.06) (  -0.76,-133.68)  385.98                80
 09/17/2021   22:55:01   (  -0.01,-137.03) (  -0.46,-138.87)  211.24                80
 09/18/2021   22:38:44   (  -0.01,-137.00) (   0.61,-134.29)  309.69                80