Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 10 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/27/2021   10:55:13   (   0.02,-137.22) (   0.33,-138.61)  157.55                80
 10/28/2021   10:38:55   (   0.02,-137.22) (  -0.69,-134.01)  365.67                80
 10/29/2021   22:57:51   (  -0.01,-137.21) (  -0.44,-139.23)  228.82                80
 10/30/2021   22:41:32   (  -0.01,-137.21) (   0.58,-134.63)  294.21                80
 11/01/2021   11:00:18   (   0.01,-137.20) (   0.62,-139.79)  295.66                80
 11/02/2021   10:43:59   (   0.01,-137.19) (  -0.41,-135.20)  227.04                80
 11/03/2021   23:02:56   (  -0.01,-137.18) (  -0.72,-140.41)  368.48                80
 11/04/2021   22:46:37   (  -0.01,-137.16) (   0.31,-135.82)  153.78                80
 11/06/2021   11:05:22   (   0.01,-137.14) (   0.89,-140.98)  437.50                80
 11/07/2021   10:49:04   (   0.01,-137.12) (  -0.13,-136.38)   84.01                80