Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 4 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/19/2020   22:38:01   (   0.02,-137.19) (   0.00,-137.38)   21.00                80
 04/22/2020   10:43:16   (  -0.02,-137.18) (   0.14,-137.99)   91.95                80
 04/23/2020   10:21:40   (  -0.02,-137.18) (  -0.85,-133.41)  429.29                80
 04/24/2020   22:43:18   (   0.02,-137.17) (  -0.33,-138.63)  167.55                80
 04/25/2020   22:27:03   (   0.02,-137.16) (   0.73,-134.06)  353.29                80
 04/27/2020   10:48:33   (  -0.01,-137.14) (   0.46,-139.25)  240.93                80
 04/28/2020   10:26:57   (  -0.01,-137.12) (  -0.59,-134.68)  279.26                80
 04/29/2020   22:48:36   (   0.01,-137.10) (  -0.59,-139.91)  319.45                80
 04/30/2020   22:32:19   (   0.01,-137.08) (   0.40,-135.32)  200.44                80
 05/02/2020   10:53:50   (  -0.00,-137.05) (   0.78,-140.51)  394.93                80