Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 5 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/26/2020   22:37:09   (   0.01,-137.21) (   0.06,-137.07)   16.46                80
 05/29/2020   10:42:23   (  -0.00,-137.21) (   0.08,-137.68)   52.94                80
 05/30/2020   10:20:46   (  -0.00,-137.21) (  -0.92,-133.10)  468.94                80
 05/31/2020   22:42:26   (   0.00,-137.21) (  -0.24,-138.33)  127.74                80
 06/01/2020   22:26:09   (   0.00,-137.20) (   0.76,-133.74)  393.80                80
 06/03/2020   10:47:39   (  -0.00,-137.20) (   0.37,-138.94)  198.53                80
 06/04/2020   10:26:03   (  -0.00,-137.19) (  -0.63,-134.36)  322.60                80
 06/05/2020   22:47:42   (  -0.01,-137.17) (  -0.53,-139.59)  275.31                80
 06/06/2020   22:31:26   (  -0.01,-137.16) (   0.47,-135.01)  245.49                80
 06/08/2020   10:50:15   (   0.02,-137.14) (   0.72,-140.19)  347.92                80