Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 7 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/30/2020   22:05:09   (   0.02,-128.35) (  -0.09,-128.85)   57.01                80
 07/31/2020   21:48:53   (   0.01,-128.34) (   0.92,-124.27)  464.32                80
 08/02/2020   10:10:23   (  -0.01,-128.39) (   0.23,-129.46)  122.71                80
 08/03/2020   09:48:47   (  -0.01,-128.38) (  -0.78,-124.88)  398.30                80
 08/04/2020   22:10:25   (   0.01,-128.30) (  -0.37,-130.11)  205.06                80
 08/05/2020   21:54:09   (   0.01,-128.30) (   0.65,-125.53)  316.08                80
 08/07/2020   10:15:39   (  -0.01,-128.34) (   0.51,-130.72)  271.07                80
 08/08/2020   09:54:02   (  -0.00,-128.33) (  -0.50,-126.14)  249.80                80
 08/09/2020   22:15:40   (   0.00,-128.25) (  -0.69,-131.36)  354.14                80
 08/10/2020   21:59:23   (   0.00,-128.24) (   0.32,-126.77)  166.53                80
 08/12/2020   10:20:54   (  -0.00,-128.27) (   0.84,-131.97)  421.34                80