Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 7 31.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/31/2020   21:48:53   (   0.01,-128.34) (   0.93,-124.27)  464.19                80
 08/02/2020   10:10:23   (  -0.01,-128.38) (   0.23,-129.46)  123.02                80
 08/03/2020   09:48:47   (  -0.01,-128.37) (  -0.79,-124.88)  397.90                80
 08/04/2020   22:10:24   (   0.01,-128.30) (  -0.42,-130.10)  205.55                80
 08/05/2020   21:54:09   (   0.01,-128.29) (   0.66,-125.53)  315.54                80
 08/07/2020   10:15:39   (  -0.01,-128.33) (   0.51,-130.72)  271.73                80
 08/08/2020   09:54:03   (  -0.01,-128.32) (  -0.51,-126.14)  249.08                80
 08/09/2020   22:15:40   (   0.01,-128.24) (  -0.69,-131.36)  355.01                80
 08/10/2020   21:59:23   (   0.01,-128.23) (   0.33,-126.78)  165.57                80
 08/12/2020   10:20:54   (  -0.01,-128.26) (   0.83,-131.97)  422.45                80
 08/13/2020   09:59:17   (  -0.00,-128.25) (  -0.18,-127.39)   97.63                80