Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 7 29.  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   22:05:10   (   0.01,-128.35) (  -0.08,-128.85)   56.90                80
 07/31/2020   21:48:53   (   0.01,-128.34) (   0.93,-124.27)  464.49                80
 08/02/2020   10:10:24   (  -0.01,-128.39) (   0.23,-129.47)  122.51                80
 08/03/2020   09:48:47   (  -0.01,-128.38) (  -0.79,-124.88)  398.53                80
 08/04/2020   22:10:24   (   0.01,-128.31) (  -0.42,-130.10)  204.75                80
 08/05/2020   21:54:09   (   0.00,-128.30) (   0.66,-125.53)  316.42                80
 08/07/2020   10:15:39   (  -0.00,-128.34) (   0.51,-130.72)  270.73                80
 08/08/2020   09:54:03   (  -0.00,-128.33) (  -0.51,-126.14)  250.17                80
 08/09/2020   22:15:40   (   0.00,-128.25) (  -0.69,-131.36)  353.67                80
 08/10/2020   21:59:24   (   0.00,-128.24) (   0.33,-126.77)  167.02                80