Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 7 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/01/2020   10:16:38   (   0.04,-128.16) (   0.71,-131.05)  329.82                80
 07/02/2020   09:55:03   (   0.03,-128.19) (  -0.36,-126.48)  194.32                80
 07/03/2020   22:19:21   (  -0.03,-128.16) (  -0.85,-131.70)  404.23                80
 07/04/2020   22:00:25   (  -0.02,-128.18) (   0.22,-127.13)  119.97                80
 07/06/2020   10:21:56   (   0.02,-128.27) (   0.91,-132.33)  461.72                80
 07/07/2020   10:00:19   (   0.02,-128.29) (  -0.10,-127.75)   62.13                80
 07/09/2020   22:03:02   (  -0.02,-128.28) (  -0.02,-128.40)   13.18                80
 07/12/2020   10:08:16   (   0.02,-128.39) (   0.15,-129.01)   70.71                80
 07/13/2020   09:46:39   (   0.02,-128.41) (  -0.86,-124.43)  452.87                80
 07/14/2020   22:08:18   (  -0.02,-128.37) (  -0.32,-129.65)  147.16                80