Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 8 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/04/2020   22:10:25   (   0.01,-128.30) (  -0.39,-130.10)  205.93                80
 08/05/2020   21:54:08   (   0.00,-128.29) (   0.62,-125.52)  314.99                80
 08/07/2020   10:15:39   (  -0.00,-128.32) (   0.54,-130.72)  273.00                80
 08/08/2020   09:54:02   (   0.00,-128.31) (  -0.48,-126.13)  247.63                80
 08/09/2020   22:15:40   (   0.00,-128.23) (  -0.73,-131.35)  356.42                80
 08/10/2020   21:59:24   (  -0.00,-128.21) (   0.35,-126.78)  164.02                80
 08/12/2020   10:18:14   (  -0.00,-128.24) (   0.82,-131.97)  424.84                80
 08/13/2020   10:01:58   (  -0.00,-128.22) (  -0.20,-127.39)   94.98                80
 08/15/2020   22:04:39   (   0.01,-128.11) (   0.02,-128.03)    8.90                80