Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 2 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 02/23/2020   22:00:53   (   0.36,-128.45) (   0.53,-127.62)   94.83                80
 02/25/2020   10:22:23   (  -0.36,-128.44) (   0.64,-132.81)  499.28                80
 02/26/2020   10:00:48   (  -0.36,-128.44) (  -0.40,-128.24)   22.76                80
 02/28/2020   22:03:31   (   0.36,-128.47) (   0.26,-128.90)   49.08                80
 02/29/2020   21:47:16   (   0.36,-128.47) (   1.30,-124.32)  472.63                80
 03/02/2020   10:08:46   (  -0.36,-128.44) (  -0.13,-129.52)  122.53                80
 03/03/2020   09:47:10   (  -0.35,-128.43) (  -1.11,-124.93)  398.54                80
 03/04/2020   22:08:49   (   0.35,-128.44) (  -0.06,-130.16)  196.72                80
 03/05/2020   21:52:34   (   0.34,-128.43) (   0.98,-125.59)  324.08                80
 03/07/2020   10:14:04   (  -0.34,-128.40) (   0.20,-130.78)  272.08                80