Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2020 4 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/06/2020   21:44:16   (   0.25,-127.67) (   1.06,-124.00)  417.47                50
 04/08/2020   10:07:56   (  -0.23,-127.58) (   0.14,-129.19)  183.44                80
 04/09/2020   09:46:20   (  -0.24,-127.54) (  -0.91,-124.62)  333.31                80
 04/10/2020   22:10:38   (   0.22,-127.49) (  -0.33,-129.83)  266.98                80
 04/11/2020   21:49:02   (   0.23,-127.45) (   0.73,-125.26)  249.96                80
 04/13/2020   10:13:13   (  -0.20,-127.37) (   0.48,-130.45)  351.15                80
 04/14/2020   09:51:36   (  -0.21,-127.32) (  -0.52,-125.86)  165.06                80
 04/15/2020   22:15:54   (   0.18,-127.26) (  -0.66,-131.09)  436.57                80
 04/16/2020   21:56:58   (   0.20,-127.21) (   0.34,-126.51)   80.08                80
 04/19/2020   09:58:30   (  -0.18,-127.08) (  -0.19,-127.12)    4.85                17