Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 5 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)
 05/24/2021   10:17:39   (   0.07,-128.38) (   0.36,-129.75)  155.56                80
 05/25/2021   09:56:02   (   0.07,-128.39) (  -0.68,-125.16)  369.01                80
 05/26/2021   22:17:38   (  -0.07,-128.34) (  -0.50,-130.37)  230.49                80
 05/27/2021   22:01:20   (  -0.07,-128.36) (   0.49,-125.77)  294.22                80
 05/29/2021   10:22:48   (   0.07,-128.45) (   0.63,-130.96)  285.44                80
 05/30/2021   10:01:10   (   0.07,-128.46) (  -0.42,-126.37)  238.59                80
 05/31/2021   22:22:47   (  -0.07,-128.40) (  -0.76,-131.58)  362.37                80
 06/01/2021   22:06:28   (  -0.07,-128.41) (   0.23,-126.98)  162.21                80
 06/03/2021   10:27:57   (   0.07,-128.51) (   0.88,-132.17)  416.71                80
 06/04/2021   10:06:19   (   0.07,-128.52) (  -0.17,-127.58)  107.38                80
 06/05/2021   22:27:54   (  -0.07,-128.45) (  -1.07,-132.78)  494.67                80