Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 4 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/12/2021   06:51:16   (  -0.03, -75.21) (   0.65, -78.40)  362.98                80
 04/13/2021   06:29:39   (  -0.04, -75.21) (  -0.37, -73.81)  160.26                80
 04/14/2021   18:51:14   (   0.03, -75.22) (  -0.84, -79.01)  433.09                80
 04/15/2021   18:34:58   (   0.04, -75.22) (   0.24, -74.44)   90.64                80
 04/17/2021   06:56:26   (  -0.03, -75.24) (   0.93, -79.61)  497.94                80
 04/18/2021   06:34:49   (  -0.03, -75.25) (  -0.09, -75.02)   25.71                80
 04/20/2021   18:37:27   (   0.02, -75.27) (  -0.09, -75.64)   43.31                80
 04/21/2021   18:21:10   (   0.02, -75.28) (   1.00, -71.06)  481.06                80
 04/23/2021   06:42:38   (  -0.01, -75.30) (   0.18, -76.24)  106.39                80
 04/24/2021   06:21:01   (  -0.02, -75.32) (  -0.85, -71.65)  417.98                80