Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 4 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/13/2021   06:29:38   (  -0.04, -75.21) (  -0.33, -73.80)  160.52                80
 04/14/2021   18:51:15   (   0.03, -75.22) (  -0.82, -79.01)  433.05                80
 04/15/2021   18:34:57   (   0.04, -75.22) (   0.20, -74.43)   90.62                80
 04/17/2021   06:56:26   (  -0.03, -75.24) (   0.97, -79.60)  497.73                80
 04/18/2021   06:34:48   (  -0.03, -75.25) (  -0.05, -75.02)   26.08                80
 04/20/2021   18:37:27   (   0.02, -75.26) (  -0.07, -75.64)   43.22                80
 04/21/2021   18:21:09   (   0.02, -75.28) (   0.96, -71.05)  481.04                80
 04/23/2021   06:42:38   (  -0.01, -75.31) (   0.22, -76.23)  106.25                80
 04/24/2021   06:21:01   (  -0.02, -75.32) (  -0.86, -71.66)  418.16                80
 04/25/2021   18:42:37   (   0.01, -75.33) (  -0.34, -76.86)  174.05                80
 04/26/2021   18:26:19   (   0.02, -75.35) (   0.69, -72.27)  350.76                80