Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 4 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/14/2021   18:51:15   (   0.03, -75.22) (  -0.80, -79.02)  433.08                80
 04/15/2021   18:34:58   (   0.04, -75.22) (   0.22, -74.43)   90.56                80
 04/17/2021   06:56:26   (  -0.03, -75.24) (   0.95, -79.61)  497.79                80
 04/18/2021   06:34:48   (  -0.03, -75.25) (  -0.08, -75.02)   25.80                80
 04/20/2021   18:37:27   (   0.02, -75.26) (  -0.05, -75.65)   43.41                80
 04/21/2021   18:21:10   (   0.02, -75.27) (   0.98, -71.06)  480.88                80
 04/23/2021   06:42:38   (  -0.01, -75.30) (   0.19, -76.24)  106.38                80
 04/24/2021   06:21:01   (  -0.02, -75.32) (  -0.83, -71.65)  417.96                80
 04/25/2021   18:42:37   (   0.01, -75.33) (  -0.31, -76.86)  174.30                80
 04/26/2021   18:26:19   (   0.02, -75.35) (   0.72, -72.28)  350.51                80