Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 2 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 02/13/2021   06:51:12   (  -0.00, -75.16) (   0.79, -78.72)  404.90                80
 02/14/2021   06:29:34   (  -0.00, -75.16) (  -0.22, -74.13)  117.80                80
 02/15/2021   18:51:12   (   0.00, -75.17) (  -0.91, -79.35)  475.98                80
 02/16/2021   18:34:55   (   0.01, -75.18) (   0.10, -74.76)   47.36                80
 02/19/2021   06:37:26   (  -0.00, -75.19) (   0.03, -75.36)   18.59                80
 02/21/2021   18:37:26   (  -0.01, -75.22) (  -0.20, -75.98)   88.02                80
 02/22/2021   18:21:09   (  -0.00, -75.23) (   0.87, -71.41)  435.79                80
 02/24/2021   06:42:36   (  -0.00, -75.24) (   0.33, -76.58)  153.09                80
 02/25/2021   06:21:00   (  -0.00, -75.25) (  -0.74, -72.00)  370.73                80