Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 1 3.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/03/2021   06:25:56   (   0.01, -75.19) (  -0.38, -73.48)  195.08                80
 01/04/2021   18:47:33   (   0.01, -75.19) (  -0.77, -78.70)  400.15                80
 01/05/2021   18:31:17   (   0.02, -75.19) (   0.29, -74.12)  122.25                80
 01/07/2021   06:52:45   (  -0.02, -75.18) (   0.92, -79.30)  468.99                80
 01/08/2021   06:31:09   (  -0.02, -75.18) (  -0.14, -74.72)   53.54                80
 01/10/2021   18:33:48   (  -0.02, -75.19) (  -0.07, -75.33)   17.41                80
 01/13/2021   06:39:00   (   0.02, -75.20) (   0.15, -75.95)   84.61                80
 01/14/2021   06:17:23   (   0.01, -75.20) (  -0.85, -71.36)  438.61                80
 01/15/2021   18:39:00   (  -0.01, -75.22) (  -0.31, -76.58)  154.68                80
 01/16/2021   18:22:43   (  -0.01, -75.23) (   0.69, -71.99)  369.23                80