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

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/02/2021   06:47:33   (   0.02, -75.20) (   0.68, -78.06)  326.41                80
 01/03/2021   06:25:56   (   0.01, -75.19) (  -0.37, -73.48)  195.33                80
 01/04/2021   18:47:33   (  -0.00, -75.18) (  -0.77, -78.70)  400.24                80
 01/05/2021   18:31:16   (   0.00, -75.18) (   0.22, -74.11)  121.96                80
 01/07/2021   06:52:45   (  -0.00, -75.18) (   0.93, -79.30)  469.02                80
 01/08/2021   06:31:08   (   0.01, -75.18) (  -0.07, -74.70)   53.75                80
 01/10/2021   18:33:49   (  -0.01, -75.18) (  -0.02, -75.35)   18.83                80
 01/13/2021   06:39:00   (   0.01, -75.19) (   0.17, -75.95)   85.76                80
 01/14/2021   06:17:23   (   0.01, -75.19) (  -0.83, -71.35)  437.32                80