Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 1 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/24/2021   06:27:46   (   0.02, -75.20) (  -0.30, -73.81)  159.19                80
 01/25/2021   18:49:23   (  -0.01, -75.20) (  -0.87, -79.02)  436.11                80
 01/26/2021   18:33:07   (  -0.01, -75.20) (   0.19, -74.45)   86.64                80
 01/29/2021   06:32:58   (   0.01, -75.21) (  -0.03, -75.04)   19.56                80
 01/31/2021   18:35:38   (  -0.01, -75.22) (  -0.08, -75.68)   51.90                80
 02/01/2021   18:19:21   (  -0.01, -75.22) (   0.93, -71.09)  471.75                80
 02/03/2021   06:40:49   (   0.01, -75.24) (   0.23, -76.27)  116.55                80
 02/04/2021   06:19:12   (   0.00, -75.25) (  -0.78, -71.68)  407.01                80
 02/05/2021   18:40:49   (  -0.00, -75.26) (  -0.40, -76.89)  187.04                80
 02/06/2021   18:24:33   (  -0.00, -75.27) (   0.67, -72.32)  336.87                80