Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 1 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/23/2021   06:49:24   (   0.02, -75.21) (   0.70, -78.40)  363.25                80
 01/24/2021   06:27:46   (   0.01, -75.20) (  -0.30, -73.81)  159.18                80
 01/25/2021   18:49:23   (  -0.01, -75.20) (  -0.87, -79.03)  436.08                80
 01/26/2021   18:33:07   (  -0.01, -75.20) (   0.19, -74.45)   86.72                80
 01/29/2021   06:32:58   (   0.01, -75.21) (  -0.03, -75.04)   19.76                80
 01/31/2021   18:35:39   (  -0.01, -75.22) (  -0.08, -75.68)   51.57                80
 02/01/2021   18:19:21   (  -0.00, -75.23) (   0.92, -71.09)  472.09                80
 02/03/2021   06:40:49   (   0.00, -75.25) (   0.24, -76.27)  116.17                80
 02/04/2021   06:19:13   (   0.00, -75.26) (  -0.83, -71.69)  407.45                80