Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 3 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 03/19/2021   18:44:23   (   0.04, -75.20) (  -0.47, -77.52)  263.84                80
 03/20/2021   18:28:05   (   0.04, -75.20) (   0.55, -72.93)  259.03                80
 03/22/2021   06:49:33   (  -0.03, -75.21) (   0.60, -78.11)  330.35                80
 03/23/2021   06:27:56   (  -0.03, -75.21) (  -0.42, -73.52)  192.50                80
 03/24/2021   18:49:32   (   0.02, -75.20) (  -0.78, -78.73)  402.25                80
 03/25/2021   18:33:15   (   0.02, -75.21) (   0.24, -74.14)  121.19                80
 03/27/2021   06:54:43   (  -0.01, -75.23) (   0.92, -79.32)  466.96                80
 03/28/2021   06:33:06   (  -0.01, -75.24) (  -0.10, -74.73)   56.53                80
 03/30/2021   18:35:45   (   0.02, -75.25) (   0.01, -75.37)   13.91                80