Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 3 18.  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   18:44:22   (   0.04, -75.20) (  -0.50, -77.51)  263.89                80
 03/20/2021   18:28:06   (   0.04, -75.20) (   0.58, -72.94)  258.97                80
 03/22/2021   06:49:33   (  -0.03, -75.21) (   0.63, -78.11)  330.54                80
 03/23/2021   06:27:56   (  -0.03, -75.21) (  -0.38, -73.52)  192.31                80
 03/24/2021   18:49:33   (   0.02, -75.20) (  -0.75, -78.74)  402.44                80
 03/25/2021   18:33:15   (   0.02, -75.21) (   0.27, -74.15)  120.97                80
 03/27/2021   06:54:44   (  -0.01, -75.23) (   0.90, -79.33)  467.31                80
 03/28/2021   06:33:06   (  -0.01, -75.23) (  -0.12, -74.74)   56.10                80
 03/30/2021   18:35:45   (   0.02, -75.24) (  -0.04, -75.36)   14.43                80