Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 9 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)
 09/22/2021   06:58:38   (  -0.10, -75.20) (   0.77, -79.02)  435.95                80
 09/23/2021   06:37:00   (  -0.11, -75.20) (  -0.30, -74.44)   87.24                80
 09/25/2021   18:42:17   (   0.11, -75.20) (   0.14, -75.05)   17.37                80
 09/28/2021   06:44:46   (  -0.11, -75.21) (  -0.01, -75.63)   48.05                80
 09/29/2021   06:23:09   (  -0.11, -75.21) (  -1.08, -71.05)  475.46                80
 09/30/2021   18:47:24   (   0.11, -75.22) (  -0.10, -76.25)  117.29                80
 10/01/2021   18:25:45   (   0.12, -75.22) (   0.91, -71.65)  406.68                80
 10/03/2021   06:49:53   (  -0.11, -75.24) (   0.22, -76.83)  181.07                80
 10/04/2021   06:28:14   (  -0.12, -75.25) (  -0.79, -72.24)  343.14                80
 10/05/2021   18:52:30   (   0.11, -75.26) (  -0.39, -77.44)  248.64                80