Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 7 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/13/2021   18:43:53   (   0.08, -75.19) (  -0.22, -76.63)  162.73                80
 07/14/2021   18:27:35   (   0.08, -75.21) (   0.78, -72.03)  362.30                80
 07/16/2021   06:46:22   (  -0.09, -75.23) (   0.37, -77.20)  225.68                80
 07/17/2021   06:30:05   (  -0.08, -75.24) (  -0.68, -72.62)  299.40                80
 07/18/2021   18:49:01   (   0.09, -75.28) (  -0.48, -77.83)  291.16                80
 07/19/2021   18:32:44   (   0.09, -75.30) (   0.58, -73.25)  234.17                80
 07/21/2021   06:54:11   (  -0.11, -75.32) (   0.58, -78.42)  353.29                80
 07/22/2021   06:35:12   (  -0.11, -75.34) (  -0.41, -73.83)  171.99                80
 07/23/2021   18:54:09   (   0.12, -75.38) (  -0.73, -79.04)  418.32                80
 07/24/2021   18:37:51   (   0.12, -75.40) (   0.32, -74.46)  107.65                80