Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 12 5.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/06/2021   06:46:33   (   0.00, -75.18) (   0.05, -75.50)   36.32                80
 12/07/2021   06:28:10   (   0.01, -75.18) (  -0.94, -71.05)  470.61                80
 12/08/2021   18:48:01   (  -0.00, -75.18) (  -0.27, -76.49)  148.00                80
 12/09/2021   18:32:19   (  -0.00, -75.19) (   0.72, -72.04)  359.47                80
 12/11/2021   06:54:40   (  -0.00, -75.20) (   0.47, -77.43)  254.18                80
 12/12/2021   06:33:38   (   0.00, -75.21) (  -0.52, -72.99)  253.80                80
 12/13/2021   18:56:09   (   0.00, -75.23) (  -0.69, -78.42)  363.16                80
 12/14/2021   18:40:27   (  -0.00, -75.24) (   0.30, -73.97)  145.32                80
 12/16/2021   07:02:48   (   0.00, -75.27) (   0.90, -79.37)  466.93                80
 12/17/2021   06:41:45   (   0.01, -75.28) (  -0.09, -74.92)   41.63                80