Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 4 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/07/2021   06:46:06   (  -0.02, -75.19) (   0.41, -77.17)  225.63                80
 04/08/2021   06:24:29   (  -0.02, -75.19) (  -0.61, -72.59)  297.44                80
 04/09/2021   18:46:05   (   0.02, -75.20) (  -0.56, -77.80)  295.40                80
 04/10/2021   18:29:48   (   0.02, -75.21) (   0.47, -73.21)  228.40                80
 04/12/2021   06:51:16   (  -0.02, -75.23) (   0.70, -78.39)  360.49                80
 04/13/2021   06:29:38   (  -0.02, -75.24) (  -0.32, -73.80)  163.34                80
 04/14/2021   18:51:15   (   0.02, -75.25) (  -0.84, -79.01)  428.89                80
 04/15/2021   18:34:57   (   0.02, -75.27) (   0.19, -74.43)   95.42                80
 04/17/2021   06:56:26   (  -0.02, -75.29) (   0.93, -79.62)  492.52                80
 04/18/2021   06:34:49   (  -0.02, -75.30) (  -0.09, -75.03)   31.74                80