Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 6 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/01/2021   18:40:43   (   0.01, -75.23) (  -0.21, -76.14)  104.90                80
 06/02/2021   18:24:26   (   0.01, -75.24) (   0.83, -71.56)  419.54                80
 06/04/2021   06:45:53   (  -0.01, -75.25) (   0.33, -76.73)  169.03                80
 06/05/2021   06:24:16   (  -0.01, -75.26) (  -0.72, -72.15)  355.71                80
 06/06/2021   18:45:52   (   0.02, -75.30) (  -0.47, -77.35)  235.01                80
 06/07/2021   18:29:34   (   0.02, -75.32) (   0.58, -72.77)  290.10                80
 06/09/2021   06:51:02   (  -0.03, -75.34) (   0.58, -77.94)  297.48                80
 06/10/2021   06:29:24   (  -0.02, -75.36) (  -0.47, -73.36)  227.69                80
 06/11/2021   18:51:01   (   0.03, -75.39) (  -0.71, -78.57)  362.70                80
 06/12/2021   18:34:43   (   0.03, -75.41) (   0.33, -73.98)  162.83                80
 06/14/2021   06:53:30   (  -0.03, -75.44) (   0.82, -79.16)  423.87                80