Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 6 7.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/07/2021   18:29:34   (   0.02, -75.23) (   0.56, -72.76)  281.42                80
 06/09/2021   06:48:21   (  -0.03, -75.23) (   0.59, -77.94)  308.95                80
 06/10/2021   06:32:04   (  -0.02, -75.23) (  -0.45, -73.35)  214.40                80
 06/11/2021   18:51:00   (   0.03, -75.24) (  -0.73, -78.56)  378.74                80
 06/12/2021   18:34:43   (   0.03, -75.25) (   0.31, -73.97)  144.89                80
 06/14/2021   06:53:30   (  -0.03, -75.25) (   0.84, -79.15)  444.67                80
 06/15/2021   06:37:13   (  -0.03, -75.26) (  -0.21, -74.57)   79.30                80
 06/17/2021   18:39:51   (   0.03, -75.28) (   0.07, -75.19)   11.58                80
 06/20/2021   06:39:40   (  -0.03, -75.31) (   0.08, -75.77)   52.67                80