Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 8 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/30/2021   18:35:44   (   0.13, -75.22) (   0.51, -73.67)  176.94                80
 09/01/2021   06:57:12   (  -0.14, -75.22) (   0.67, -78.84)  413.02                80
 09/02/2021   06:35:33   (  -0.14, -75.22) (  -0.34, -74.25)  110.68                80
 09/03/2021   18:57:08   (   0.15, -75.24) (  -0.82, -79.45)  481.31                80
 09/04/2021   18:40:51   (   0.15, -75.24) (   0.24, -74.87)   42.86                80
 09/07/2021   06:43:21   (  -0.15, -75.27) (  -0.13, -75.46)   21.43                80
 09/09/2021   18:43:18   (   0.15, -75.30) (  -0.02, -76.07)   87.45                80
 09/10/2021   18:27:00   (   0.15, -75.32) (   1.04, -71.49)  437.50                80
 09/12/2021   06:48:28   (  -0.16, -75.34) (   0.13, -76.66)  150.10                80