Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 6 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)
 06/06/2021   18:45:52   (   0.02, -75.23) (  -0.44, -77.36)  241.73                80
 06/07/2021   18:29:35   (   0.02, -75.24) (   0.60, -72.77)  281.60                80
 06/09/2021   06:48:21   (  -0.03, -75.23) (   0.61, -77.93)  308.50                80
 06/10/2021   06:32:04   (  -0.02, -75.24) (  -0.44, -73.35)  214.96                80
 06/11/2021   18:51:00   (   0.03, -75.25) (  -0.74, -78.56)  378.19                80
 06/12/2021   18:34:42   (   0.03, -75.25) (   0.30, -73.97)  145.56                80
 06/14/2021   06:53:30   (  -0.03, -75.26) (   0.84, -79.15)  443.70                80
 06/15/2021   06:37:12   (  -0.03, -75.26) (  -0.20, -74.56)   80.34                80
 06/17/2021   18:39:51   (   0.03, -75.29) (   0.07, -75.19)   12.64                80