Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 6 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/09/2021   06:48:22   (  -0.03, -75.23) (   0.58, -77.94)  308.77                80
 06/10/2021   06:32:04   (  -0.02, -75.23) (  -0.46, -73.35)  214.62                80
 06/11/2021   18:51:00   (   0.03, -75.24) (  -0.72, -78.56)  378.49                80
 06/12/2021   18:34:43   (   0.03, -75.25) (   0.32, -73.98)  145.18                80
 06/14/2021   06:53:30   (  -0.03, -75.25) (   0.83, -79.15)  444.32                80
 06/15/2021   06:37:12   (  -0.03, -75.26) (  -0.16, -74.55)   79.69                80
 06/17/2021   18:39:52   (   0.03, -75.29) (   0.08, -75.19)   12.08                80
 06/20/2021   06:39:40   (  -0.03, -75.31) (   0.08, -75.77)   52.11                80
 06/21/2021   06:23:23   (  -0.03, -75.33) (  -0.96, -71.18)  472.47                80