Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 10 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/13/2021   07:00:02   (  -0.05, -75.19) (   0.86, -79.18)  455.23                80
 10/14/2021   06:38:24   (  -0.06, -75.19) (  -0.22, -74.60)   68.10                80
 10/16/2021   18:43:41   (   0.06, -75.20) (   0.05, -75.21)    1.54                80
 10/19/2021   06:46:09   (  -0.05, -75.23) (   0.09, -75.78)   63.70                80
 10/20/2021   06:24:31   (  -0.06, -75.24) (  -0.98, -71.20)  460.96                80
 10/21/2021   18:48:47   (   0.05, -75.26) (  -0.21, -76.40)  130.29                80
 10/22/2021   18:27:08   (   0.05, -75.27) (   0.81, -71.81)  394.69                80
 10/24/2021   06:51:15   (  -0.04, -75.30) (   0.34, -76.98)  191.10                80
 10/25/2021   06:29:36   (  -0.04, -75.32) (  -0.68, -72.38)  333.88                80