Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 2 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)
 02/08/2021   06:46:00   (   0.01, -75.18) (   0.52, -77.49)  263.17                80
 02/09/2021   06:24:23   (   0.01, -75.17) (  -0.48, -72.90)  258.82                80
 02/10/2021   18:46:01   (  -0.00, -75.18) (  -0.64, -78.12)  335.64                80
 02/11/2021   18:29:44   (  -0.00, -75.18) (   0.36, -73.53)  187.16                80
 02/13/2021   06:51:12   (   0.00, -75.18) (   0.78, -78.72)  403.36                80
 02/14/2021   06:29:34   (   0.00, -75.18) (  -0.23, -74.13)  119.84                80
 02/15/2021   18:51:12   (   0.00, -75.20) (  -0.95, -79.34)  473.17                80
 02/16/2021   18:34:55   (   0.00, -75.21) (   0.12, -74.77)   50.66                80
 02/19/2021   06:37:26   (  -0.00, -75.23) (   0.01, -75.36)   14.61                80
 02/21/2021   18:37:26   (   0.01, -75.26) (  -0.18, -75.99)   83.19                80