Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 1 7.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/07/2021   06:52:45   (   0.01, -75.18) (   0.91, -79.30)  468.44                80
 01/08/2021   06:31:08   (   0.00, -75.18) (  -0.09, -74.71)   54.03                80
 01/10/2021   18:33:49   (   0.00, -75.19) (  -0.01, -75.35)   17.56                80
 01/13/2021   06:39:01   (  -0.00, -75.20) (   0.15, -75.95)   85.05                80
 01/14/2021   06:17:23   (  -0.00, -75.20) (  -0.85, -71.36)  438.18                80
 01/15/2021   18:39:00   (   0.00, -75.22) (  -0.31, -76.57)  154.54                80
 01/16/2021   18:22:44   (   0.00, -75.23) (   0.75, -72.00)  369.51                80
 01/18/2021   06:44:12   (   0.00, -75.25) (   0.44, -77.17)  218.99                80
 01/19/2021   06:22:36   (   0.00, -75.27) (  -0.62, -72.60)  305.31                80
 01/20/2021   18:44:13   (  -0.00, -75.30) (  -0.54, -77.82)  286.42                80