Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2020 12 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/30/2020   18:42:21   (   0.00, -75.22) (  -0.52, -77.46)  256.16                80
 12/31/2020   18:26:04   (   0.00, -75.22) (   0.54, -72.88)  266.78                80
 01/02/2021   06:47:34   (  -0.00, -75.23) (   0.61, -78.07)  323.63                80
 01/03/2021   06:25:56   (   0.00, -75.23) (  -0.39, -73.48)  199.43                80
 01/04/2021   18:47:33   (  -0.00, -75.24) (  -0.76, -78.70)  394.06                80
 01/05/2021   18:31:16   (  -0.00, -75.25) (   0.24, -74.11)  129.61                80
 01/07/2021   06:52:45   (   0.00, -75.27) (   0.91, -79.30)  459.34                80
 01/08/2021   06:31:09   (   0.00, -75.28) (  -0.15, -74.72)   64.30                80
 01/10/2021   18:33:49   (   0.00, -75.30) (   0.01, -75.35)    5.48                80