Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2020 12 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)
 12/08/2020   06:18:51   (   0.01, -75.16) (  -0.73, -71.89)  372.48                80
 12/09/2020   18:40:28   (  -0.01, -75.16) (  -0.43, -77.12)  222.22                80
 12/10/2020   18:24:11   (  -0.01, -75.16) (   0.56, -72.52)  300.03                80
 12/12/2020   06:45:40   (   0.01, -75.15) (   0.60, -77.71)  292.16                80
 12/13/2020   06:24:04   (   0.02, -75.15) (  -0.45, -73.13)  230.05                80
 12/14/2020   18:45:40   (  -0.02, -75.15) (  -0.76, -78.34)  364.29                80
 12/15/2020   18:29:23   (  -0.03, -75.15) (   0.29, -73.76)  158.36                80
 12/17/2020   06:50:53   (   0.03, -75.15) (   0.88, -78.95)  432.64                80
 12/18/2020   06:29:16   (   0.03, -75.15) (  -0.17, -74.37)   90.22                80
 12/20/2020   18:34:36   (  -0.03, -75.18) (   0.03, -75.00)   20.70                80