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)
 12/09/2020   18:40:28   (   0.00, -75.16) (  -0.42, -77.12)  222.23                80
 12/10/2020   18:24:11   (   0.00, -75.16) (   0.57, -72.52)  300.09                80
 12/12/2020   06:45:40   (  -0.00, -75.15) (   0.60, -77.71)  292.20                80
 12/13/2020   06:24:04   (  -0.00, -75.15) (  -0.45, -73.13)  230.04                80
 12/14/2020   18:45:41   (   0.00, -75.16) (  -0.69, -78.35)  364.06                80
 12/15/2020   18:29:24   (  -0.00, -75.16) (   0.30, -73.76)  158.70                80
 12/17/2020   06:50:53   (   0.01, -75.16) (   0.87, -78.95)  432.34                80
 12/18/2020   06:29:16   (   0.01, -75.16) (  -0.19, -74.37)   90.72                80
 12/20/2020   18:34:36   (  -0.01, -75.19) (   0.04, -75.00)   21.66                80