Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2020 12 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/10/2020   18:24:11   (   0.00, -75.16) (   0.58, -72.53)  299.69                80
 12/12/2020   06:45:40   (  -0.01, -75.14) (   0.59, -77.71)  293.08                80
 12/13/2020   06:24:04   (  -0.01, -75.14) (  -0.46, -73.13)  228.85                80
 12/14/2020   18:45:41   (   0.01, -75.14) (  -0.69, -78.36)  365.67                80
 12/15/2020   18:29:24   (   0.02, -75.14) (   0.31, -73.76)  156.74                80
 12/17/2020   06:50:53   (  -0.02, -75.14) (   0.86, -78.95)  434.89                80
 12/18/2020   06:29:16   (  -0.02, -75.14) (  -0.19, -74.37)   87.83                80
 12/20/2020   18:34:36   (   0.02, -75.16) (   0.05, -75.00)   18.13                80
 12/23/2020   06:37:09   (  -0.02, -75.19) (   0.06, -75.61)   47.67                80