Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2020 12 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/15/2020   18:29:23   (  -0.01, -75.15) (   0.29, -73.76)  158.84                80
 12/17/2020   06:50:53   (   0.00, -75.15) (   0.88, -78.94)  432.53                80
 12/18/2020   06:29:16   (   0.00, -75.16) (  -0.18, -74.36)   90.46                80
 12/20/2020   18:34:36   (   0.00, -75.19) (   0.03, -75.00)   21.56                80
 12/23/2020   06:37:09   (  -0.01, -75.22) (   0.08, -75.60)   43.84                80
 12/24/2020   06:15:32   (  -0.01, -75.24) (  -0.97, -71.03)  480.31                80
 12/25/2020   18:37:09   (   0.01, -75.27) (  -0.22, -76.24)  111.01                80
 12/26/2020   18:20:52   (   0.02, -75.29) (   0.84, -71.66)  413.52                80
 12/28/2020   06:42:21   (  -0.02, -75.31) (   0.33, -76.85)  174.94                80