Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2020 12 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/13/2020   06:24:04   (   0.00, -75.14) (  -0.45, -73.13)  229.65                80
 12/14/2020   18:45:41   (  -0.00, -75.16) (  -0.70, -78.35)  363.67                80
 12/15/2020   18:29:23   (   0.00, -75.16) (   0.29, -73.76)  159.37                80
 12/17/2020   06:50:54   (  -0.01, -75.17) (   0.81, -78.96)  431.54                80
 12/18/2020   06:29:16   (  -0.01, -75.18) (  -0.18, -74.37)   91.82                80
 12/20/2020   18:34:36   (   0.02, -75.21) (   0.04, -75.00)   24.05                80
 12/23/2020   06:37:09   (  -0.02, -75.25) (   0.07, -75.61)   40.58                80
 12/24/2020   06:15:32   (  -0.02, -75.27) (  -0.98, -71.03)  484.00                80
 12/25/2020   18:37:09   (   0.03, -75.31) (  -0.21, -76.24)  106.71                80
 12/26/2020   18:20:52   (   0.03, -75.33) (   0.85, -71.66)  418.25                80