Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2020 12 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/18/2020   06:29:17   (  -0.01, -75.15) (  -0.20, -74.37)   89.83                80
 12/20/2020   18:34:36   (   0.00, -75.18) (   0.04, -75.00)   20.29                80
 12/23/2020   06:37:09   (   0.00, -75.20) (   0.07, -75.61)   45.47                80
 12/24/2020   06:15:32   (   0.00, -75.22) (  -0.92, -71.01)  478.50                80
 12/25/2020   18:37:09   (   0.00, -75.24) (  -0.22, -76.24)  113.30                80
 12/26/2020   18:20:53   (   0.00, -75.26) (   0.83, -71.66)  411.01                80
 12/28/2020   06:42:22   (  -0.00, -75.28) (   0.34, -76.84)  177.59                80
 12/29/2020   06:20:44   (  -0.00, -75.30) (  -0.66, -72.25)  346.70                80
 12/30/2020   18:42:22   (   0.00, -75.33) (  -0.48, -77.48)  244.89                80
 12/31/2020   18:26:05   (  -0.00, -75.35) (   0.57, -72.90)  279.81                80