Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 12 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/24/2021   18:54:00   (   0.04, -75.18) (  -0.56, -77.82)  301.68                80
 12/25/2021   18:38:18   (   0.03, -75.18) (   0.44, -73.38)  205.49                80
 12/27/2021   07:00:39   (  -0.04, -75.18) (   0.76, -78.77)  409.06                80
 12/28/2021   06:39:36   (  -0.03, -75.18) (  -0.24, -74.33)   98.28                80
 12/30/2021   18:43:44   (   0.02, -75.20) (   0.02, -75.31)   12.22                80
 12/31/2021   18:28:02   (   0.02, -75.20) (   1.02, -70.86)  495.58                80
 01/02/2022   06:50:22   (  -0.01, -75.21) (   0.25, -76.24)  118.39                80
 01/03/2022   06:29:20   (  -0.00, -75.21) (  -0.75, -71.79)  389.32                80
 01/04/2022   18:51:50   (   0.00, -75.23) (  -0.45, -77.22)  227.95                80
 01/05/2022   18:36:07   (   0.00, -75.24) (   0.55, -72.78)  280.34                80