Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 1 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/20/2021   18:44:12   (   0.02, -75.21) (  -0.59, -77.80)  295.98                80
 01/21/2021   18:27:55   (   0.01, -75.21) (   0.47, -73.22)  226.78                80
 01/23/2021   06:49:23   (   0.01, -75.21) (   0.76, -78.39)  363.06                80
 01/24/2021   06:27:46   (   0.01, -75.21) (  -0.31, -73.81)  159.47                80
 01/25/2021   18:49:23   (  -0.01, -75.21) (  -0.86, -79.03)  435.51                80
 01/26/2021   18:33:06   (  -0.00, -75.21) (   0.14, -74.44)   87.42                80
 01/29/2021   06:32:58   (   0.00, -75.22) (  -0.04, -75.04)   20.67                80
 01/31/2021   18:35:39   (  -0.00, -75.23) (  -0.07, -75.68)   50.23                80
 02/01/2021   18:19:21   (  -0.00, -75.24) (   0.93, -71.09)  473.61                80