Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 1 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/04/2021   18:47:33   (   0.01, -75.19) (  -0.80, -78.69)  399.80                80
 01/05/2021   18:31:16   (   0.01, -75.19) (   0.25, -74.11)  122.64                80
 01/07/2021   06:52:46   (  -0.01, -75.19) (   0.89, -79.30)  468.63                80
 01/08/2021   06:31:08   (  -0.01, -75.19) (  -0.11, -74.71)   54.04                80
 01/10/2021   18:33:48   (  -0.02, -75.19) (  -0.04, -75.34)   16.46                80
 01/13/2021   06:39:00   (   0.02, -75.20) (   0.18, -75.94)   83.74                80
 01/14/2021   06:17:23   (   0.01, -75.21) (  -0.88, -71.36)  439.47                80
 01/15/2021   18:39:00   (  -0.01, -75.23) (  -0.33, -76.57)  153.48                80
 01/16/2021   18:22:43   (  -0.00, -75.24) (   0.73, -71.99)  370.51                80