Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 1 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/07/2021   06:52:46   (  -0.02, -75.18) (   0.89, -79.30)  469.20                80
 01/08/2021   06:31:08   (   0.01, -75.18) (  -0.11, -74.71)   54.12                80
 01/10/2021   18:33:48   (  -0.01, -75.19) (  -0.05, -75.34)   16.57                80
 01/13/2021   06:39:00   (   0.01, -75.20) (   0.19, -75.94)   84.29                80
 01/14/2021   06:17:23   (   0.01, -75.21) (  -0.87, -71.36)  439.02                80
 01/15/2021   18:39:00   (  -0.01, -75.23) (  -0.34, -76.57)  153.43                80
 01/16/2021   18:22:43   (  -0.01, -75.24) (   0.72, -71.99)  370.63                80
 01/18/2021   06:44:12   (   0.01, -75.26) (   0.41, -77.18)  218.08                80
 01/19/2021   06:22:35   (   0.00, -75.28) (  -0.59, -72.59)  306.24                80