Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 2 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 02/15/2021   18:51:12   (   0.00, -75.17) (  -0.93, -79.35)  476.55                80
 02/16/2021   18:34:55   (   0.01, -75.17) (   0.07, -74.76)   46.62                80
 02/19/2021   06:37:25   (   0.00, -75.18) (   0.05, -75.35)   19.73                80
 02/21/2021   18:37:26   (  -0.01, -75.20) (  -0.17, -75.99)   89.94                80
 02/22/2021   18:21:09   (  -0.00, -75.21) (   0.84, -71.40)  433.63                80
 02/24/2021   06:42:37   (  -0.00, -75.22) (   0.29, -76.59)  155.29                80
 02/25/2021   06:21:00   (  -0.00, -75.23) (  -0.72, -72.00)  368.28                80
 02/26/2021   18:42:37   (   0.01, -75.24) (  -0.46, -77.21)  224.96                80
 02/27/2021   18:26:20   (   0.01, -75.26) (   0.61, -72.64)  299.29                80