Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 2 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 02/19/2021   06:37:26   (   0.00, -75.16) (   0.02, -75.36)   22.44                80
 02/21/2021   18:37:26   (   0.00, -75.18) (  -0.20, -75.98)   92.00                80
 02/22/2021   18:21:09   (   0.01, -75.19) (   0.87, -71.41)  431.98                80
 02/24/2021   06:42:38   (  -0.01, -75.21) (   0.27, -76.59)  156.23                80
 02/25/2021   06:21:00   (  -0.01, -75.23) (  -0.73, -72.00)  367.76                80
 02/26/2021   18:42:37   (   0.02, -75.25) (  -0.45, -77.21)  225.01                80
 02/27/2021   18:26:21   (   0.02, -75.26) (   0.62, -72.64)  299.65                80
 03/01/2021   06:47:49   (  -0.02, -75.30) (   0.52, -77.82)  287.07                80
 03/02/2021   06:26:12   (  -0.02, -75.32) (  -0.48, -73.23)  237.68                80
 03/03/2021   18:47:49   (   0.02, -75.34) (  -0.69, -78.45)  354.41                80