Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 5 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)
 05/16/2021   18:46:55   (   0.02, -75.26) (  -0.38, -77.11)  211.28                80
 05/17/2021   18:25:18   (   0.02, -75.27) (   0.66, -72.53)  313.26                80
 05/19/2021   06:49:25   (  -0.02, -75.28) (   0.52, -77.70)  274.90                80
 05/20/2021   06:27:48   (  -0.02, -75.30) (  -0.52, -73.11)  249.96                80
 05/21/2021   18:52:04   (   0.01, -75.34) (  -0.64, -78.32)  340.16                80
 05/22/2021   18:30:27   (   0.01, -75.35) (   0.40, -73.74)  185.07                80
 05/24/2021   06:54:34   (  -0.01, -75.38) (   0.77, -78.91)  402.09                80
 05/25/2021   06:32:56   (  -0.01, -75.40) (  -0.28, -74.33)  123.24                80
 05/26/2021   18:57:12   (   0.01, -75.44) (  -0.94, -79.52)  466.54                80
 05/27/2021   18:35:34   (   0.01, -75.46) (   0.11, -74.94)   58.97                80