Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 5 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)
 05/19/2021   06:49:25   (  -0.01, -75.19) (   0.56, -77.69)  285.20                80
 05/20/2021   06:27:47   (  -0.02, -75.19) (  -0.47, -73.10)  237.23                80
 05/21/2021   18:49:24   (   0.02, -75.18) (  -0.70, -78.32)  357.54                80
 05/22/2021   18:33:06   (   0.02, -75.18) (   0.34, -73.73)  165.23                80
 05/24/2021   06:54:34   (  -0.02, -75.18) (   0.85, -78.90)  424.90                80
 05/25/2021   06:32:56   (  -0.02, -75.18) (  -0.19, -74.31)   97.99                80
 05/26/2021   18:54:33   (   0.03, -75.17) (  -0.92, -79.54)  496.54                80
 05/27/2021   18:38:16   (   0.03, -75.18) (   0.11, -74.95)   26.63                80
 05/30/2021   06:38:06   (  -0.04, -75.18) (   0.03, -75.53)   39.90                80
 05/31/2021   06:21:48   (  -0.04, -75.19) (  -1.01, -70.95)  483.71                80