Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 5 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/01/2021   18:31:28   (   0.02, -75.19) (   0.43, -73.48)  195.71                80
 05/03/2021   06:52:56   (  -0.02, -75.20) (   0.79, -78.65)  393.67                80
 05/04/2021   06:31:18   (  -0.02, -75.21) (  -0.24, -74.06)  129.88                80
 05/05/2021   18:52:54   (   0.01, -75.22) (  -0.91, -79.27)  462.80                80
 05/06/2021   18:36:37   (   0.01, -75.23) (   0.12, -74.69)   61.53                80
 05/09/2021   06:39:08   (  -0.01, -75.27) (   0.00, -75.28)    1.74                80
 05/11/2021   18:39:07   (   0.01, -75.31) (  -0.12, -75.91)   68.16                80
 05/12/2021   18:22:49   (   0.01, -75.33) (   0.91, -71.32)  456.89                80
 05/14/2021   06:44:17   (  -0.01, -75.36) (   0.24, -76.50)  129.41                80