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

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/05/2021   18:52:54   (   0.01, -75.17) (  -0.92, -79.27)  467.84                80
 05/06/2021   18:36:37   (   0.01, -75.17) (   0.12, -74.68)   55.10                80
 05/09/2021   06:39:07   (  -0.01, -75.17) (   0.00, -75.28)   11.48                80
 05/11/2021   18:39:05   (   0.01, -75.18) (  -0.17, -75.89)   81.43                80
 05/12/2021   18:22:48   (   0.01, -75.19) (   0.86, -71.30)  442.30                80
 05/14/2021   06:44:16   (  -0.01, -75.20) (   0.28, -76.49)  146.36                80
 05/15/2021   06:22:39   (  -0.01, -75.21) (  -0.76, -71.90)  377.32                80
 05/16/2021   18:44:14   (   0.00, -75.22) (  -0.45, -77.10)  215.73                80
 05/17/2021   18:27:57   (   0.00, -75.23) (   0.59, -72.51)  308.46                80