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   18:54:30   (   0.01, -75.17) (   0.00, -79.48)  479.20                 0
 05/06/2021   18:36:36   (   0.01, -75.17) (   0.09, -74.68)   55.22                80
 05/09/2021   06:39:07   (  -0.01, -75.17) (   0.02, -75.27)   11.56                80
 05/11/2021   18:39:06   (   0.01, -75.18) (  -0.14, -75.90)   81.47                80
 05/12/2021   18:22:48   (   0.01, -75.19) (   0.90, -71.31)  442.21                80
 05/14/2021   06:44:16   (  -0.01, -75.20) (   0.30, -76.48)  146.57                80
 05/15/2021   06:22:38   (  -0.01, -75.21) (  -0.73, -71.89)  377.12                80
 05/16/2021   18:44:15   (   0.00, -75.21) (  -0.42, -77.11)  215.87                80
 05/17/2021   18:27:57   (   0.00, -75.22) (   0.62, -72.52)  308.26                80
 05/19/2021   06:49:24   (   0.00, -75.25) (   0.57, -77.69)  279.43                80