Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 5 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/09/2021   06:39:07   (  -0.02, -75.17) (   0.02, -75.27)   11.69                80
 05/11/2021   18:41:46   (   0.02, -75.20) (  -0.14, -75.90)   79.18                80
 05/12/2021   18:20:09   (   0.02, -75.21) (   0.89, -71.31)  444.82                80
 05/14/2021   06:44:17   (  -0.01, -75.22) (   0.25, -76.49)  144.48                80
 05/15/2021   06:22:39   (  -0.02, -75.23) (  -0.79, -71.91)  379.69                80
 05/16/2021   18:46:55   (   0.01, -75.26) (  -0.43, -77.11)  211.31                80
 05/17/2021   18:25:17   (   0.01, -75.27) (   0.61, -72.52)  313.20                80
 05/19/2021   06:49:25   (  -0.01, -75.29) (   0.53, -77.70)  275.24                80
 05/20/2021   06:27:48   (  -0.01, -75.30) (  -0.51, -73.12)  249.53                80
 05/21/2021   18:52:04   (   0.00, -75.34) (  -0.65, -78.33)  340.59                80
 05/22/2021   18:30:27   (   0.00, -75.36) (   0.39, -73.74)  184.60                80