Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 5 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/04/2021   06:31:18   (  -0.02, -75.17) (  -0.26, -74.06)  126.58                80
 05/05/2021   18:52:55   (   0.01, -75.17) (  -0.89, -79.28)  467.83                80
 05/06/2021   18:36:37   (   0.01, -75.17) (   0.14, -74.69)   55.24                80
 05/09/2021   06:39:07   (  -0.01, -75.18) (   0.03, -75.27)   11.51                80
 05/11/2021   18:39:06   (   0.01, -75.19) (  -0.15, -75.90)   81.14                80
 05/12/2021   18:22:48   (   0.01, -75.19) (   0.89, -71.31)  442.58                80
 05/14/2021   06:44:17   (  -0.01, -75.21) (   0.26, -76.49)  146.05                80
 05/15/2021   06:22:39   (  -0.01, -75.21) (  -0.77, -71.91)  377.68                80
 05/16/2021   18:44:15   (   0.00, -75.22) (  -0.43, -77.11)  215.30                80
 05/17/2021   18:27:57   (   0.00, -75.23) (   0.60, -72.52)  308.89                80