Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 8 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)
 08/01/2021   06:45:27   (  -0.11, -75.22) (   0.12, -76.22)  114.88                80
 08/02/2021   06:26:30   (  -0.10, -75.22) (  -0.93, -71.64)  409.05                80
 08/03/2021   18:45:25   (   0.12, -75.24) (  -0.26, -76.84)  182.79                80
 08/04/2021   18:29:07   (   0.11, -75.25) (   0.80, -72.26)  341.49                80
 08/06/2021   06:50:35   (  -0.13, -75.26) (   0.37, -77.43)  247.62                80
 08/07/2021   06:28:57   (  -0.13, -75.27) (  -0.68, -72.85)  276.71                80
 08/08/2021   18:50:33   (   0.14, -75.30) (  -0.50, -78.05)  314.62                80
 08/09/2021   18:34:15   (   0.13, -75.31) (   0.56, -73.47)  210.33                80
 08/11/2021   06:55:42   (  -0.14, -75.34) (   0.62, -78.64)  377.36                80
 08/12/2021   06:34:05   (  -0.14, -75.35) (  -0.44, -74.06)  147.76                80
 08/13/2021   18:55:40   (   0.15, -75.38) (  -0.73, -79.26)  442.73                80
 08/14/2021   18:39:23   (   0.14, -75.40) (   0.33, -74.68)   82.79                80