Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 9 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/08/2021   06:21:42   (  -0.14, -75.19) (  -1.10, -70.85)  494.95                80
 09/09/2021   18:43:17   (   0.14, -75.20) (  -0.06, -76.06)   97.66                80
 09/10/2021   18:26:59   (   0.14, -75.21) (   1.00, -71.47)  426.03                80
 09/12/2021   06:48:27   (  -0.14, -75.21) (   0.16, -76.65)  163.45                80
 09/13/2021   06:26:48   (  -0.15, -75.21) (  -0.84, -72.05)  360.10                80
 09/14/2021   18:48:23   (   0.15, -75.22) (  -0.32, -77.26)  232.51                80
 09/15/2021   18:32:06   (   0.15, -75.23) (   0.75, -72.68)  291.37                80
 09/17/2021   06:53:33   (  -0.16, -75.24) (   0.41, -77.85)  297.13                80
 09/18/2021   06:31:55   (  -0.16, -75.25) (  -0.60, -73.25)  227.17                80
 09/19/2021   18:56:10   (   0.16, -75.27) (  -0.56, -78.46)  363.98                80
 09/20/2021   18:35:06   (   0.16, -75.29) (   0.50, -73.88)  161.13                47