Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 9 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)
 09/09/2021   18:43:17   (   0.14, -75.20) (  -0.07, -76.05)   97.53                80
 09/10/2021   18:26:59   (   0.14, -75.21) (   0.99, -71.47)  426.23                80
 09/12/2021   06:48:27   (  -0.14, -75.21) (   0.17, -76.64)  163.06                80
 09/13/2021   06:26:48   (  -0.15, -75.22) (  -0.84, -72.05)  360.54                80
 09/14/2021   18:48:23   (   0.15, -75.22) (  -0.33, -77.26)  232.10                80
 09/15/2021   18:32:06   (   0.15, -75.23) (   0.74, -72.67)  291.83                80
 09/17/2021   06:53:33   (  -0.16, -75.24) (   0.42, -77.85)  296.46                80
 09/18/2021   06:31:55   (  -0.16, -75.25) (  -0.59, -73.25)  227.90                80
 09/19/2021   18:56:10   (   0.16, -75.27) (  -0.57, -78.46)  363.30                80
 09/20/2021   18:36:03   (   0.16, -75.29) (   0.49, -73.88)  161.85                10
 09/22/2021   06:58:40   (  -0.16, -75.32) (   0.66, -79.05)  424.29                80