Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 9 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)
 09/04/2021   18:40:51   (   0.14, -75.20) (   0.22, -74.86)   38.91                80
 09/07/2021   06:43:20   (  -0.14, -75.20) (  -0.11, -75.45)   27.72                80
 09/08/2021   06:21:42   (  -0.14, -75.21) (  -1.12, -70.86)  496.20                80
 09/09/2021   18:43:17   (   0.14, -75.23) (  -0.04, -76.06)   95.33                80
 09/10/2021   18:26:59   (   0.14, -75.23) (   0.97, -71.47)  428.83                80
 09/12/2021   06:48:26   (  -0.14, -75.24) (   0.20, -76.64)  160.32                80
 09/13/2021   06:26:49   (  -0.15, -75.25) (  -0.87, -72.06)  363.68                80
 09/14/2021   18:48:24   (   0.15, -75.26) (  -0.29, -77.27)  227.89                80
 09/15/2021   18:32:05   (   0.16, -75.27) (   0.72, -72.67)  296.46                80
 09/17/2021   06:53:33   (  -0.16, -75.29) (   0.44, -77.84)  291.65                80