Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 9 2.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/02/2021   06:35:33   (  -0.14, -75.19) (  -0.33, -74.24)  108.08                80
 09/03/2021   18:57:08   (   0.14, -75.20) (  -0.83, -79.45)  484.82                80
 09/04/2021   18:40:51   (   0.14, -75.20) (   0.23, -74.87)   38.58                80
 09/07/2021   06:43:20   (  -0.15, -75.20) (  -0.06, -75.44)   28.08                80
 09/08/2021   06:21:42   (  -0.15, -75.21) (  -1.13, -70.86)  495.89                80
 09/09/2021   18:43:17   (   0.15, -75.23) (  -0.03, -76.07)   95.68                80
 09/10/2021   18:26:59   (   0.15, -75.23) (   0.98, -71.47)  428.49                80
 09/12/2021   06:48:26   (  -0.15, -75.24) (   0.19, -76.64)  160.62                80
 09/13/2021   06:26:49   (  -0.15, -75.25) (  -0.87, -72.06)  363.38                80
 09/14/2021   18:48:24   (   0.16, -75.27) (  -0.28, -77.27)  228.21                80
 09/15/2021   18:32:06   (   0.16, -75.28) (   0.73, -72.67)  296.13                80