Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 9 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/22/2021   06:58:38   (  -0.11, -75.20) (   0.76, -79.02)  436.08                80
 09/23/2021   06:37:01   (  -0.12, -75.20) (  -0.31, -74.44)   87.15                80
 09/25/2021   18:42:17   (   0.12, -75.20) (   0.15, -75.05)   17.13                80
 09/28/2021   06:44:46   (  -0.12, -75.21) (  -0.02, -75.63)   47.88                80
 09/29/2021   06:23:09   (  -0.12, -75.21) (  -1.09, -71.05)  475.68                80
 09/30/2021   18:47:24   (   0.12, -75.22) (  -0.09, -76.25)  117.26                80
 10/01/2021   18:25:46   (   0.13, -75.23) (   0.92, -71.66)  406.75                80
 10/03/2021   06:49:53   (  -0.12, -75.25) (   0.21, -76.84)  180.66                80
 10/04/2021   06:28:14   (  -0.13, -75.25) (  -0.80, -72.24)  343.60                80