Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 8 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/22/2021   06:46:58   (  -0.13, -75.20) (   0.14, -76.44)  141.12                80
 08/23/2021   06:25:20   (  -0.13, -75.21) (  -0.92, -71.86)  382.37                80
 08/24/2021   18:46:55   (   0.14, -75.21) (  -0.31, -77.05)  210.69                80
 08/25/2021   18:30:37   (   0.14, -75.22) (   0.75, -72.47)  313.54                80
 08/27/2021   06:52:05   (  -0.14, -75.24) (   0.43, -77.64)  274.42                80
 08/28/2021   06:30:27   (  -0.14, -75.25) (  -0.63, -73.06)  249.89                80
 08/29/2021   18:52:02   (   0.15, -75.26) (  -0.53, -78.26)  342.48                80
 08/30/2021   18:35:45   (   0.15, -75.27) (   0.53, -73.68)  182.15                80
 09/01/2021   06:57:12   (  -0.15, -75.30) (   0.65, -78.85)  404.98                80
 09/02/2021   06:35:35   (  -0.16, -75.31) (  -0.41, -74.27)  119.62                80
 09/03/2021   18:57:10   (   0.16, -75.33) (  -0.74, -79.48)  472.43                80
 09/04/2021   18:40:52   (   0.17, -75.34) (   0.26, -74.88)   52.66                80