Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 9 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/23/2021   06:37:00   (  -0.11, -75.19) (  -0.29, -74.43)   87.12                80
 09/25/2021   18:42:17   (   0.11, -75.20) (   0.13, -75.04)   17.29                80
 09/28/2021   06:44:46   (  -0.11, -75.20) (  -0.00, -75.63)   48.40                80
 09/29/2021   06:23:08   (  -0.11, -75.21) (  -1.08, -71.04)  475.07                80
 09/30/2021   18:47:24   (   0.11, -75.21) (  -0.10, -76.25)  117.65                80
 10/01/2021   18:25:45   (   0.12, -75.22) (   0.91, -71.65)  406.28                80
 10/03/2021   06:49:53   (  -0.11, -75.23) (   0.22, -76.83)  181.65                80
 10/04/2021   06:28:14   (  -0.12, -75.24) (  -0.79, -72.24)  342.52                80
 10/05/2021   18:52:29   (   0.11, -75.26) (  -0.39, -77.44)  249.23                80
 10/06/2021   18:30:52   (   0.12, -75.27) (   0.69, -72.86)  275.45                80