Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 7 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)
 07/23/2021   18:54:08   (   0.10, -75.20) (  -0.78, -79.02)  436.13                80
 07/24/2021   18:37:50   (   0.10, -75.21) (   0.27, -74.44)   87.85                80
 07/27/2021   06:40:20   (  -0.11, -75.24) (  -0.17, -75.03)   24.07                80
 07/29/2021   18:40:18   (   0.11, -75.27) (   0.03, -75.65)   43.00                80
 07/30/2021   18:24:00   (   0.11, -75.29) (   1.09, -71.06)  482.25                80
 08/01/2021   06:45:28   (  -0.12, -75.32) (   0.08, -76.24)  104.37                80
 08/02/2021   06:24:24   (  -0.12, -75.34) (  -0.97, -71.65)  420.85                46
 08/03/2021   18:45:26   (   0.13, -75.36) (  -0.21, -76.86)  170.45                80
 08/04/2021   18:29:08   (   0.13, -75.38) (   0.85, -72.27)  355.15                80