Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 7 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)
 07/21/2021   06:54:10   (  -0.09, -75.20) (   0.63, -78.41)  365.63                80
 07/22/2021   06:35:12   (  -0.09, -75.20) (  -0.42, -73.82)  157.68                80
 07/23/2021   18:54:09   (   0.10, -75.20) (  -0.74, -79.03)  436.16                80
 07/24/2021   18:37:50   (   0.10, -75.21) (   0.26, -74.44)   87.88                80
 07/27/2021   06:40:20   (  -0.11, -75.24) (  -0.15, -75.03)   24.32                80
 07/29/2021   18:40:18   (   0.11, -75.27) (   0.01, -75.64)   42.77                80
 07/30/2021   18:24:00   (   0.11, -75.29) (   1.07, -71.06)  482.58                80
 08/01/2021   06:42:48   (  -0.12, -75.33) (   0.10, -76.23)  103.85                80
 08/02/2021   06:26:30   (  -0.12, -75.35) (  -0.95, -71.65)  421.44                80
 08/03/2021   18:45:26   (   0.13, -75.37) (  -0.18, -76.87)  169.94                80