Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 2 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 02/24/2021   10:03:05   (  -0.17,-128.11) (  -0.33,-127.46)   74.60                80
 02/26/2021   22:07:57   (   0.16,-128.20) (   0.21,-128.10)   12.34                51
 03/01/2021   10:10:56   (  -0.16,-128.22) (  -0.03,-128.68)   53.12                80
 03/02/2021   09:49:19   (  -0.16,-128.24) (  -1.10,-124.11)  471.05                80
 03/03/2021   22:10:57   (   0.15,-128.29) (  -0.07,-129.32)  118.08                80
 03/04/2021   21:54:39   (   0.16,-128.30) (   0.95,-124.73)  406.27                80
 03/06/2021   10:16:08   (  -0.14,-128.30) (   0.19,-129.92)  184.14                80
 03/07/2021   09:54:30   (  -0.15,-128.30) (  -0.82,-125.33)  339.25                80
 03/08/2021   22:16:07   (   0.13,-128.33) (  -0.34,-130.55)  251.74                80
 03/09/2021   21:59:50   (   0.13,-128.34) (   0.68,-125.96)  272.13                80