Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 10 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/20/2021   22:28:07   (  -0.20,-128.27) (  -0.99,-131.78)  401.10                80
 10/21/2021   22:11:48   (  -0.21,-128.29) (   0.03,-127.19)  124.91                80
 10/23/2021   10:30:34   (   0.18,-128.33) (   1.11,-132.36)  460.39                80
 10/24/2021   10:14:16   (   0.20,-128.34) (   0.09,-127.77)   65.14                80
 10/26/2021   22:14:14   (  -0.19,-128.36) (  -0.19,-128.39)    3.20                80
 10/29/2021   10:16:42   (   0.17,-128.40) (   0.30,-128.97)   64.86                80
 10/30/2021   10:00:23   (   0.18,-128.41) (  -0.72,-124.37)  459.87                80
 10/31/2021   22:19:19   (  -0.15,-128.41) (  -0.40,-129.59)  134.69                80
 11/01/2021   22:03:01   (  -0.16,-128.41) (   0.63,-125.00)  389.97                80