Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 10 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)
 10/24/2021   10:14:16   (   0.20,-128.34) (   0.07,-127.77)   64.85                80
 10/26/2021   22:16:54   (  -0.18,-128.36) (  -0.18,-128.39)    3.26                80
 10/29/2021   10:16:42   (   0.17,-128.39) (   0.30,-128.97)   65.57                80
 10/30/2021   10:00:24   (   0.18,-128.40) (  -0.72,-124.37)  459.05                80
 10/31/2021   22:19:20   (  -0.15,-128.40) (  -0.41,-129.59)  135.01                80
 11/01/2021   22:03:01   (  -0.16,-128.41) (   0.61,-124.99)  389.53                80
 11/03/2021   10:21:48   (   0.13,-128.42) (   0.53,-130.16)  198.48                80
 11/04/2021   10:05:29   (   0.15,-128.43) (  -0.49,-125.57)  325.63                80
 11/05/2021   22:24:26   (  -0.12,-128.42) (  -0.63,-130.79)  269.67                80
 11/06/2021   22:08:07   (  -0.13,-128.41) (   0.39,-126.19)  254.00                80