Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 10 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/26/2021   22:14:14   (  -0.19,-128.36) (  -0.20,-128.38)    3.00                80
 10/29/2021   10:16:42   (   0.17,-128.39) (   0.32,-128.96)   65.57                80
 10/30/2021   10:00:23   (   0.18,-128.40) (  -0.70,-124.37)  459.11                80
 10/31/2021   22:19:19   (  -0.15,-128.40) (  -0.42,-129.58)  134.82                80
 11/01/2021   22:03:01   (  -0.16,-128.41) (   0.60,-124.99)  389.75                80
 11/03/2021   10:21:47   (   0.13,-128.42) (   0.54,-130.16)  198.38                80
 11/04/2021   10:05:29   (   0.15,-128.43) (  -0.48,-125.57)  325.76                80
 11/05/2021   22:24:25   (  -0.12,-128.42) (  -0.64,-130.78)  269.40                80
 11/06/2021   22:08:07   (  -0.13,-128.41) (   0.39,-126.19)  254.28                80