Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 10 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/23/2021   10:30:35   (   0.18,-128.32) (   1.07,-132.37)  460.61                80
 10/24/2021   10:14:17   (   0.20,-128.34) (   0.05,-127.78)   64.88                80
 10/26/2021   22:14:14   (  -0.19,-128.36) (  -0.22,-128.38)    4.28                80
 10/29/2021   10:16:42   (   0.17,-128.39) (   0.28,-128.97)   65.61                80
 10/30/2021   10:00:24   (   0.18,-128.40) (  -0.74,-124.38)  459.03                80
 10/31/2021   22:19:20   (  -0.15,-128.40) (  -0.39,-129.59)  135.21                80
 11/01/2021   22:03:02   (  -0.16,-128.41) (   0.64,-125.00)  389.38                80
 11/03/2021   10:21:48   (   0.13,-128.43) (   0.51,-130.17)  198.50                80
 11/04/2021   10:05:30   (   0.15,-128.43) (  -0.51,-125.58)  325.63                80
 11/05/2021   22:24:25   (  -0.12,-128.42) (  -0.67,-130.78)  269.81                80