Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 11 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/20/2021   10:03:44   (   0.07,-128.38) (  -0.71,-125.02)  383.78                80
 11/21/2021   22:23:42   (  -0.05,-128.36) (  -0.50,-130.48)  241.17                80
 11/22/2021   22:08:05   (  -0.06,-128.35) (   0.47,-126.06)  261.37                80
 11/24/2021   10:28:00   (   0.03,-128.32) (   0.74,-131.50)  363.08                80
 11/25/2021   10:12:27   (   0.04,-128.30) (  -0.21,-127.09)  136.97                80
 11/26/2021   22:32:38   (  -0.01,-128.27) (  -0.98,-132.61)  495.49                80
 11/27/2021   22:17:11   (  -0.02,-128.25) (  -0.00,-128.23)    3.09                80
 11/28/2021   21:59:04   (  -0.04,-128.22) (   0.94,-123.84)  499.57                80
 11/30/2021   10:19:15   (   0.01,-128.19) (   0.29,-129.35)  132.90                80
 12/01/2021   10:03:53   (   0.02,-128.16) (  -0.69,-124.99)  361.70                80
 12/02/2021   22:24:21   (   0.00,-128.12) (  -0.53,-130.58)  279.48                80