Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 10 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/30/2021   10:00:23   (   0.18,-128.40) (  -0.70,-124.36)  459.88                80
 10/31/2021   22:19:19   (  -0.15,-128.41) (  -0.43,-129.58)  133.14                80
 11/01/2021   22:03:01   (  -0.16,-128.42) (   0.60,-124.98)  391.65                80
 11/03/2021   10:21:47   (   0.13,-128.44) (   0.54,-130.16)  196.73                80
 11/04/2021   10:05:29   (   0.15,-128.44) (  -0.49,-125.56)  327.61                80
 11/05/2021   22:24:25   (  -0.12,-128.44) (  -0.63,-130.78)  266.64                80
 11/06/2021   22:08:06   (  -0.14,-128.44) (   0.40,-126.19)  257.24                80
 11/08/2021   10:26:53   (   0.11,-128.44) (   0.74,-131.36)  332.61                80
 11/09/2021   10:10:34   (   0.12,-128.43) (  -0.28,-126.76)  190.72                80
 11/10/2021   22:29:30   (  -0.09,-128.42) (  -0.88,-131.97)  404.90                80
 11/11/2021   22:13:11   (  -0.10,-128.41) (   0.15,-127.37)  118.45                80