Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 10 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/29/2021   10:16:42   (   0.17,-128.39) (   0.31,-128.96)   65.36                80
 10/30/2021   10:00:23   (   0.18,-128.40) (  -0.71,-124.37)  459.32                80
 10/31/2021   22:19:20   (  -0.15,-128.41) (  -0.42,-129.58)  134.29                80
 11/01/2021   22:03:01   (  -0.16,-128.41) (   0.61,-124.99)  390.31                80
 11/03/2021   10:21:47   (   0.13,-128.43) (   0.53,-130.16)  198.01                80
 11/04/2021   10:05:29   (   0.15,-128.43) (  -0.49,-125.57)  326.15                80
 11/05/2021   22:24:25   (  -0.12,-128.42) (  -0.63,-130.78)  268.72                80
 11/06/2021   22:08:06   (  -0.14,-128.42) (   0.34,-126.18)  255.00                80
 11/08/2021   10:26:53   (   0.10,-128.42) (   0.75,-131.36)  334.81                80
 11/09/2021   10:10:35   (   0.12,-128.41) (  -0.28,-126.77)  188.34                80