Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 11 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)
 11/30/2021   10:17:18   (   0.01,-128.20) (   0.16,-128.88)   77.34                80
 12/01/2021   10:01:36   (   0.03,-128.18) (  -0.83,-124.43)  427.30                80
 12/02/2021   22:21:27   (  -0.00,-128.15) (  -0.38,-129.87)  195.77                80
 12/03/2021   22:05:44   (  -0.02,-128.12) (   0.61,-125.42)  308.49                80
 12/05/2021   10:25:26   (  -0.01,-128.07) (   0.59,-130.81)  312.31                80
 12/06/2021   10:09:42   (   0.01,-128.04) (  -0.35,-126.35)  191.34                80
 12/07/2021   22:29:34   (   0.02,-127.99) (  -0.86,-131.79)  433.36                80
 12/08/2021   22:13:51   (   0.01,-127.96) (   0.13,-127.34)   70.29                80
 12/11/2021   10:15:10   (  -0.02,-127.88) (   0.07,-128.29)   47.01                80
 12/12/2021   09:59:27   (  -0.01,-127.84) (  -0.92,-123.84)  456.50                80
 12/13/2021   22:19:19   (   0.03,-127.80) (  -0.27,-129.28)  168.30                80