Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 3 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 03/29/2021   22:17:49   (   0.05,-128.35) (  -0.51,-130.81)  280.15                80
 03/30/2021   22:01:32   (   0.06,-128.35) (   0.51,-126.22)  241.68                80
 04/01/2021   10:23:00   (  -0.04,-128.32) (   0.65,-131.40)  351.53                80
 04/02/2021   10:01:23   (  -0.05,-128.30) (  -0.37,-126.81)  169.05                80
 04/03/2021   22:22:59   (   0.04,-128.28) (  -0.80,-132.03)  426.98                80
 04/04/2021   22:06:42   (   0.04,-128.26) (   0.23,-127.44)   94.14                80
 04/06/2021   10:28:10   (  -0.02,-128.24) (   0.94,-132.62)  498.74                80
 04/07/2021   10:06:32   (  -0.03,-128.22) (  -0.09,-128.03)   21.57                80
 04/09/2021   22:09:10   (   0.03,-128.17) (  -0.10,-128.64)   54.81                80
 04/10/2021   21:52:53   (   0.03,-128.15) (   0.93,-124.05)  466.23                80