Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 4 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/28/2021   10:10:50   (   0.03,-127.55) (   0.20,-128.25)   79.23                80
 04/29/2021   09:49:12   (   0.03,-127.51) (  -0.83,-123.66)  438.36                80
 04/30/2021   22:10:47   (  -0.03,-127.42) (  -0.37,-128.86)  164.81                80
 05/01/2021   21:54:30   (  -0.03,-127.37) (   0.66,-124.27)  353.33                80
 05/03/2021   10:15:58   (   0.04,-127.33) (   0.50,-129.45)  241.88                80
 05/04/2021   09:54:21   (   0.03,-127.28) (  -0.54,-124.87)  275.48                80
 05/05/2021   22:15:56   (  -0.04,-127.18) (  -0.66,-130.07)  329.21                80
 05/06/2021   21:59:38   (  -0.04,-127.13) (   0.31,-125.47)  188.93                80
 05/08/2021   10:21:06   (   0.04,-127.10) (   0.85,-130.65)  405.10                80
 05/09/2021   09:59:28   (   0.04,-127.04) (  -0.19,-126.06)  112.07                80