Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 4 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)
 04/28/2021   10:10:50   (   0.04,-127.55) (   0.17,-128.25)   79.29                80
 04/29/2021   09:49:13   (   0.03,-127.51) (  -0.86,-123.66)  438.35                80
 04/30/2021   22:10:48   (  -0.04,-127.42) (  -0.35,-128.87)  164.61                80
 05/01/2021   21:54:30   (  -0.03,-127.38) (   0.68,-124.28)  353.56                80
 05/03/2021   10:15:58   (   0.04,-127.33) (   0.54,-129.45)  241.82                80
 05/04/2021   09:54:20   (   0.04,-127.28) (  -0.49,-124.86)  275.55                80
 05/05/2021   22:15:56   (  -0.04,-127.18) (  -0.71,-130.06)  328.94                80
 05/06/2021   21:59:38   (  -0.04,-127.14) (   0.32,-125.47)  189.20                80
 05/08/2021   10:21:06   (   0.05,-127.10) (   0.84,-130.65)  404.96                80
 05/09/2021   09:59:29   (   0.04,-127.05) (  -0.19,-126.07)  112.21                80
 05/10/2021   22:21:04   (  -0.04,-126.93) (  -1.01,-131.27)  494.15                80