Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 4 28.  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) (   0.20,-128.25)   79.31                80
 04/29/2021   09:49:12   (   0.03,-127.50) (  -0.83,-123.66)  438.30                80
 04/30/2021   22:10:47   (  -0.04,-127.42) (  -0.38,-128.86)  164.46                80
 05/01/2021   21:54:30   (  -0.03,-127.38) (   0.65,-124.27)  353.72                80
 05/03/2021   10:15:58   (   0.04,-127.33) (   0.51,-129.45)  241.80                80
 05/04/2021   09:54:21   (   0.04,-127.28) (  -0.52,-124.86)  275.55                80
 05/05/2021   22:15:56   (  -0.05,-127.18) (  -0.69,-130.07)  328.75                80
 05/06/2021   21:59:39   (  -0.04,-127.14) (   0.34,-125.48)  189.40                80
 05/08/2021   10:21:06   (   0.05,-127.10) (   0.88,-130.64)  404.93                80
 05/09/2021   09:59:28   (   0.04,-127.05) (  -0.16,-126.06)  112.28                80
 05/10/2021   22:21:04   (  -0.04,-126.93) (  -1.05,-131.26)  493.96                80
 05/11/2021   22:04:46   (  -0.04,-126.88) (  -0.01,-126.67)   23.76                80