Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 6 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/30/2020   10:33:27   (   0.02,-137.20) (  -0.21,-136.07)  128.66                80
 07/01/2020   22:57:47   (  -0.01,-137.20) (  -0.94,-141.30)  467.86                80
 07/02/2020   22:36:11   (  -0.00,-137.19) (   0.13,-136.73)   53.85                80
 07/05/2020   10:41:24   (  -0.01,-137.19) (   0.05,-137.33)   16.97                80
 07/07/2020   22:41:27   (   0.01,-137.17) (  -0.17,-137.98)   92.76                80
 07/08/2020   22:25:10   (   0.01,-137.17) (   0.84,-133.40)  428.56                80
 07/10/2020   10:46:41   (  -0.01,-137.16) (   0.29,-138.60)  163.78                80
 07/11/2020   10:25:04   (  -0.01,-137.15) (  -0.72,-134.02)  357.34                80
 07/12/2020   22:46:42   (   0.01,-137.13) (  -0.46,-139.24)  240.53                80