Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 7 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/01/2020   22:57:47   (  -0.02,-137.20) (  -0.92,-141.30)  467.68                80
 07/02/2020   22:36:10   (  -0.01,-137.20) (   0.09,-136.72)   54.04                80
 07/05/2020   10:41:24   (  -0.01,-137.19) (   0.03,-137.34)   16.45                80
 07/07/2020   22:41:27   (   0.01,-137.17) (  -0.16,-137.99)   92.38                80
 07/08/2020   22:25:11   (   0.01,-137.17) (   0.85,-133.40)  428.98                80
 07/10/2020   10:46:41   (  -0.01,-137.16) (   0.29,-138.60)  163.33                80
 07/11/2020   10:25:04   (  -0.01,-137.16) (  -0.72,-134.02)  357.84                80
 07/12/2020   22:46:43   (   0.01,-137.14) (  -0.46,-139.24)  239.92                80
 07/13/2020   22:30:26   (   0.01,-137.13) (   0.55,-134.66)  280.92                80