Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 9 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/29/2019   10:43:50   (  -0.03,-137.21) (   0.25,-138.34)  129.60                80
 09/30/2019   10:22:15   (  -0.03,-137.21) (  -0.82,-133.77)  391.64                80
 10/01/2019   22:46:36   (   0.01,-137.20) (  -0.38,-139.01)  205.99                80
 10/02/2019   22:25:00   (   0.01,-137.20) (   0.63,-134.44)  314.95                80
 10/04/2019   10:49:12   (   0.00,-137.19) (   0.53,-139.64)  278.43                80
 10/05/2019   10:27:36   (  -0.00,-137.19) (  -0.48,-135.06)  241.95                80
 10/06/2019   22:51:56   (  -0.00,-137.17) (  -0.71,-140.30)  357.07                80
 10/07/2019   22:30:21   (   0.00,-137.16) (   0.30,-135.73)  163.08                80
 10/09/2019   10:54:32   (   0.00,-137.15) (   0.86,-140.93)  431.17                80
 10/10/2019   10:32:57   (  -0.00,-137.14) (  -0.15,-136.36)   88.79                80