Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 7 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/22/2019   10:49:43   (  -0.02,-137.20) (   0.55,-139.70)  285.70                80
 07/23/2019   10:28:09   (  -0.02,-137.19) (  -0.50,-135.14)  234.82                80
 07/24/2019   22:49:49   (   0.03,-137.17) (  -0.66,-140.38)  364.69                80
 07/25/2019   22:33:34   (   0.03,-137.17) (   0.33,-135.80)  155.51                80
 07/27/2019   10:55:06   (  -0.03,-137.16) (   0.84,-141.01)  438.90                80
 07/28/2019   10:33:31   (  -0.03,-137.15) (  -0.20,-136.44)   80.56                80
 07/30/2019   22:36:16   (   0.04,-137.09) (   0.05,-137.11)    2.22                80
 08/02/2019   10:38:54   (  -0.05,-137.05) (   0.08,-137.75)   79.32                80
 08/03/2019   10:22:39   (  -0.05,-137.03) (  -0.91,-133.17)  439.27                80
 08/04/2019   22:41:38   (   0.05,-136.98) (  -0.29,-138.40)  163.43                80