Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 7 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/13/2020   22:27:46   (  -0.03,-137.20) (   0.55,-134.66)  289.84                80
 07/15/2020   10:51:56   (   0.02,-137.19) (   0.59,-139.85)  302.88                80
 07/16/2020   10:30:20   (   0.01,-137.18) (  -0.42,-135.27)  218.12                80
 07/17/2020   22:51:58   (  -0.00,-137.17) (  -0.76,-140.49)  379.56                80
 07/18/2020   22:35:43   (   0.01,-137.15) (   0.32,-135.93)  140.90                80
 07/20/2020   10:57:12   (  -0.01,-137.13) (   0.89,-141.11)  453.43                80
 07/21/2020   10:35:36   (  -0.01,-137.12) (  -0.12,-136.52)   66.81                80
 07/23/2020   22:38:17   (   0.01,-137.07) (  -0.03,-137.17)   12.18                80
 07/26/2020   10:40:51   (  -0.01,-137.02) (   0.18,-137.78)   87.64                80