Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 7 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/15/2020   10:51:56   (   0.03,-137.19) (   0.61,-139.85)  302.73                80
 07/16/2020   10:30:19   (   0.02,-137.18) (  -0.40,-135.26)  218.31                80
 07/17/2020   22:54:38   (  -0.01,-137.17) (  -0.78,-140.49)  378.96                80
 07/18/2020   22:33:02   (  -0.00,-137.16) (   0.29,-135.92)  141.47                80
 07/20/2020   10:57:13   (  -0.01,-137.13) (   0.85,-141.12)  453.42                80
 07/21/2020   10:35:36   (  -0.02,-137.11) (  -0.16,-136.53)   66.65                80
 07/23/2020   22:38:18   (   0.02,-137.07) (   0.01,-137.18)   11.96                80
 07/26/2020   10:40:51   (  -0.01,-137.01) (   0.19,-137.78)   87.69                80
 07/27/2020   10:24:35   (  -0.01,-136.99) (  -0.88,-133.21)  431.78                80
 07/28/2020   22:43:33   (   0.01,-136.95) (  -0.32,-138.42)  167.80                80