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

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/17/2020   22:54:38   (  -0.03,-137.19) (  -0.75,-140.50)  375.69                80
 07/18/2020   22:33:02   (  -0.03,-137.19) (   0.27,-135.91)  146.18                80
 07/20/2020   10:57:12   (   0.02,-137.19) (   0.88,-141.11)  445.97                80
 07/21/2020   10:35:36   (   0.02,-137.19) (  -0.13,-136.53)   75.51                80
 07/23/2020   22:38:18   (  -0.02,-137.17) (  -0.03,-137.17)    0.64                80
 07/26/2020   10:40:51   (   0.02,-137.15) (   0.17,-137.78)   72.18                80
 07/27/2020   10:24:35   (   0.02,-137.14) (  -0.84,-133.20)  448.59                80
 07/28/2020   22:43:33   (  -0.02,-137.11) (  -0.32,-138.43)  149.53                80
 07/29/2020   22:27:18   (   0.01,-137.10) (   0.75,-133.86)  369.97                80