Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 7 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/29/2020   22:27:17   (  -0.03,-137.20) (   0.73,-133.84)  382.14                80
 07/31/2020   10:48:48   (  -0.02,-137.20) (   0.37,-139.05)  211.03                80
 08/01/2020   10:27:12   (  -0.02,-137.19) (  -0.64,-134.47)  310.49                80
 08/02/2020   22:48:49   (   0.01,-137.18) (  -0.57,-139.69)  286.46                80
 08/03/2020   22:32:33   (   0.01,-137.17) (   0.45,-135.10)  234.96                80
 08/05/2020   10:54:03   (  -0.01,-137.16) (   0.71,-140.30)  357.67                80
 08/06/2020   10:32:27   (  -0.01,-137.15) (  -0.30,-135.71)  163.58                80
 08/07/2020   22:54:05   (   0.01,-137.14) (  -0.84,-140.94)  433.92                80
 08/08/2020   22:37:48   (   0.01,-137.13) (   0.17,-136.36)   87.09                80
 08/11/2020   10:40:22   (  -0.01,-137.10) (  -0.02,-136.97)   14.24                80