Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 7 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/26/2020   10:43:32   (   0.00,-137.20) (   0.14,-137.78)   67.08                80
 07/27/2020   10:21:55   (   0.00,-137.20) (  -0.87,-133.20)  454.85                80
 07/28/2020   22:43:34   (  -0.01,-137.19) (  -0.29,-138.43)  141.81                80
 07/29/2020   22:27:17   (  -0.01,-137.18) (   0.72,-133.84)  379.75                80
 07/31/2020   10:48:47   (   0.01,-137.18) (   0.44,-139.04)  212.60                80
 08/01/2020   10:27:11   (   0.02,-137.17) (  -0.57,-134.46)  308.52                80
 08/02/2020   22:48:49   (  -0.02,-137.14) (  -0.58,-139.68)  289.28                80
 08/03/2020   22:32:33   (  -0.02,-137.13) (   0.43,-135.10)  231.68                80
 08/05/2020   10:54:03   (   0.02,-137.13) (   0.73,-140.29)  361.37                80
 08/06/2020   10:32:27   (   0.02,-137.11) (  -0.28,-135.71)  159.39                80
 08/07/2020   22:54:05   (  -0.02,-137.09) (  -0.86,-140.94)  438.93                80