Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 7 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 07/30/2019   22:38:56   (   0.03,-137.19) (   0.05,-137.11)    9.43                80
 08/02/2019   10:38:54   (  -0.04,-137.17) (   0.07,-137.75)   65.29                80
 08/03/2019   10:22:39   (  -0.04,-137.16) (  -0.92,-133.17)  454.75                80
 08/04/2019   22:41:39   (   0.04,-137.15) (  -0.23,-138.42)  144.53                80
 08/05/2019   22:25:23   (   0.04,-137.13) (   0.77,-133.84)  375.36                80
 08/07/2019   10:44:16   (  -0.04,-137.12) (   0.41,-139.05)  220.25                80
 08/08/2019   10:28:01   (  -0.04,-137.10) (  -0.64,-134.48)  299.21                80
 08/09/2019   22:47:01   (   0.05,-137.07) (  -0.56,-139.71)  301.23                80
 08/10/2019   22:30:46   (   0.05,-137.06) (   0.50,-135.15)  217.88                80
 08/12/2019   10:49:38   (  -0.06,-137.03) (   0.68,-140.36)  378.83                80
 08/13/2019   10:33:23   (  -0.06,-137.01) (  -0.31,-135.78)  139.95                80