Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 11 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/22/2019   10:18:58   (   0.00,-137.23) (  -0.93,-132.97)  484.74                80
 11/23/2019   22:40:38   (  -0.00,-137.24) (  -0.25,-138.21)  110.94                80
 11/24/2019   22:24:23   (  -0.01,-137.24) (   0.83,-133.64)  411.11                80
 11/26/2019   10:45:54   (   0.01,-137.25) (   0.36,-138.84)  181.27                80
 11/27/2019   10:24:19   (   0.02,-137.25) (  -0.65,-134.27)  340.34                80
 11/28/2019   22:45:58   (  -0.02,-137.25) (  -0.51,-139.50)  256.36                80
 11/29/2019   22:27:03   (  -0.02,-137.25) (   0.50,-134.93)  264.86                80
 12/01/2019   10:51:14   (   0.03,-137.25) (   0.69,-140.12)  328.59                80
 12/02/2019   10:29:39   (   0.02,-137.24) (  -0.33,-135.55)  192.33                80
 12/03/2019   22:53:58   (  -0.03,-137.23) (  -0.83,-140.78)  405.12                80
 12/04/2019   22:32:22   (  -0.02,-137.23) (   0.19,-136.21)  115.61                80