Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 6 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)
 06/26/2019   10:41:44   (  -0.00,-137.21) (   0.10,-137.74)   60.85                80
 06/27/2019   10:20:09   (  -0.00,-137.21) (  -0.88,-133.16)  459.99                80
 06/28/2019   22:41:50   (   0.01,-137.18) (  -0.26,-138.41)  140.30                80
 06/29/2019   22:25:35   (   0.01,-137.18) (   0.78,-133.85)  380.13                80
 07/01/2019   10:47:07   (  -0.02,-137.18) (   0.42,-139.05)  212.77                80
 07/02/2019   10:25:32   (  -0.01,-137.17) (  -0.63,-134.48)  306.95                80
 07/03/2019   22:47:13   (   0.01,-137.13) (  -0.56,-139.72)  295.14                80
 07/04/2019   22:30:57   (   0.01,-137.11) (   0.43,-135.14)  224.40                80
 07/06/2019   10:49:49   (  -0.00,-137.11) (   0.72,-140.35)  369.50                80
 07/07/2019   10:30:54   (   0.00,-137.09) (  -0.26,-135.77)  149.67                80
 07/08/2019   22:52:34   (  -0.00,-137.04) (  -0.91,-141.01)  453.49                80