Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 4 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)
 04/25/2019   22:52:48   (   0.00,-137.18) (  -0.82,-140.98)  432.63                80
 04/26/2019   22:36:32   (   0.00,-137.17) (   0.15,-136.40)   87.72                80
 04/29/2019   10:36:31   (  -0.00,-137.17) (  -0.06,-137.05)   14.48                80
 05/01/2019   22:39:17   (   0.00,-137.12) (  -0.12,-137.72)   67.82                80
 05/02/2019   22:23:03   (   0.00,-137.11) (   0.91,-133.15)  451.78                80
 05/04/2019   10:44:35   (  -0.01,-137.11) (   0.27,-138.36)  142.33                80
 05/05/2019   10:23:00   (  -0.01,-137.09) (  -0.76,-133.79)  376.24                80
 05/06/2019   22:44:41   (   0.01,-137.03) (  -0.45,-139.03)  227.67                80
 05/07/2019   22:28:26   (   0.02,-137.01) (   0.58,-134.46)  290.75                80