Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 4 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/29/2019   10:36:31   (   0.00,-137.21) (  -0.04,-137.05)   18.44                80
 05/01/2019   22:39:16   (  -0.00,-137.18) (  -0.13,-137.72)   60.95                80
 05/02/2019   22:23:02   (  -0.00,-137.18) (   0.90,-133.15)  459.51                80
 05/04/2019   10:44:34   (   0.00,-137.18) (   0.26,-138.36)  133.74                80
 05/05/2019   10:23:00   (   0.00,-137.17) (  -0.77,-133.79)  385.78                80
 05/06/2019   22:44:40   (   0.00,-137.13) (  -0.43,-139.03)  216.26                80
 05/07/2019   22:28:26   (   0.00,-137.12) (   0.60,-134.46)  303.00                80
 05/09/2019   10:49:58   (  -0.01,-137.11) (   0.56,-139.67)  291.46                80
 05/10/2019   10:28:23   (  -0.02,-137.09) (  -0.48,-135.10)  226.81                80
 05/11/2019   22:50:04   (   0.02,-137.03) (  -0.73,-140.34)  377.45                80