Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 4 29.  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   10:36:30   (   0.00,-137.21) (  -0.01,-137.04)   18.64                80
 05/01/2019   22:39:17   (  -0.00,-137.18) (  -0.11,-137.72)   60.91                80
 05/02/2019   22:23:02   (  -0.00,-137.18) (   0.93,-133.15)  459.51                80
 05/04/2019   10:44:35   (  -0.00,-137.18) (   0.24,-138.36)  133.84                80
 05/05/2019   10:22:59   (  -0.01,-137.17) (  -0.74,-133.78)  385.59                80
 05/06/2019   22:44:41   (   0.02,-137.13) (  -0.42,-139.03)  216.69                80
 05/07/2019   22:28:26   (   0.02,-137.12) (   0.62,-134.46)  302.60                80
 05/09/2019   10:49:58   (  -0.01,-137.11) (   0.54,-139.67)  291.55                80
 05/10/2019   10:28:23   (  -0.00,-137.09) (  -0.43,-135.09)  227.02                80
 05/11/2019   22:50:04   (   0.00,-137.03) (  -0.72,-140.34)  377.20                80
 05/12/2019   22:33:49   (  -0.00,-137.01) (   0.26,-135.76)  141.41                80