Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 4 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/01/2019   22:39:16   (  -0.00,-137.20) (  -0.14,-137.71)   59.02                80
 05/02/2019   22:23:02   (  -0.00,-137.20) (   0.89,-133.15)  462.16                80
 05/04/2019   10:44:34   (   0.00,-137.22) (   0.28,-138.35)  130.18                80
 05/05/2019   10:23:00   (   0.00,-137.21) (  -0.76,-133.79)  390.04                80
 05/06/2019   22:44:41   (   0.00,-137.18) (  -0.40,-139.04)  210.81                80
 05/07/2019   22:28:27   (   0.00,-137.18) (   0.64,-134.47)  309.14                80
 05/09/2019   10:49:59   (  -0.01,-137.18) (   0.53,-139.68)  284.47                80
 05/10/2019   10:28:23   (  -0.02,-137.16) (  -0.45,-135.10)  234.49                80
 05/11/2019   22:50:05   (   0.01,-137.11) (  -0.71,-140.35)  368.52                80
 05/12/2019   22:33:50   (   0.01,-137.10) (   0.33,-135.78)  150.82                80