Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 5 1.  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   22:39:17   (  -0.00,-137.20) (  -0.11,-137.72)   59.36                80
 05/02/2019   22:23:02   (  -0.00,-137.20) (   0.92,-133.15)  461.77                80
 05/04/2019   10:44:35   (   0.00,-137.21) (   0.25,-138.36)  130.45                80
 05/05/2019   10:23:00   (   0.00,-137.21) (  -0.79,-133.79)  389.78                80
 05/06/2019   22:44:40   (   0.00,-137.18) (  -0.43,-139.03)  211.16                80
 05/07/2019   22:28:26   (   0.00,-137.17) (   0.61,-134.46)  308.78                80
 05/09/2019   10:49:58   (  -0.01,-137.18) (   0.56,-139.67)  284.69                80
 05/10/2019   10:28:24   (  -0.02,-137.16) (  -0.48,-135.10)  234.26                80
 05/11/2019   22:50:05   (   0.02,-137.11) (  -0.68,-140.35)  368.91                80
 05/12/2019   22:33:50   (   0.01,-137.09) (   0.30,-135.77)  150.36                80
 05/14/2019   10:55:22   (  -0.02,-137.10) (   0.86,-140.98)  443.31                80