Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 12 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/09/2019   22:37:43   (  -0.01,-137.17) (  -0.06,-137.50)   36.99                80
 12/10/2019   22:18:47   (  -0.01,-137.15) (   0.96,-132.92)  482.95                80
 12/12/2019   10:42:59   (   0.01,-137.13) (   0.23,-138.12)  112.37                80
 12/13/2019   10:21:23   (   0.01,-137.11) (  -0.79,-133.55)  406.72                80
 12/14/2019   22:45:43   (  -0.01,-137.07) (  -0.36,-138.78)  194.23                80
 12/15/2019   22:24:07   (  -0.00,-137.05) (   0.66,-134.21)  324.42                80
 12/17/2019   10:48:18   (   0.01,-137.01) (   0.53,-139.40)  272.32                80
 12/18/2019   10:26:43   (  -0.00,-136.99) (  -0.49,-134.83)  245.99                80
 12/19/2019   22:51:01   (  -0.00,-136.94) (  -0.72,-140.05)  355.81                80
 12/20/2019   22:29:26   (   0.00,-136.91) (   0.30,-135.48)  162.35                80