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,-137.19) (  -0.05,-137.50)   35.20                80
 12/10/2019   22:18:48   (  -0.01,-137.18) (   0.97,-132.92)  485.71                80
 12/12/2019   10:42:59   (   0.01,-137.17) (   0.22,-138.12)  108.26                80
 12/13/2019   10:21:23   (   0.01,-137.16) (  -0.80,-133.55)  411.72                80
 12/14/2019   22:45:43   (  -0.01,-137.13) (  -0.35,-138.78)  187.79                80
 12/15/2019   22:24:07   (  -0.00,-137.11) (   0.67,-134.21)  331.77                80
 12/17/2019   10:48:19   (   0.01,-137.09) (   0.52,-139.41)  263.55                80
 12/18/2019   10:26:43   (  -0.00,-137.07) (  -0.50,-134.83)  255.63                80
 12/19/2019   22:51:02   (  -0.01,-137.04) (  -0.66,-140.07)  344.80                80
 12/20/2019   22:29:27   (  -0.00,-137.02) (   0.37,-135.49)  174.30                80
 12/22/2019   10:53:38   (   0.01,-136.99) (   0.82,-140.69)  421.58                80