Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 4 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/13/2020   22:51:39   (   0.02,-137.19) (  -0.78,-140.68)  397.58                80
 04/14/2020   22:35:24   (   0.02,-137.19) (   0.27,-136.10)  123.47                80
 04/16/2020   10:56:54   (  -0.01,-137.17) (   0.94,-141.29)  470.35                80
 04/17/2020   10:35:18   (  -0.01,-137.16) (  -0.11,-136.72)   50.34                80
 04/19/2020   22:38:01   (   0.01,-137.14) (  -0.02,-137.37)   26.64                80
 04/20/2020   22:21:45   (   0.01,-137.12) (   0.97,-132.79)  494.00                80
 04/22/2020   10:43:16   (  -0.01,-137.10) (   0.18,-137.99)  100.68                80
 04/23/2020   10:21:40   (  -0.01,-137.09) (  -0.81,-133.40)  419.27                80
 04/24/2020   22:43:18   (   0.01,-137.06) (  -0.37,-138.63)  179.77                80
 04/25/2020   22:27:02   (   0.01,-137.04) (   0.68,-134.06)  339.85                80