Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 12 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/19/2019   22:51:02   (  -0.01,-137.22) (  -0.66,-140.06)  324.20                80
 12/20/2019   22:29:27   (  -0.01,-137.22) (   0.36,-135.49)  196.96                80
 12/22/2019   10:53:38   (   0.02,-137.21) (   0.82,-140.68)  396.57                80
 12/23/2019   10:32:03   (   0.02,-137.20) (  -0.21,-136.11)  124.19                80
 12/24/2019   22:56:22   (  -0.02,-137.19) (  -0.96,-141.34)  473.42                80
 12/25/2019   22:34:46   (  -0.02,-137.18) (   0.07,-136.77)   46.93                80
 12/28/2019   10:40:02   (   0.02,-137.15) (   0.08,-137.39)   27.65                80
 12/29/2019   10:18:27   (   0.02,-137.14) (  -0.94,-132.82)  492.24                80
 12/30/2019   22:42:46   (  -0.02,-137.12) (  -0.23,-138.05)  106.36                80
 12/31/2019   22:21:11   (  -0.02,-137.10) (   0.80,-133.48)  413.40                80
 01/02/2020   10:45:22   (   0.02,-137.08) (   0.37,-138.68)  181.82                80