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) (  -0.67,-140.06)  324.37                80
 12/20/2019   22:29:27   (  -0.01,-137.22) (   0.35,-135.48)  196.81                80
 12/22/2019   10:53:39   (   0.02,-137.21) (   0.77,-140.70)  396.59                80
 12/23/2019   10:32:03   (   0.01,-137.20) (  -0.26,-136.12)  124.18                80
 12/24/2019   22:56:22   (  -0.02,-137.19) (  -0.97,-141.34)  473.65                80
 12/25/2019   22:34:46   (  -0.02,-137.18) (   0.06,-136.77)   46.73                80
 12/28/2019   10:40:02   (   0.02,-137.15) (   0.10,-137.39)   27.84                80
 12/29/2019   10:18:27   (   0.01,-137.14) (  -0.93,-132.82)  492.14                80
 12/30/2019   22:42:46   (  -0.02,-137.12) (  -0.24,-138.05)  106.69                80
 12/31/2019   22:21:10   (  -0.01,-137.10) (   0.78,-133.48)  413.07                80