Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 2 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)
 02/19/2020   10:33:45   (   0.04,-137.21) (  -0.11,-136.45)   87.09                80
 02/21/2020   22:39:10   (  -0.04,-137.22) (   0.01,-137.11)   12.92                80
 02/24/2020   10:41:44   (   0.04,-137.20) (   0.17,-137.72)   59.69                80
 02/25/2020   10:20:09   (   0.04,-137.20) (  -0.87,-133.15)  461.39                80
 02/26/2020   22:41:48   (  -0.04,-137.19) (  -0.32,-138.38)  135.40                80
 02/27/2020   22:25:32   (  -0.04,-137.19) (   0.72,-133.81)  385.47                80
 02/29/2020   10:47:03   (   0.05,-137.17) (   0.45,-139.00)  209.02                80
 03/01/2020   10:25:27   (   0.05,-137.15) (  -0.59,-134.43)  311.33                80
 03/02/2020   22:47:06   (  -0.05,-137.13) (  -0.64,-139.65)  286.92                80
 03/03/2020   22:30:50   (  -0.06,-137.12) (   0.40,-135.07)  232.97                80