Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 1 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/20/2020   22:45:08   (  -0.04,-137.21) (  -0.36,-138.59)  157.53                80
 01/21/2020   22:23:32   (  -0.04,-137.21) (   0.67,-134.02)  363.42                80
 01/23/2020   10:47:42   (   0.05,-137.19) (   0.51,-139.21)  230.77                80
 01/24/2020   10:26:07   (   0.05,-137.18) (  -0.53,-134.64)  289.83                80
 01/25/2020   22:50:26   (  -0.06,-137.17) (  -0.68,-139.87)  307.48                80
 01/26/2020   22:28:51   (  -0.06,-137.16) (   0.35,-135.29)  212.99                80
 01/28/2020   10:53:01   (   0.06,-137.14) (   0.82,-140.49)  381.68                80
 01/29/2020   10:31:26   (   0.06,-137.13) (  -0.21,-135.91)  138.48                80
 01/30/2020   22:55:45   (  -0.07,-137.11) (  -0.99,-141.14)  459.63                80
 01/31/2020   22:34:10   (  -0.06,-137.10) (   0.04,-136.57)   60.28                80