Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 2 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 02/14/2020   10:28:27   (   0.03,-137.21) (  -0.41,-135.17)  232.39                80
 02/15/2020   22:50:07   (  -0.04,-137.21) (  -0.74,-140.41)  364.38                80
 02/16/2020   22:33:51   (  -0.04,-137.21) (   0.24,-135.83)  156.71                80
 02/18/2020   10:55:21   (   0.04,-137.19) (   0.92,-141.02)  437.19                80
 02/19/2020   10:33:46   (   0.05,-137.18) (  -0.12,-136.45)   83.40                80
 02/21/2020   22:39:09   (  -0.05,-137.16) (  -0.05,-137.10)    6.02                80
 02/24/2020   10:41:44   (   0.06,-137.12) (   0.18,-137.72)   68.36                80
 02/25/2020   10:20:09   (   0.05,-137.11) (  -0.86,-133.15)  451.71                80
 02/26/2020   22:41:48   (  -0.06,-137.09) (  -0.33,-138.38)  147.01                80
 02/27/2020   22:25:32   (  -0.06,-137.07) (   0.65,-133.79)  372.89                80