Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 1 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/24/2020   10:26:07   (   0.04,-137.20) (  -0.52,-134.63)  292.36                80
 01/25/2020   22:50:27   (  -0.05,-137.21) (  -0.63,-139.88)  303.52                80
 01/26/2020   22:28:52   (  -0.05,-137.21) (   0.40,-135.30)  218.20                80
 01/28/2020   10:53:02   (   0.06,-137.21) (   0.77,-140.50)  374.23                80
 01/29/2020   10:31:25   (   0.05,-137.21) (  -0.21,-135.91)  147.24                80
 01/30/2020   22:55:46   (  -0.06,-137.21) (  -0.94,-141.15)  449.44                80
 01/31/2020   22:34:10   (  -0.06,-137.20) (   0.09,-136.58)   71.69                80
 02/03/2020   10:36:45   (   0.06,-137.18) (   0.04,-137.20)    3.03                80
 02/05/2020   22:42:09   (  -0.07,-137.15) (  -0.21,-137.85)   79.15                80
 02/06/2020   22:20:32   (  -0.07,-137.14) (   0.76,-133.26)  440.76                80