Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 1 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/28/2020   10:53:02   (   0.05,-137.21) (   0.77,-140.50)  374.02                80
 01/29/2020   10:31:26   (   0.04,-137.21) (  -0.26,-135.92)  147.43                80
 01/30/2020   22:55:46   (  -0.05,-137.21) (  -0.95,-141.15)  449.50                80
 01/31/2020   22:34:10   (  -0.05,-137.20) (   0.09,-136.57)   71.65                80
 02/03/2020   10:36:45   (   0.05,-137.19) (   0.05,-137.20)    1.41                80
 02/05/2020   22:42:09   (  -0.06,-137.15) (  -0.22,-137.85)   79.22                80
 02/06/2020   22:20:33   (  -0.06,-137.14) (   0.81,-133.27)  440.67                80
 02/08/2020   10:44:44   (   0.07,-137.11) (   0.35,-138.47)  154.42                80
 02/09/2020   10:23:07   (   0.07,-137.09) (  -0.62,-133.88)  365.01                80
 02/10/2020   22:47:27   (  -0.08,-137.06) (  -0.52,-139.12)  235.08                80