Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 4 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/04/2020   22:24:48   (   0.01,-137.19) (   0.83,-133.56)  413.32                80
 04/06/2020   10:46:19   (  -0.01,-137.19) (   0.32,-138.77)  179.04                80
 04/07/2020   10:24:43   (  -0.01,-137.18) (  -0.67,-134.18)  341.74                80
 04/08/2020   22:46:21   (   0.01,-137.15) (  -0.51,-139.41)  257.04                80
 04/09/2020   22:30:06   (   0.02,-137.14) (   0.54,-134.83)  263.50                80
 04/11/2020   10:51:36   (  -0.02,-137.14) (   0.66,-140.02)  329.86                80
 04/12/2020   10:30:01   (  -0.02,-137.12) (  -0.39,-135.45)  190.11                80
 04/13/2020   22:51:39   (   0.01,-137.08) (  -0.78,-140.68)  410.03                80
 04/14/2020   22:35:22   (   0.01,-137.06) (   0.22,-136.09)  109.88                80
 04/16/2020   10:56:54   (  -0.01,-137.05) (   0.93,-141.30)  484.01                80
 04/17/2020   10:35:17   (  -0.00,-137.02) (  -0.07,-136.71)   35.56                80