Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 3 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 03/08/2020   22:36:09   (  -0.01,-137.20) (   0.17,-136.35)   95.51                80
 03/10/2020   10:57:40   (   0.00,-137.19) (   1.01,-141.55)  497.92                80
 03/11/2020   10:36:04   (   0.00,-137.18) (  -0.04,-136.98)   22.70                80
 03/13/2020   22:38:48   (   0.01,-137.15) (  -0.09,-137.64)   55.19                80
 03/14/2020   22:22:32   (   0.01,-137.14) (   0.90,-133.05)  465.06                80
 03/16/2020   10:44:03   (  -0.01,-137.11) (   0.23,-138.26)  129.63                80
 03/17/2020   10:22:26   (  -0.00,-137.10) (  -0.76,-133.67)  390.27                80
 03/18/2020   22:44:06   (  -0.00,-137.07) (  -0.40,-138.90)  209.04                80
 03/19/2020   22:27:49   (  -0.00,-137.05) (   0.59,-134.32)  310.69                80
 03/21/2020   10:49:21   (   0.00,-137.02) (   0.54,-139.52)  284.70                80
 03/22/2020   10:27:44   (   0.00,-137.00) (  -0.44,-134.94)  234.72                80