Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 1 2.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/02/2020   10:45:22   (   0.03,-137.22) (   0.33,-138.68)  165.74                80
 01/03/2020   10:23:47   (   0.02,-137.22) (  -0.70,-134.11)  355.96                80
 01/04/2020   22:48:06   (  -0.03,-137.22) (  -0.47,-139.34)  240.73                80
 01/05/2020   22:26:30   (  -0.03,-137.22) (   0.55,-134.76)  280.59                80
 01/07/2020   10:50:41   (   0.04,-137.22) (   0.66,-139.95)  312.30                80
 01/08/2020   10:29:05   (   0.03,-137.21) (  -0.37,-135.38)  208.38                80
 01/09/2020   22:53:25   (  -0.04,-137.19) (  -0.81,-140.61)  390.04                80
 01/10/2020   22:31:49   (  -0.04,-137.18) (   0.22,-136.04)  130.08                80
 01/12/2020   10:55:59   (   0.05,-137.16) (   0.99,-141.23)  464.31                80
 01/13/2020   10:34:24   (   0.04,-137.14) (  -0.04,-136.65)   55.44                80
 01/15/2020   22:39:48   (  -0.05,-137.09) (  -0.11,-137.31)   24.92                80