Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 1 1.  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   10:45:21   (   0.03,-137.22) (   0.38,-138.67)  165.82                80
 01/03/2020   10:23:46   (   0.02,-137.22) (  -0.65,-134.09)  355.86                80
 01/04/2020   22:48:05   (  -0.03,-137.22) (  -0.52,-139.33)  240.85                80
 01/05/2020   22:26:30   (  -0.03,-137.22) (   0.50,-134.75)  280.43                80
 01/07/2020   10:50:41   (   0.04,-137.21) (   0.65,-139.96)  312.48                80
 01/08/2020   10:29:05   (   0.03,-137.21) (  -0.38,-135.38)  208.18                80
 01/09/2020   22:53:25   (  -0.04,-137.19) (  -0.80,-140.61)  390.25                80
 01/10/2020   22:31:49   (  -0.04,-137.17) (   0.23,-136.04)  129.86                80
 01/12/2020   10:56:00   (   0.05,-137.16) (   0.98,-141.23)  464.58                80
 01/13/2020   10:34:24   (   0.04,-137.14) (  -0.06,-136.65)   55.09                80