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)
 01/03/2020   10:23:46   (   0.02,-137.22) (  -0.69,-134.10)  355.99                80
 01/04/2020   22:48:06   (  -0.03,-137.22) (  -0.49,-139.34)  240.79                80
 01/05/2020   22:26:30   (  -0.03,-137.22) (   0.54,-134.76)  280.50                80
 01/07/2020   10:50:41   (   0.04,-137.22) (   0.67,-139.95)  312.30                80
 01/08/2020   10:29:05   (   0.03,-137.21) (  -0.35,-135.37)  208.39                80
 01/09/2020   22:53:24   (  -0.04,-137.19) (  -0.83,-140.61)  390.17                80
 01/10/2020   22:31:49   (  -0.04,-137.18) (   0.20,-136.03)  129.96                80
 01/12/2020   10:56:00   (   0.05,-137.16) (   0.95,-141.24)  464.33                80
 01/13/2020   10:34:25   (   0.04,-137.14) (  -0.08,-136.66)   55.36                80
 01/15/2020   22:39:49   (  -0.05,-137.09) (  -0.07,-137.32)   25.16                80