Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 12 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/30/2019   22:42:46   (  -0.03,-137.21) (  -0.21,-138.05)   95.99                80
 12/31/2019   22:21:11   (  -0.02,-137.21) (   0.82,-133.48)  425.87                80
 01/02/2020   10:45:22   (   0.03,-137.22) (   0.35,-138.68)  165.98                80
 01/03/2020   10:23:46   (   0.02,-137.22) (  -0.68,-134.10)  355.60                80
 01/04/2020   22:48:06   (  -0.03,-137.22) (  -0.50,-139.33)  241.08                80
 01/05/2020   22:26:30   (  -0.03,-137.21) (   0.53,-134.76)  280.09                80
 01/07/2020   10:50:42   (   0.04,-137.21) (   0.63,-139.96)  312.96                80
 01/08/2020   10:29:05   (   0.04,-137.20) (  -0.34,-135.37)  207.68                80
 01/09/2020   22:53:24   (  -0.05,-137.18) (  -0.84,-140.61)  390.76                80
 01/10/2020   22:31:49   (  -0.04,-137.17) (   0.19,-136.03)  129.28                80
 01/12/2020   10:56:00   (   0.05,-137.15) (   0.96,-141.23)  465.33                80
 01/13/2020   10:34:25   (   0.05,-137.13) (  -0.06,-136.66)   54.25                80