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) (  -0.24,-138.04)   96.03                80
 12/31/2019   22:21:10   (  -0.02,-137.21) (   0.79,-133.47)  425.87                80
 01/02/2020   10:45:21   (   0.03,-137.22) (   0.38,-138.67)  166.05                80
 01/03/2020   10:23:46   (   0.02,-137.22) (  -0.65,-134.10)  355.56                80
 01/04/2020   22:48:05   (  -0.03,-137.22) (  -0.53,-139.33)  241.07                80
 01/05/2020   22:26:30   (  -0.03,-137.22) (   0.50,-134.75)  280.13                80
 01/07/2020   10:50:41   (   0.04,-137.21) (   0.66,-139.95)  312.97                80
 01/08/2020   10:29:06   (   0.04,-137.20) (  -0.37,-135.38)  207.63                80
 01/09/2020   22:53:25   (  -0.05,-137.18) (  -0.82,-140.61)  390.70                80
 01/10/2020   22:31:49   (  -0.04,-137.17) (   0.21,-136.04)  129.31                80
 01/12/2020   10:56:01   (   0.05,-137.15) (   0.95,-141.24)  465.35                80