Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 2 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)
 02/03/2020   10:39:25   (   0.04,-137.19) (   0.04,-137.20)    0.30                80
 02/05/2020   22:39:29   (  -0.05,-137.16) (  -0.22,-137.85)   78.63                80
 02/06/2020   22:23:14   (  -0.05,-137.15) (   0.81,-133.27)  441.48                80
 02/08/2020   10:44:44   (   0.06,-137.13) (   0.36,-138.47)  153.06                80
 02/09/2020   10:23:08   (   0.06,-137.11) (  -0.68,-133.90)  366.49                80
 02/10/2020   22:44:48   (  -0.06,-137.07) (  -0.54,-139.12)  233.82                80
 02/11/2020   22:28:32   (  -0.06,-137.05) (   0.50,-134.55)  285.55                80
 02/13/2020   10:50:03   (   0.06,-137.03) (   0.67,-139.74)  309.81                80
 02/14/2020   10:28:27   (   0.06,-137.00) (  -0.36,-135.17)  209.17                80