Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 1 31.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/31/2020   22:36:50   (  -0.04,-137.21) (   0.08,-136.57)   71.80                80
 02/03/2020   10:39:25   (   0.05,-137.19) (   0.06,-137.19)    1.39                80
 02/05/2020   22:39:30   (  -0.06,-137.16) (  -0.18,-137.86)   78.69                80
 02/06/2020   22:23:13   (  -0.06,-137.15) (   0.79,-133.27)  441.40                80
 02/08/2020   10:44:44   (   0.06,-137.12) (   0.38,-138.47)  153.26                80
 02/09/2020   10:23:08   (   0.06,-137.10) (  -0.65,-133.89)  366.24                80
 02/10/2020   22:44:47   (  -0.07,-137.07) (  -0.56,-139.12)  234.02                80
 02/11/2020   22:28:32   (  -0.07,-137.05) (   0.48,-134.54)  285.31                80
 02/13/2020   10:50:02   (   0.07,-137.02) (   0.69,-139.74)  310.19                80
 02/14/2020   10:28:27   (   0.07,-137.00) (  -0.34,-135.16)  208.73                80