Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 1 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/25/2020   22:50:27   (  -0.04,-137.21) (  -0.66,-139.87)  303.50                80
 01/26/2020   22:28:51   (  -0.04,-137.21) (   0.37,-135.29)  218.32                80
 01/28/2020   10:53:01   (   0.05,-137.21) (   0.80,-140.49)  373.93                80
 01/29/2020   10:31:26   (   0.05,-137.21) (  -0.23,-135.91)  147.61                80
 01/30/2020   22:55:46   (  -0.05,-137.21) (  -0.92,-141.15)  449.01                80
 01/31/2020   22:34:11   (  -0.05,-137.21) (   0.11,-136.58)   72.25                80
 02/03/2020   10:39:25   (   0.06,-137.19) (   0.09,-137.19)    3.13                80
 02/05/2020   22:42:09   (  -0.07,-137.16) (  -0.20,-137.85)   78.24                80
 02/06/2020   22:20:34   (  -0.07,-137.15) (   0.83,-133.28)  441.76                80