Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 2 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 02/18/2020   10:55:21   (   0.03,-137.21) (   0.88,-141.03)  434.67                80
 02/19/2020   10:33:46   (   0.04,-137.21) (  -0.15,-136.46)   86.95                80
 02/21/2020   22:39:10   (  -0.04,-137.21) (  -0.01,-137.11)   12.34                80
 02/24/2020   10:41:44   (   0.04,-137.20) (   0.19,-137.72)   59.94                80
 02/25/2020   10:20:08   (   0.04,-137.19) (  -0.85,-133.15)  461.20                80
 02/26/2020   22:41:48   (  -0.04,-137.19) (  -0.33,-138.38)  135.69                80
 02/27/2020   22:25:32   (  -0.04,-137.18) (   0.71,-133.80)  385.19                80
 02/29/2020   10:47:02   (   0.05,-137.16) (   0.46,-139.00)  209.25                80
 03/01/2020   10:25:27   (   0.05,-137.15) (  -0.58,-134.43)  311.09                80
 03/02/2020   22:47:06   (  -0.05,-137.13) (  -0.59,-139.66)  287.22                80