Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 4 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/14/2020   22:35:23   (   0.02,-137.19) (   0.24,-136.10)  123.60                80
 04/16/2020   10:56:54   (  -0.01,-137.17) (   0.90,-141.30)  470.46                80
 04/17/2020   10:35:18   (  -0.01,-137.16) (  -0.09,-136.72)   50.23                80
 04/19/2020   22:38:01   (   0.01,-137.13) (  -0.04,-137.37)   26.61                80
 04/20/2020   22:21:44   (   0.01,-137.12) (   0.95,-132.78)  493.87                80
 04/22/2020   10:43:16   (  -0.01,-137.10) (   0.19,-137.99)  101.02                80
 04/23/2020   10:21:40   (  -0.01,-137.08) (  -0.86,-133.41)  418.88                80
 04/24/2020   22:43:18   (   0.01,-137.05) (  -0.32,-138.64)  180.08                80
 04/25/2020   22:27:02   (   0.01,-137.03) (   0.67,-134.05)  339.51                80
 04/27/2020   10:48:32   (  -0.01,-137.00) (   0.52,-139.24)  256.66                80