Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 11 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/19/2020   10:42:38   (   0.02,-137.20) (   0.13,-137.80)   68.30                80
 11/20/2020   10:26:21   (   0.02,-137.19) (  -0.90,-133.22)  453.03                80
 11/21/2020   22:45:19   (  -0.01,-137.17) (  -0.28,-138.43)  144.31                80
 11/22/2020   22:29:02   (  -0.01,-137.16) (   0.76,-133.85)  376.95                80
 11/24/2020   10:47:51   (   0.01,-137.14) (   0.40,-139.04)  216.03                80
 11/25/2020   10:31:34   (   0.01,-137.13) (  -0.58,-134.45)  305.03                80
 11/26/2020   22:50:31   (  -0.01,-137.10) (  -0.60,-139.67)  292.79                80
 11/27/2020   22:34:15   (  -0.01,-137.09) (   0.44,-135.09)  227.93                80
 11/29/2020   10:53:04   (   0.01,-137.06) (   0.73,-140.27)  366.11                80
 11/30/2020   10:36:48   (   0.01,-137.04) (  -0.31,-135.69)  154.06                80
 12/01/2020   22:55:44   (  -0.01,-137.00) (  -0.91,-140.90)  445.20                80
 12/02/2020   22:39:27   (  -0.01,-136.98) (   0.14,-136.32)   74.41                80