Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 11 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/01/2019   10:51:15   (   0.00,-137.21) (   0.65,-140.13)  332.84                80
 12/02/2019   10:29:39   (  -0.01,-137.20) (  -0.37,-135.55)  188.11                80
 12/03/2019   22:53:58   (   0.00,-137.19) (  -0.79,-140.79)  409.50                80
 12/04/2019   22:32:23   (   0.01,-137.19) (   0.23,-136.21)  111.28                80
 12/06/2019   10:56:34   (  -0.00,-137.18) (   0.96,-141.41)  482.09                80
 12/07/2019   10:34:59   (  -0.01,-137.18) (  -0.06,-136.84)   38.49                80
 12/09/2019   22:40:23   (  -0.00,-137.15) (  -0.07,-137.50)   39.86                80
 12/10/2019   22:18:47   (   0.00,-137.13) (   0.95,-132.92)  479.99                80
 12/12/2019   10:42:58   (   0.01,-137.11) (   0.24,-138.12)  115.10                80
 12/13/2019   10:21:23   (   0.01,-137.09) (  -0.78,-133.55)  404.10                80