Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 12 3.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/03/2019   22:53:58   (  -0.01,-137.20) (  -0.84,-140.78)  408.73                80
 12/04/2019   22:32:23   (  -0.00,-137.20) (   0.24,-136.21)  112.64                80
 12/06/2019   10:56:34   (   0.01,-137.20) (   0.95,-141.41)  479.74                80
 12/07/2019   10:34:59   (   0.00,-137.20) (  -0.07,-136.84)   41.30                80
 12/09/2019   22:40:23   (  -0.01,-137.18) (  -0.07,-137.50)   35.98                80
 12/10/2019   22:18:47   (  -0.01,-137.17) (   0.95,-132.92)  484.40                80
 12/12/2019   10:42:59   (   0.02,-137.16) (   0.25,-138.12)  109.69                80
 12/13/2019   10:21:23   (   0.01,-137.14) (  -0.77,-133.54)  410.03                80
 12/14/2019   22:45:43   (  -0.02,-137.11) (  -0.39,-138.78)  189.97                80
 12/15/2019   22:24:07   (  -0.01,-137.09) (   0.63,-134.20)  329.22                80
 12/17/2019   10:48:18   (   0.02,-137.07) (   0.56,-139.40)  266.35                80