Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 12 2.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/02/2019   10:29:39   (  -0.00,-137.20) (  -0.39,-135.56)  188.22                80
 12/03/2019   22:53:58   (  -0.00,-137.19) (  -0.83,-140.78)  409.63                80
 12/04/2019   22:32:23   (   0.00,-137.18) (   0.24,-136.22)  111.12                80
 12/06/2019   10:56:35   (   0.00,-137.18) (   0.95,-141.41)  482.41                80
 12/07/2019   10:34:59   (  -0.00,-137.17) (  -0.07,-136.84)   38.01                80
 12/09/2019   22:40:23   (  -0.01,-137.14) (  -0.07,-137.50)   40.63                80
 12/10/2019   22:18:47   (  -0.00,-137.12) (   0.95,-132.92)  479.18                80
 12/12/2019   10:42:59   (   0.01,-137.10) (   0.24,-138.12)  116.04                80
 12/13/2019   10:21:23   (   0.01,-137.08) (  -0.78,-133.55)  403.06                80
 12/14/2019   22:45:43   (  -0.02,-137.04) (  -0.38,-138.78)  197.66                80
 12/15/2019   22:24:07   (  -0.01,-137.02) (   0.65,-134.21)  320.95                80