Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 11 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/16/2019   10:32:33   (   0.01,-137.21) (  -0.18,-136.25)  108.48                80
 11/17/2019   22:54:13   (  -0.00,-137.20) (  -0.95,-141.50)  489.41                80
 11/18/2019   22:37:58   (   0.01,-137.20) (   0.07,-136.92)   31.07                80
 11/21/2019   10:40:34   (  -0.01,-137.18) (   0.10,-137.55)   43.30                80
 11/22/2019   10:18:59   (  -0.01,-137.17) (  -0.97,-132.99)  476.91                80
 11/23/2019   22:40:38   (   0.01,-137.15) (  -0.21,-138.22)  121.61                80
 11/24/2019   22:21:43   (   0.01,-137.13) (   0.81,-133.64)  398.44                80
 11/26/2019   10:45:54   (   0.01,-137.11) (   0.38,-138.84)  196.88                80
 11/27/2019   10:24:19   (   0.00,-137.09) (  -0.64,-134.27)  322.52                80
 11/28/2019   22:48:38   (  -0.01,-137.06) (  -0.53,-139.50)  277.32                80
 11/29/2019   22:27:03   (  -0.00,-137.04) (   0.49,-134.93)  241.81                80