Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 10 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/10/2019   10:35:38   (  -0.01,-137.21) (  -0.22,-136.36)   96.37                80
 10/12/2019   22:38:23   (   0.01,-137.19) (   0.04,-137.02)   18.51                80
 10/15/2019   10:38:19   (  -0.00,-137.18) (   0.11,-137.65)   54.31                80
 10/16/2019   10:22:03   (   0.01,-137.17) (  -0.90,-133.08)  465.99                80
 10/17/2019   22:41:04   (  -0.02,-137.14) (  -0.28,-138.32)  133.96                80
 10/18/2019   22:22:08   (  -0.02,-137.12) (   0.73,-133.74)  385.43                80
 10/20/2019   10:46:19   (   0.02,-137.10) (   0.43,-138.94)  209.96                80
 10/21/2019   10:24:44   (   0.01,-137.08) (  -0.58,-134.37)  308.88                80
 10/22/2019   22:49:04   (  -0.02,-137.04) (  -0.59,-139.61)  292.93                80
 10/23/2019   22:27:29   (  -0.01,-137.01) (   0.42,-135.03)  225.66                80