Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 10 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/12/2019   22:38:23   (  -0.00,-137.19) (   0.03,-137.02)   19.42                80
 10/15/2019   10:40:59   (   0.00,-137.19) (   0.12,-137.65)   53.32                80
 10/16/2019   10:19:23   (   0.00,-137.18) (  -0.89,-133.08)  466.89                80
 10/17/2019   22:41:04   (  -0.00,-137.15) (  -0.24,-138.33)  133.01                80
 10/18/2019   22:24:49   (   0.00,-137.14) (   0.77,-133.75)  386.68                80
 10/20/2019   10:43:40   (   0.00,-137.12) (   0.39,-138.95)  208.56                80
 10/21/2019   10:27:25   (   0.00,-137.10) (  -0.62,-134.38)  310.56                80
 10/22/2019   22:46:25   (  -0.00,-137.06) (  -0.56,-139.62)  290.87                80
 10/23/2019   22:30:10   (  -0.00,-137.04) (   0.45,-135.04)  227.95                80