Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 10 12.  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   22:37:37   (  -0.00,-137.20) (   0.02,-137.02)   19.54                34
 10/15/2019   10:40:58   (   0.00,-137.19) (   0.12,-137.65)   53.28                80
 10/16/2019   10:19:24   (  -0.00,-137.18) (  -0.94,-133.09)  466.97                80
 10/17/2019   22:41:04   (   0.00,-137.16) (  -0.24,-138.33)  132.78                80
 10/18/2019   22:24:49   (   0.00,-137.14) (   0.77,-133.75)  386.92                80
 10/20/2019   10:43:40   (   0.00,-137.12) (   0.39,-138.95)  208.34                80
 10/21/2019   10:27:25   (  -0.00,-137.10) (  -0.62,-134.38)  310.80                80
 10/22/2019   22:46:25   (   0.00,-137.06) (  -0.56,-139.62)  290.53                80
 10/23/2019   22:30:10   (   0.00,-137.04) (   0.45,-135.04)  228.31                80
 10/25/2019   10:49:01   (  -0.00,-137.01) (   0.71,-140.24)  368.02                80