Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 10 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)
 10/16/2019   10:22:04   (  -0.00,-137.20) (  -0.92,-133.08)  469.53                80
 10/17/2019   22:41:04   (  -0.02,-137.19) (  -0.27,-138.32)  128.11                80
 10/18/2019   22:22:08   (  -0.01,-137.19) (   0.74,-133.74)  392.10                80
 10/20/2019   10:46:20   (   0.01,-137.17) (   0.41,-138.95)  202.76                80
 10/21/2019   10:24:44   (   0.00,-137.16) (  -0.59,-134.37)  316.92                80
 10/22/2019   22:49:05   (  -0.01,-137.13) (  -0.59,-139.61)  282.78                80
 10/23/2019   22:27:30   (  -0.00,-137.12) (   0.48,-135.04)  236.71                80
 10/25/2019   10:51:40   (   0.01,-137.09) (   0.74,-140.24)  358.99                80
 10/26/2019   10:30:06   (   0.01,-137.07) (  -0.32,-135.67)  160.33                80
 10/27/2019   22:51:45   (  -0.03,-137.04) (  -0.91,-140.90)  439.94                80
 10/28/2019   22:35:30   (  -0.03,-137.02) (   0.10,-136.32)   79.10                80