Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2019 11 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/13/2019   22:32:37   (  -0.01,-137.21) (   0.34,-135.63)  179.48                80
 11/15/2019   10:54:08   (   0.01,-137.20) (   0.84,-140.83)  414.51                80
 11/16/2019   10:32:33   (   0.01,-137.19) (  -0.18,-136.26)  105.74                80
 11/17/2019   22:54:13   (  -0.01,-137.17) (  -0.95,-141.50)  493.43                80
 11/18/2019   22:37:58   (  -0.01,-137.15) (   0.07,-136.93)   26.53                80
 11/21/2019   10:40:34   (   0.00,-137.12) (   0.10,-137.55)   49.46                80
 11/22/2019   10:18:58   (   0.00,-137.10) (  -0.91,-132.97)  469.95                80
 11/23/2019   22:40:37   (  -0.00,-137.07) (  -0.26,-138.21)  130.16                80
 11/24/2019   22:24:22   (  -0.01,-137.05) (   0.76,-133.63)  389.09                80
 11/26/2019   10:45:53   (   0.01,-137.02) (   0.43,-138.83)  207.31                80