Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 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)
 10/16/2020   22:30:18   (  -0.03,-137.21) (   0.63,-134.31)  330.28                80
 10/18/2020   10:49:07   (   0.03,-137.21) (   0.57,-139.49)  260.86                80
 10/19/2020   10:32:50   (   0.03,-137.21) (  -0.46,-134.91)  261.01                80
 10/20/2020   22:51:50   (  -0.03,-137.19) (  -0.66,-140.15)  336.16                80
 10/21/2020   22:35:32   (  -0.03,-137.18) (   0.31,-135.55)  185.26                80
 10/23/2020   10:54:21   (   0.02,-137.17) (   0.82,-140.75)  407.24                80
 10/24/2020   10:38:05   (   0.02,-137.16) (  -0.21,-136.17)  113.88                80
 10/25/2020   22:57:03   (  -0.01,-137.14) (  -0.96,-141.39)  483.98                80
 10/26/2020   22:40:47   (  -0.01,-137.13) (   0.07,-136.81)   37.10                80
 10/29/2020   10:40:39   (   0.01,-137.11) (   0.10,-137.41)   34.91                80