Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 10 5.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/05/2020   22:38:46   (  -0.04,-137.21) (   0.17,-136.40)   92.60                80
 10/07/2020   10:57:35   (   0.03,-137.21) (   1.03,-141.58)  499.04                80
 10/08/2020   10:38:38   (   0.03,-137.20) (   0.01,-137.00)   22.62                80
 10/10/2020   22:41:21   (  -0.02,-137.18) (  -0.10,-137.65)   53.81                80
 10/11/2020   22:25:05   (  -0.02,-137.17) (   0.92,-133.07)  467.21                80
 10/13/2020   10:43:53   (   0.01,-137.15) (   0.28,-138.25)  126.08                80
 10/14/2020   10:27:36   (   0.01,-137.13) (  -0.75,-133.67)  394.58                80
 10/15/2020   22:46:35   (  -0.01,-137.11) (  -0.43,-138.89)  203.98                80
 10/16/2020   22:30:18   (  -0.01,-137.09) (   0.60,-134.31)  316.47                80
 10/18/2020   10:49:07   (   0.01,-137.06) (   0.54,-139.50)  277.70                80
 10/19/2020   10:32:51   (   0.02,-137.04) (  -0.49,-134.92)  242.20                80