Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 10 3.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/03/2020   10:36:04   (   0.04,-137.21) (  -0.30,-135.76)  166.00                80
 10/04/2020   22:55:02   (  -0.03,-137.20) (  -0.88,-140.98)  430.13                80
 10/05/2020   22:38:46   (  -0.04,-137.20) (   0.14,-136.40)   92.08                80
 10/07/2020   10:57:35   (   0.03,-137.21) (   1.00,-141.59)  499.00                80
 10/08/2020   10:41:19   (   0.03,-137.20) (  -0.02,-137.01)   22.60                80
 10/10/2020   22:41:21   (  -0.02,-137.17) (  -0.13,-137.65)   54.32                80
 10/11/2020   22:25:04   (  -0.02,-137.16) (   0.89,-133.07)  466.59                80
 10/13/2020   10:43:53   (   0.01,-137.15) (   0.25,-138.26)  126.20                80
 10/14/2020   10:27:37   (   0.01,-137.14) (  -0.78,-133.68)  394.45                80
 10/15/2020   22:46:35   (  -0.01,-137.10) (  -0.40,-138.90)  204.68                80
 10/16/2020   22:30:19   (  -0.01,-137.09) (   0.63,-134.32)  315.73                80