Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 10 7.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/07/2020   10:57:34   (   0.04,-137.21) (   1.05,-141.58)  498.75                80
 10/08/2020   10:38:38   (   0.04,-137.20) (   0.02,-136.99)   23.12                80
 10/10/2020   22:41:21   (  -0.03,-137.18) (  -0.12,-137.65)   52.88                80
 10/11/2020   22:25:04   (  -0.03,-137.17) (   0.91,-133.07)  468.22                80
 10/13/2020   10:43:53   (   0.02,-137.16) (   0.29,-138.25)  125.10                80
 10/14/2020   10:27:36   (   0.02,-137.14) (  -0.74,-133.67)  395.70                80
 10/15/2020   22:46:34   (  -0.02,-137.12) (  -0.44,-138.89)  202.54                80
 10/16/2020   22:30:18   (  -0.02,-137.10) (   0.59,-134.31)  318.04                80
 10/18/2020   10:49:07   (   0.02,-137.08) (   0.55,-139.50)  276.13                80
 10/19/2020   10:32:51   (   0.02,-137.06) (  -0.48,-134.92)  243.87                80
 10/20/2020   22:51:49   (  -0.02,-137.02) (  -0.70,-140.14)  355.88                80