Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 10 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/15/2020   22:46:34   (  -0.03,-137.21) (  -0.44,-138.89)  192.15                80
 10/16/2020   22:30:18   (  -0.03,-137.21) (   0.59,-134.31)  330.26                80
 10/18/2020   10:49:07   (   0.03,-137.21) (   0.54,-139.50)  261.01                80
 10/19/2020   10:32:51   (   0.03,-137.20) (  -0.49,-134.92)  260.81                80
 10/20/2020   22:51:49   (  -0.03,-137.19) (  -0.69,-140.14)  336.32                80
 10/21/2020   22:35:33   (  -0.03,-137.18) (   0.34,-135.56)  185.03                80
 10/23/2020   10:54:22   (   0.02,-137.17) (   0.80,-140.75)  407.58                80
 10/24/2020   10:38:05   (   0.02,-137.16) (  -0.23,-136.17)  113.54                80
 10/25/2020   22:57:04   (  -0.01,-137.14) (  -0.94,-141.40)  484.35                80
 10/26/2020   22:40:46   (  -0.01,-137.13) (   0.03,-136.80)   36.83                80