Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 11 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/04/2020   10:29:37   (   0.03,-137.22) (  -0.71,-134.08)  358.91                80
 11/05/2020   22:48:34   (  -0.02,-137.21) (  -0.51,-139.29)  237.18                80
 11/06/2020   22:32:18   (  -0.02,-137.21) (   0.52,-134.71)  284.72                80
 11/08/2020   10:51:07   (   0.01,-137.20) (   0.62,-139.90)  307.54                80
 11/09/2020   10:34:51   (   0.01,-137.19) (  -0.41,-135.32)  213.88                80
 11/10/2020   22:53:49   (  -0.01,-137.18) (  -0.74,-140.54)  383.33                80
 11/11/2020   22:37:31   (  -0.01,-137.17) (   0.24,-135.95)  137.95                80
 11/13/2020   10:56:21   (   0.01,-137.15) (   0.92,-141.14)  455.17                80
 11/14/2020   10:40:04   (   0.01,-137.13) (  -0.11,-136.56)   65.56                80
 11/16/2020   22:40:05   (  -0.01,-137.09) (  -0.05,-137.19)   12.72                80